Quantifying the ionization quenching effect in organic plastic scintillators used in MV photon dosimetry
Miniature organic plastic scintillators attached to optical fiber cables have found important uses in medical dosimetry, in particular for small-field dosimetry and field output factor measurements in megavoltage linear accelerator beams. Plastic scintillators are well suited for these applications...
Ausführliche Beschreibung
Gespeichert in:
| Autor*in: |
Santurio, Grichar Valdes [verfasserIn] |
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| Format: |
E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2019transfer abstract |
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| Schlagwörter: |
Ionization quenching correction factor |
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| Übergeordnetes Werk: |
Enthalten in: Long-term Increase in Subfoveal Choroidal Thickness After Surgery for Senile Cataracts - Wang, Wei ELSEVIER, 2014, Amsterdam [u.a.] |
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| Übergeordnetes Werk: |
volume:129 ; year:2019 ; pages:0 |
| Links: |
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| DOI / URN: |
10.1016/j.radmeas.2019.106200 |
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| Katalog-ID: |
ELV048613843 |
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| 245 | 1 | 0 | |a Quantifying the ionization quenching effect in organic plastic scintillators used in MV photon dosimetry |
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| 520 | |a Miniature organic plastic scintillators attached to optical fiber cables have found important uses in medical dosimetry, in particular for small-field dosimetry and field output factor measurements in megavoltage linear accelerator beams. Plastic scintillators are well suited for these applications due to their high degree of water equivalence and their small size. Plastic scintillators, however, are known to suffer from ionization quenching, meaning that the light production per absorbed dose decreases if the dose deposition is caused by low energy electrons. As MV beams also lead to dose deposition by low energy electrons, ionization quenching will also affect, for example, field output factor measurements in MV beams if the fraction of dose delivered by low energy electrons changes with field size or beam quality. While the influence of ionization quenching on scintillator dosimetry in beams of heavy charge particles or kV x-ray has been subject to much research, the effect in MV beams is less well studied, and it is often implicitly assumed that there is no effect. The purpose of this work therefore was to quantify the influence of ionization quenching on plastic scintillators, specifically BCF-60, for the two application in MV photon dosimetry: (i) field output factor measurements for field sizes from 0.5 × 0.5 cm 2 to 10 × 10 cm 2 for a 6 MV beam and (ii) ionization chambers beam quality correction factor ( k Q -factors) measurements for beams between 4 MV and 15 MV at a fixed 10 × 10 cm 2 field size. The quenching was quantified using Monte Carlo modelling of the MV beams, a variation of Birks formalism that accounted for the detailed dose deposition by secondary electrons, and quenching parameters established previously using experiments in kV x-ray beams. This enabled the computation of the light yield in a “quenching free” scintillator and therefore a computation of a correction factor due to ionization quenching. Ionization quenching was found to have a small but statistically significant influence on both of the studied applications: ( 0.6 ± 0.2 ) % for the field output factor measurements between 0.5 × 0.5 cm 2 and 10 × 10 cm 2 and about ( 2 ± 0.4 ) % for the k Q -factor application for beams between 4 MV and 15 MV. The modelling results were in agreement with experimental measurements. The results support that the ionization quenching effect has a small effect on field-output factor measurements and it can probably be neglected during cl... | ||
| 520 | |a Miniature organic plastic scintillators attached to optical fiber cables have found important uses in medical dosimetry, in particular for small-field dosimetry and field output factor measurements in megavoltage linear accelerator beams. Plastic scintillators are well suited for these applications due to their high degree of water equivalence and their small size. Plastic scintillators, however, are known to suffer from ionization quenching, meaning that the light production per absorbed dose decreases if the dose deposition is caused by low energy electrons. As MV beams also lead to dose deposition by low energy electrons, ionization quenching will also affect, for example, field output factor measurements in MV beams if the fraction of dose delivered by low energy electrons changes with field size or beam quality. While the influence of ionization quenching on scintillator dosimetry in beams of heavy charge particles or kV x-ray has been subject to much research, the effect in MV beams is less well studied, and it is often implicitly assumed that there is no effect. The purpose of this work therefore was to quantify the influence of ionization quenching on plastic scintillators, specifically BCF-60, for the two application in MV photon dosimetry: (i) field output factor measurements for field sizes from 0.5 × 0.5 cm 2 to 10 × 10 cm 2 for a 6 MV beam and (ii) ionization chambers beam quality correction factor ( k Q -factors) measurements for beams between 4 MV and 15 MV at a fixed 10 × 10 cm 2 field size. The quenching was quantified using Monte Carlo modelling of the MV beams, a variation of Birks formalism that accounted for the detailed dose deposition by secondary electrons, and quenching parameters established previously using experiments in kV x-ray beams. This enabled the computation of the light yield in a “quenching free” scintillator and therefore a computation of a correction factor due to ionization quenching. Ionization quenching was found to have a small but statistically significant influence on both of the studied applications: ( 0.6 ± 0.2 ) % for the field output factor measurements between 0.5 × 0.5 cm 2 and 10 × 10 cm 2 and about ( 2 ± 0.4 ) % for the k Q -factor application for beams between 4 MV and 15 MV. The modelling results were in agreement with experimental measurements. The results support that the ionization quenching effect has a small effect on field-output factor measurements and it can probably be neglected during cl... | ||
| 650 | 7 | |a Ionization quenching correction factor |2 Elsevier | |
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10.1016/j.radmeas.2019.106200 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000000823.pica (DE-627)ELV048613843 (ELSEVIER)S1350-4487(19)30486-X DE-627 ger DE-627 rakwb eng 610 VZ 300 330 VZ 83.00 bkl 85.00 bkl 83.11 bkl Santurio, Grichar Valdes verfasserin aut Quantifying the ionization quenching effect in organic plastic scintillators used in MV photon dosimetry 2019transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Miniature organic plastic scintillators attached to optical fiber cables have found important uses in medical dosimetry, in particular for small-field dosimetry and field output factor measurements in megavoltage linear accelerator beams. Plastic scintillators are well suited for these applications due to their high degree of water equivalence and their small size. Plastic scintillators, however, are known to suffer from ionization quenching, meaning that the light production per absorbed dose decreases if the dose deposition is caused by low energy electrons. As MV beams also lead to dose deposition by low energy electrons, ionization quenching will also affect, for example, field output factor measurements in MV beams if the fraction of dose delivered by low energy electrons changes with field size or beam quality. While the influence of ionization quenching on scintillator dosimetry in beams of heavy charge particles or kV x-ray has been subject to much research, the effect in MV beams is less well studied, and it is often implicitly assumed that there is no effect. The purpose of this work therefore was to quantify the influence of ionization quenching on plastic scintillators, specifically BCF-60, for the two application in MV photon dosimetry: (i) field output factor measurements for field sizes from 0.5 × 0.5 cm 2 to 10 × 10 cm 2 for a 6 MV beam and (ii) ionization chambers beam quality correction factor ( k Q -factors) measurements for beams between 4 MV and 15 MV at a fixed 10 × 10 cm 2 field size. The quenching was quantified using Monte Carlo modelling of the MV beams, a variation of Birks formalism that accounted for the detailed dose deposition by secondary electrons, and quenching parameters established previously using experiments in kV x-ray beams. This enabled the computation of the light yield in a “quenching free” scintillator and therefore a computation of a correction factor due to ionization quenching. Ionization quenching was found to have a small but statistically significant influence on both of the studied applications: ( 0.6 ± 0.2 ) % for the field output factor measurements between 0.5 × 0.5 cm 2 and 10 × 10 cm 2 and about ( 2 ± 0.4 ) % for the k Q -factor application for beams between 4 MV and 15 MV. The modelling results were in agreement with experimental measurements. The results support that the ionization quenching effect has a small effect on field-output factor measurements and it can probably be neglected during cl... Miniature organic plastic scintillators attached to optical fiber cables have found important uses in medical dosimetry, in particular for small-field dosimetry and field output factor measurements in megavoltage linear accelerator beams. Plastic scintillators are well suited for these applications due to their high degree of water equivalence and their small size. Plastic scintillators, however, are known to suffer from ionization quenching, meaning that the light production per absorbed dose decreases if the dose deposition is caused by low energy electrons. As MV beams also lead to dose deposition by low energy electrons, ionization quenching will also affect, for example, field output factor measurements in MV beams if the fraction of dose delivered by low energy electrons changes with field size or beam quality. While the influence of ionization quenching on scintillator dosimetry in beams of heavy charge particles or kV x-ray has been subject to much research, the effect in MV beams is less well studied, and it is often implicitly assumed that there is no effect. The purpose of this work therefore was to quantify the influence of ionization quenching on plastic scintillators, specifically BCF-60, for the two application in MV photon dosimetry: (i) field output factor measurements for field sizes from 0.5 × 0.5 cm 2 to 10 × 10 cm 2 for a 6 MV beam and (ii) ionization chambers beam quality correction factor ( k Q -factors) measurements for beams between 4 MV and 15 MV at a fixed 10 × 10 cm 2 field size. The quenching was quantified using Monte Carlo modelling of the MV beams, a variation of Birks formalism that accounted for the detailed dose deposition by secondary electrons, and quenching parameters established previously using experiments in kV x-ray beams. This enabled the computation of the light yield in a “quenching free” scintillator and therefore a computation of a correction factor due to ionization quenching. Ionization quenching was found to have a small but statistically significant influence on both of the studied applications: ( 0.6 ± 0.2 ) % for the field output factor measurements between 0.5 × 0.5 cm 2 and 10 × 10 cm 2 and about ( 2 ± 0.4 ) % for the k Q -factor application for beams between 4 MV and 15 MV. The modelling results were in agreement with experimental measurements. The results support that the ionization quenching effect has a small effect on field-output factor measurements and it can probably be neglected during cl... Ionization quenching correction factor Elsevier Monte Carlo Elsevier Beam quality correction factor Elsevier Ionization quenching effect Elsevier Output Factor Elsevier Andersen, Claus E. oth Enthalten in Elsevier Science Wang, Wei ELSEVIER Long-term Increase in Subfoveal Choroidal Thickness After Surgery for Senile Cataracts 2014 Amsterdam [u.a.] (DE-627)ELV012541583 volume:129 year:2019 pages:0 https://doi.org/10.1016/j.radmeas.2019.106200 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U 83.00 Volkswirtschaft: Allgemeines VZ 85.00 Betriebswirtschaft: Allgemeines VZ 83.11 Mikroökonomie VZ AR 129 2019 0 |
| spelling |
10.1016/j.radmeas.2019.106200 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000000823.pica (DE-627)ELV048613843 (ELSEVIER)S1350-4487(19)30486-X DE-627 ger DE-627 rakwb eng 610 VZ 300 330 VZ 83.00 bkl 85.00 bkl 83.11 bkl Santurio, Grichar Valdes verfasserin aut Quantifying the ionization quenching effect in organic plastic scintillators used in MV photon dosimetry 2019transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Miniature organic plastic scintillators attached to optical fiber cables have found important uses in medical dosimetry, in particular for small-field dosimetry and field output factor measurements in megavoltage linear accelerator beams. Plastic scintillators are well suited for these applications due to their high degree of water equivalence and their small size. Plastic scintillators, however, are known to suffer from ionization quenching, meaning that the light production per absorbed dose decreases if the dose deposition is caused by low energy electrons. As MV beams also lead to dose deposition by low energy electrons, ionization quenching will also affect, for example, field output factor measurements in MV beams if the fraction of dose delivered by low energy electrons changes with field size or beam quality. While the influence of ionization quenching on scintillator dosimetry in beams of heavy charge particles or kV x-ray has been subject to much research, the effect in MV beams is less well studied, and it is often implicitly assumed that there is no effect. The purpose of this work therefore was to quantify the influence of ionization quenching on plastic scintillators, specifically BCF-60, for the two application in MV photon dosimetry: (i) field output factor measurements for field sizes from 0.5 × 0.5 cm 2 to 10 × 10 cm 2 for a 6 MV beam and (ii) ionization chambers beam quality correction factor ( k Q -factors) measurements for beams between 4 MV and 15 MV at a fixed 10 × 10 cm 2 field size. The quenching was quantified using Monte Carlo modelling of the MV beams, a variation of Birks formalism that accounted for the detailed dose deposition by secondary electrons, and quenching parameters established previously using experiments in kV x-ray beams. This enabled the computation of the light yield in a “quenching free” scintillator and therefore a computation of a correction factor due to ionization quenching. Ionization quenching was found to have a small but statistically significant influence on both of the studied applications: ( 0.6 ± 0.2 ) % for the field output factor measurements between 0.5 × 0.5 cm 2 and 10 × 10 cm 2 and about ( 2 ± 0.4 ) % for the k Q -factor application for beams between 4 MV and 15 MV. The modelling results were in agreement with experimental measurements. The results support that the ionization quenching effect has a small effect on field-output factor measurements and it can probably be neglected during cl... Miniature organic plastic scintillators attached to optical fiber cables have found important uses in medical dosimetry, in particular for small-field dosimetry and field output factor measurements in megavoltage linear accelerator beams. Plastic scintillators are well suited for these applications due to their high degree of water equivalence and their small size. Plastic scintillators, however, are known to suffer from ionization quenching, meaning that the light production per absorbed dose decreases if the dose deposition is caused by low energy electrons. As MV beams also lead to dose deposition by low energy electrons, ionization quenching will also affect, for example, field output factor measurements in MV beams if the fraction of dose delivered by low energy electrons changes with field size or beam quality. While the influence of ionization quenching on scintillator dosimetry in beams of heavy charge particles or kV x-ray has been subject to much research, the effect in MV beams is less well studied, and it is often implicitly assumed that there is no effect. The purpose of this work therefore was to quantify the influence of ionization quenching on plastic scintillators, specifically BCF-60, for the two application in MV photon dosimetry: (i) field output factor measurements for field sizes from 0.5 × 0.5 cm 2 to 10 × 10 cm 2 for a 6 MV beam and (ii) ionization chambers beam quality correction factor ( k Q -factors) measurements for beams between 4 MV and 15 MV at a fixed 10 × 10 cm 2 field size. The quenching was quantified using Monte Carlo modelling of the MV beams, a variation of Birks formalism that accounted for the detailed dose deposition by secondary electrons, and quenching parameters established previously using experiments in kV x-ray beams. This enabled the computation of the light yield in a “quenching free” scintillator and therefore a computation of a correction factor due to ionization quenching. Ionization quenching was found to have a small but statistically significant influence on both of the studied applications: ( 0.6 ± 0.2 ) % for the field output factor measurements between 0.5 × 0.5 cm 2 and 10 × 10 cm 2 and about ( 2 ± 0.4 ) % for the k Q -factor application for beams between 4 MV and 15 MV. The modelling results were in agreement with experimental measurements. The results support that the ionization quenching effect has a small effect on field-output factor measurements and it can probably be neglected during cl... Ionization quenching correction factor Elsevier Monte Carlo Elsevier Beam quality correction factor Elsevier Ionization quenching effect Elsevier Output Factor Elsevier Andersen, Claus E. oth Enthalten in Elsevier Science Wang, Wei ELSEVIER Long-term Increase in Subfoveal Choroidal Thickness After Surgery for Senile Cataracts 2014 Amsterdam [u.a.] (DE-627)ELV012541583 volume:129 year:2019 pages:0 https://doi.org/10.1016/j.radmeas.2019.106200 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U 83.00 Volkswirtschaft: Allgemeines VZ 85.00 Betriebswirtschaft: Allgemeines VZ 83.11 Mikroökonomie VZ AR 129 2019 0 |
| allfields_unstemmed |
10.1016/j.radmeas.2019.106200 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000000823.pica (DE-627)ELV048613843 (ELSEVIER)S1350-4487(19)30486-X DE-627 ger DE-627 rakwb eng 610 VZ 300 330 VZ 83.00 bkl 85.00 bkl 83.11 bkl Santurio, Grichar Valdes verfasserin aut Quantifying the ionization quenching effect in organic plastic scintillators used in MV photon dosimetry 2019transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Miniature organic plastic scintillators attached to optical fiber cables have found important uses in medical dosimetry, in particular for small-field dosimetry and field output factor measurements in megavoltage linear accelerator beams. Plastic scintillators are well suited for these applications due to their high degree of water equivalence and their small size. Plastic scintillators, however, are known to suffer from ionization quenching, meaning that the light production per absorbed dose decreases if the dose deposition is caused by low energy electrons. As MV beams also lead to dose deposition by low energy electrons, ionization quenching will also affect, for example, field output factor measurements in MV beams if the fraction of dose delivered by low energy electrons changes with field size or beam quality. While the influence of ionization quenching on scintillator dosimetry in beams of heavy charge particles or kV x-ray has been subject to much research, the effect in MV beams is less well studied, and it is often implicitly assumed that there is no effect. The purpose of this work therefore was to quantify the influence of ionization quenching on plastic scintillators, specifically BCF-60, for the two application in MV photon dosimetry: (i) field output factor measurements for field sizes from 0.5 × 0.5 cm 2 to 10 × 10 cm 2 for a 6 MV beam and (ii) ionization chambers beam quality correction factor ( k Q -factors) measurements for beams between 4 MV and 15 MV at a fixed 10 × 10 cm 2 field size. The quenching was quantified using Monte Carlo modelling of the MV beams, a variation of Birks formalism that accounted for the detailed dose deposition by secondary electrons, and quenching parameters established previously using experiments in kV x-ray beams. This enabled the computation of the light yield in a “quenching free” scintillator and therefore a computation of a correction factor due to ionization quenching. Ionization quenching was found to have a small but statistically significant influence on both of the studied applications: ( 0.6 ± 0.2 ) % for the field output factor measurements between 0.5 × 0.5 cm 2 and 10 × 10 cm 2 and about ( 2 ± 0.4 ) % for the k Q -factor application for beams between 4 MV and 15 MV. The modelling results were in agreement with experimental measurements. The results support that the ionization quenching effect has a small effect on field-output factor measurements and it can probably be neglected during cl... Miniature organic plastic scintillators attached to optical fiber cables have found important uses in medical dosimetry, in particular for small-field dosimetry and field output factor measurements in megavoltage linear accelerator beams. Plastic scintillators are well suited for these applications due to their high degree of water equivalence and their small size. Plastic scintillators, however, are known to suffer from ionization quenching, meaning that the light production per absorbed dose decreases if the dose deposition is caused by low energy electrons. As MV beams also lead to dose deposition by low energy electrons, ionization quenching will also affect, for example, field output factor measurements in MV beams if the fraction of dose delivered by low energy electrons changes with field size or beam quality. While the influence of ionization quenching on scintillator dosimetry in beams of heavy charge particles or kV x-ray has been subject to much research, the effect in MV beams is less well studied, and it is often implicitly assumed that there is no effect. The purpose of this work therefore was to quantify the influence of ionization quenching on plastic scintillators, specifically BCF-60, for the two application in MV photon dosimetry: (i) field output factor measurements for field sizes from 0.5 × 0.5 cm 2 to 10 × 10 cm 2 for a 6 MV beam and (ii) ionization chambers beam quality correction factor ( k Q -factors) measurements for beams between 4 MV and 15 MV at a fixed 10 × 10 cm 2 field size. The quenching was quantified using Monte Carlo modelling of the MV beams, a variation of Birks formalism that accounted for the detailed dose deposition by secondary electrons, and quenching parameters established previously using experiments in kV x-ray beams. This enabled the computation of the light yield in a “quenching free” scintillator and therefore a computation of a correction factor due to ionization quenching. Ionization quenching was found to have a small but statistically significant influence on both of the studied applications: ( 0.6 ± 0.2 ) % for the field output factor measurements between 0.5 × 0.5 cm 2 and 10 × 10 cm 2 and about ( 2 ± 0.4 ) % for the k Q -factor application for beams between 4 MV and 15 MV. The modelling results were in agreement with experimental measurements. The results support that the ionization quenching effect has a small effect on field-output factor measurements and it can probably be neglected during cl... Ionization quenching correction factor Elsevier Monte Carlo Elsevier Beam quality correction factor Elsevier Ionization quenching effect Elsevier Output Factor Elsevier Andersen, Claus E. oth Enthalten in Elsevier Science Wang, Wei ELSEVIER Long-term Increase in Subfoveal Choroidal Thickness After Surgery for Senile Cataracts 2014 Amsterdam [u.a.] (DE-627)ELV012541583 volume:129 year:2019 pages:0 https://doi.org/10.1016/j.radmeas.2019.106200 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U 83.00 Volkswirtschaft: Allgemeines VZ 85.00 Betriebswirtschaft: Allgemeines VZ 83.11 Mikroökonomie VZ AR 129 2019 0 |
| allfieldsGer |
10.1016/j.radmeas.2019.106200 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000000823.pica (DE-627)ELV048613843 (ELSEVIER)S1350-4487(19)30486-X DE-627 ger DE-627 rakwb eng 610 VZ 300 330 VZ 83.00 bkl 85.00 bkl 83.11 bkl Santurio, Grichar Valdes verfasserin aut Quantifying the ionization quenching effect in organic plastic scintillators used in MV photon dosimetry 2019transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Miniature organic plastic scintillators attached to optical fiber cables have found important uses in medical dosimetry, in particular for small-field dosimetry and field output factor measurements in megavoltage linear accelerator beams. Plastic scintillators are well suited for these applications due to their high degree of water equivalence and their small size. Plastic scintillators, however, are known to suffer from ionization quenching, meaning that the light production per absorbed dose decreases if the dose deposition is caused by low energy electrons. As MV beams also lead to dose deposition by low energy electrons, ionization quenching will also affect, for example, field output factor measurements in MV beams if the fraction of dose delivered by low energy electrons changes with field size or beam quality. While the influence of ionization quenching on scintillator dosimetry in beams of heavy charge particles or kV x-ray has been subject to much research, the effect in MV beams is less well studied, and it is often implicitly assumed that there is no effect. The purpose of this work therefore was to quantify the influence of ionization quenching on plastic scintillators, specifically BCF-60, for the two application in MV photon dosimetry: (i) field output factor measurements for field sizes from 0.5 × 0.5 cm 2 to 10 × 10 cm 2 for a 6 MV beam and (ii) ionization chambers beam quality correction factor ( k Q -factors) measurements for beams between 4 MV and 15 MV at a fixed 10 × 10 cm 2 field size. The quenching was quantified using Monte Carlo modelling of the MV beams, a variation of Birks formalism that accounted for the detailed dose deposition by secondary electrons, and quenching parameters established previously using experiments in kV x-ray beams. This enabled the computation of the light yield in a “quenching free” scintillator and therefore a computation of a correction factor due to ionization quenching. Ionization quenching was found to have a small but statistically significant influence on both of the studied applications: ( 0.6 ± 0.2 ) % for the field output factor measurements between 0.5 × 0.5 cm 2 and 10 × 10 cm 2 and about ( 2 ± 0.4 ) % for the k Q -factor application for beams between 4 MV and 15 MV. The modelling results were in agreement with experimental measurements. The results support that the ionization quenching effect has a small effect on field-output factor measurements and it can probably be neglected during cl... Miniature organic plastic scintillators attached to optical fiber cables have found important uses in medical dosimetry, in particular for small-field dosimetry and field output factor measurements in megavoltage linear accelerator beams. Plastic scintillators are well suited for these applications due to their high degree of water equivalence and their small size. Plastic scintillators, however, are known to suffer from ionization quenching, meaning that the light production per absorbed dose decreases if the dose deposition is caused by low energy electrons. As MV beams also lead to dose deposition by low energy electrons, ionization quenching will also affect, for example, field output factor measurements in MV beams if the fraction of dose delivered by low energy electrons changes with field size or beam quality. While the influence of ionization quenching on scintillator dosimetry in beams of heavy charge particles or kV x-ray has been subject to much research, the effect in MV beams is less well studied, and it is often implicitly assumed that there is no effect. The purpose of this work therefore was to quantify the influence of ionization quenching on plastic scintillators, specifically BCF-60, for the two application in MV photon dosimetry: (i) field output factor measurements for field sizes from 0.5 × 0.5 cm 2 to 10 × 10 cm 2 for a 6 MV beam and (ii) ionization chambers beam quality correction factor ( k Q -factors) measurements for beams between 4 MV and 15 MV at a fixed 10 × 10 cm 2 field size. The quenching was quantified using Monte Carlo modelling of the MV beams, a variation of Birks formalism that accounted for the detailed dose deposition by secondary electrons, and quenching parameters established previously using experiments in kV x-ray beams. This enabled the computation of the light yield in a “quenching free” scintillator and therefore a computation of a correction factor due to ionization quenching. Ionization quenching was found to have a small but statistically significant influence on both of the studied applications: ( 0.6 ± 0.2 ) % for the field output factor measurements between 0.5 × 0.5 cm 2 and 10 × 10 cm 2 and about ( 2 ± 0.4 ) % for the k Q -factor application for beams between 4 MV and 15 MV. The modelling results were in agreement with experimental measurements. The results support that the ionization quenching effect has a small effect on field-output factor measurements and it can probably be neglected during cl... Ionization quenching correction factor Elsevier Monte Carlo Elsevier Beam quality correction factor Elsevier Ionization quenching effect Elsevier Output Factor Elsevier Andersen, Claus E. oth Enthalten in Elsevier Science Wang, Wei ELSEVIER Long-term Increase in Subfoveal Choroidal Thickness After Surgery for Senile Cataracts 2014 Amsterdam [u.a.] (DE-627)ELV012541583 volume:129 year:2019 pages:0 https://doi.org/10.1016/j.radmeas.2019.106200 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U 83.00 Volkswirtschaft: Allgemeines VZ 85.00 Betriebswirtschaft: Allgemeines VZ 83.11 Mikroökonomie VZ AR 129 2019 0 |
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10.1016/j.radmeas.2019.106200 doi /cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000000823.pica (DE-627)ELV048613843 (ELSEVIER)S1350-4487(19)30486-X DE-627 ger DE-627 rakwb eng 610 VZ 300 330 VZ 83.00 bkl 85.00 bkl 83.11 bkl Santurio, Grichar Valdes verfasserin aut Quantifying the ionization quenching effect in organic plastic scintillators used in MV photon dosimetry 2019transfer abstract nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Miniature organic plastic scintillators attached to optical fiber cables have found important uses in medical dosimetry, in particular for small-field dosimetry and field output factor measurements in megavoltage linear accelerator beams. Plastic scintillators are well suited for these applications due to their high degree of water equivalence and their small size. Plastic scintillators, however, are known to suffer from ionization quenching, meaning that the light production per absorbed dose decreases if the dose deposition is caused by low energy electrons. As MV beams also lead to dose deposition by low energy electrons, ionization quenching will also affect, for example, field output factor measurements in MV beams if the fraction of dose delivered by low energy electrons changes with field size or beam quality. While the influence of ionization quenching on scintillator dosimetry in beams of heavy charge particles or kV x-ray has been subject to much research, the effect in MV beams is less well studied, and it is often implicitly assumed that there is no effect. The purpose of this work therefore was to quantify the influence of ionization quenching on plastic scintillators, specifically BCF-60, for the two application in MV photon dosimetry: (i) field output factor measurements for field sizes from 0.5 × 0.5 cm 2 to 10 × 10 cm 2 for a 6 MV beam and (ii) ionization chambers beam quality correction factor ( k Q -factors) measurements for beams between 4 MV and 15 MV at a fixed 10 × 10 cm 2 field size. The quenching was quantified using Monte Carlo modelling of the MV beams, a variation of Birks formalism that accounted for the detailed dose deposition by secondary electrons, and quenching parameters established previously using experiments in kV x-ray beams. This enabled the computation of the light yield in a “quenching free” scintillator and therefore a computation of a correction factor due to ionization quenching. Ionization quenching was found to have a small but statistically significant influence on both of the studied applications: ( 0.6 ± 0.2 ) % for the field output factor measurements between 0.5 × 0.5 cm 2 and 10 × 10 cm 2 and about ( 2 ± 0.4 ) % for the k Q -factor application for beams between 4 MV and 15 MV. The modelling results were in agreement with experimental measurements. The results support that the ionization quenching effect has a small effect on field-output factor measurements and it can probably be neglected during cl... Miniature organic plastic scintillators attached to optical fiber cables have found important uses in medical dosimetry, in particular for small-field dosimetry and field output factor measurements in megavoltage linear accelerator beams. Plastic scintillators are well suited for these applications due to their high degree of water equivalence and their small size. Plastic scintillators, however, are known to suffer from ionization quenching, meaning that the light production per absorbed dose decreases if the dose deposition is caused by low energy electrons. As MV beams also lead to dose deposition by low energy electrons, ionization quenching will also affect, for example, field output factor measurements in MV beams if the fraction of dose delivered by low energy electrons changes with field size or beam quality. While the influence of ionization quenching on scintillator dosimetry in beams of heavy charge particles or kV x-ray has been subject to much research, the effect in MV beams is less well studied, and it is often implicitly assumed that there is no effect. The purpose of this work therefore was to quantify the influence of ionization quenching on plastic scintillators, specifically BCF-60, for the two application in MV photon dosimetry: (i) field output factor measurements for field sizes from 0.5 × 0.5 cm 2 to 10 × 10 cm 2 for a 6 MV beam and (ii) ionization chambers beam quality correction factor ( k Q -factors) measurements for beams between 4 MV and 15 MV at a fixed 10 × 10 cm 2 field size. The quenching was quantified using Monte Carlo modelling of the MV beams, a variation of Birks formalism that accounted for the detailed dose deposition by secondary electrons, and quenching parameters established previously using experiments in kV x-ray beams. This enabled the computation of the light yield in a “quenching free” scintillator and therefore a computation of a correction factor due to ionization quenching. Ionization quenching was found to have a small but statistically significant influence on both of the studied applications: ( 0.6 ± 0.2 ) % for the field output factor measurements between 0.5 × 0.5 cm 2 and 10 × 10 cm 2 and about ( 2 ± 0.4 ) % for the k Q -factor application for beams between 4 MV and 15 MV. The modelling results were in agreement with experimental measurements. The results support that the ionization quenching effect has a small effect on field-output factor measurements and it can probably be neglected during cl... Ionization quenching correction factor Elsevier Monte Carlo Elsevier Beam quality correction factor Elsevier Ionization quenching effect Elsevier Output Factor Elsevier Andersen, Claus E. oth Enthalten in Elsevier Science Wang, Wei ELSEVIER Long-term Increase in Subfoveal Choroidal Thickness After Surgery for Senile Cataracts 2014 Amsterdam [u.a.] (DE-627)ELV012541583 volume:129 year:2019 pages:0 https://doi.org/10.1016/j.radmeas.2019.106200 Volltext GBV_USEFLAG_U GBV_ELV SYSFLAG_U 83.00 Volkswirtschaft: Allgemeines VZ 85.00 Betriebswirtschaft: Allgemeines VZ 83.11 Mikroökonomie VZ AR 129 2019 0 |
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Quantifying the ionization quenching effect in organic plastic scintillators used in MV photon dosimetry |
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Miniature organic plastic scintillators attached to optical fiber cables have found important uses in medical dosimetry, in particular for small-field dosimetry and field output factor measurements in megavoltage linear accelerator beams. Plastic scintillators are well suited for these applications due to their high degree of water equivalence and their small size. Plastic scintillators, however, are known to suffer from ionization quenching, meaning that the light production per absorbed dose decreases if the dose deposition is caused by low energy electrons. As MV beams also lead to dose deposition by low energy electrons, ionization quenching will also affect, for example, field output factor measurements in MV beams if the fraction of dose delivered by low energy electrons changes with field size or beam quality. While the influence of ionization quenching on scintillator dosimetry in beams of heavy charge particles or kV x-ray has been subject to much research, the effect in MV beams is less well studied, and it is often implicitly assumed that there is no effect. The purpose of this work therefore was to quantify the influence of ionization quenching on plastic scintillators, specifically BCF-60, for the two application in MV photon dosimetry: (i) field output factor measurements for field sizes from 0.5 × 0.5 cm 2 to 10 × 10 cm 2 for a 6 MV beam and (ii) ionization chambers beam quality correction factor ( k Q -factors) measurements for beams between 4 MV and 15 MV at a fixed 10 × 10 cm 2 field size. The quenching was quantified using Monte Carlo modelling of the MV beams, a variation of Birks formalism that accounted for the detailed dose deposition by secondary electrons, and quenching parameters established previously using experiments in kV x-ray beams. This enabled the computation of the light yield in a “quenching free” scintillator and therefore a computation of a correction factor due to ionization quenching. Ionization quenching was found to have a small but statistically significant influence on both of the studied applications: ( 0.6 ± 0.2 ) % for the field output factor measurements between 0.5 × 0.5 cm 2 and 10 × 10 cm 2 and about ( 2 ± 0.4 ) % for the k Q -factor application for beams between 4 MV and 15 MV. The modelling results were in agreement with experimental measurements. The results support that the ionization quenching effect has a small effect on field-output factor measurements and it can probably be neglected during cl... |
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Miniature organic plastic scintillators attached to optical fiber cables have found important uses in medical dosimetry, in particular for small-field dosimetry and field output factor measurements in megavoltage linear accelerator beams. Plastic scintillators are well suited for these applications due to their high degree of water equivalence and their small size. Plastic scintillators, however, are known to suffer from ionization quenching, meaning that the light production per absorbed dose decreases if the dose deposition is caused by low energy electrons. As MV beams also lead to dose deposition by low energy electrons, ionization quenching will also affect, for example, field output factor measurements in MV beams if the fraction of dose delivered by low energy electrons changes with field size or beam quality. While the influence of ionization quenching on scintillator dosimetry in beams of heavy charge particles or kV x-ray has been subject to much research, the effect in MV beams is less well studied, and it is often implicitly assumed that there is no effect. The purpose of this work therefore was to quantify the influence of ionization quenching on plastic scintillators, specifically BCF-60, for the two application in MV photon dosimetry: (i) field output factor measurements for field sizes from 0.5 × 0.5 cm 2 to 10 × 10 cm 2 for a 6 MV beam and (ii) ionization chambers beam quality correction factor ( k Q -factors) measurements for beams between 4 MV and 15 MV at a fixed 10 × 10 cm 2 field size. The quenching was quantified using Monte Carlo modelling of the MV beams, a variation of Birks formalism that accounted for the detailed dose deposition by secondary electrons, and quenching parameters established previously using experiments in kV x-ray beams. This enabled the computation of the light yield in a “quenching free” scintillator and therefore a computation of a correction factor due to ionization quenching. Ionization quenching was found to have a small but statistically significant influence on both of the studied applications: ( 0.6 ± 0.2 ) % for the field output factor measurements between 0.5 × 0.5 cm 2 and 10 × 10 cm 2 and about ( 2 ± 0.4 ) % for the k Q -factor application for beams between 4 MV and 15 MV. The modelling results were in agreement with experimental measurements. The results support that the ionization quenching effect has a small effect on field-output factor measurements and it can probably be neglected during cl... |
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Miniature organic plastic scintillators attached to optical fiber cables have found important uses in medical dosimetry, in particular for small-field dosimetry and field output factor measurements in megavoltage linear accelerator beams. Plastic scintillators are well suited for these applications due to their high degree of water equivalence and their small size. Plastic scintillators, however, are known to suffer from ionization quenching, meaning that the light production per absorbed dose decreases if the dose deposition is caused by low energy electrons. As MV beams also lead to dose deposition by low energy electrons, ionization quenching will also affect, for example, field output factor measurements in MV beams if the fraction of dose delivered by low energy electrons changes with field size or beam quality. While the influence of ionization quenching on scintillator dosimetry in beams of heavy charge particles or kV x-ray has been subject to much research, the effect in MV beams is less well studied, and it is often implicitly assumed that there is no effect. The purpose of this work therefore was to quantify the influence of ionization quenching on plastic scintillators, specifically BCF-60, for the two application in MV photon dosimetry: (i) field output factor measurements for field sizes from 0.5 × 0.5 cm 2 to 10 × 10 cm 2 for a 6 MV beam and (ii) ionization chambers beam quality correction factor ( k Q -factors) measurements for beams between 4 MV and 15 MV at a fixed 10 × 10 cm 2 field size. The quenching was quantified using Monte Carlo modelling of the MV beams, a variation of Birks formalism that accounted for the detailed dose deposition by secondary electrons, and quenching parameters established previously using experiments in kV x-ray beams. This enabled the computation of the light yield in a “quenching free” scintillator and therefore a computation of a correction factor due to ionization quenching. Ionization quenching was found to have a small but statistically significant influence on both of the studied applications: ( 0.6 ± 0.2 ) % for the field output factor measurements between 0.5 × 0.5 cm 2 and 10 × 10 cm 2 and about ( 2 ± 0.4 ) % for the k Q -factor application for beams between 4 MV and 15 MV. The modelling results were in agreement with experimental measurements. The results support that the ionization quenching effect has a small effect on field-output factor measurements and it can probably be neglected during cl... |
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<?xml version="1.0" encoding="UTF-8"?><collection xmlns="http://www.loc.gov/MARC21/slim"><record><leader>01000caa a22002652 4500</leader><controlfield tag="001">ELV048613843</controlfield><controlfield tag="003">DE-627</controlfield><controlfield tag="005">20230626022405.0</controlfield><controlfield tag="007">cr uuu---uuuuu</controlfield><controlfield tag="008">200108s2019 xx |||||o 00| ||eng c</controlfield><datafield tag="024" ind1="7" ind2=" "><subfield code="a">10.1016/j.radmeas.2019.106200</subfield><subfield code="2">doi</subfield></datafield><datafield tag="028" ind1="5" ind2="2"><subfield code="a">/cbs_pica/cbs_olc/import_discovery/elsevier/einzuspielen/GBV00000000000823.pica</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(DE-627)ELV048613843</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(ELSEVIER)S1350-4487(19)30486-X</subfield></datafield><datafield tag="040" ind1=" " ind2=" "><subfield code="a">DE-627</subfield><subfield code="b">ger</subfield><subfield code="c">DE-627</subfield><subfield code="e">rakwb</subfield></datafield><datafield tag="041" ind1=" " ind2=" "><subfield code="a">eng</subfield></datafield><datafield tag="082" ind1="0" ind2="4"><subfield code="a">610</subfield><subfield code="q">VZ</subfield></datafield><datafield tag="082" ind1="0" ind2="4"><subfield code="a">300</subfield><subfield code="a">330</subfield><subfield code="q">VZ</subfield></datafield><datafield tag="084" ind1=" " ind2=" "><subfield code="a">83.00</subfield><subfield code="2">bkl</subfield></datafield><datafield tag="084" ind1=" " ind2=" "><subfield code="a">85.00</subfield><subfield code="2">bkl</subfield></datafield><datafield tag="084" ind1=" " ind2=" "><subfield code="a">83.11</subfield><subfield code="2">bkl</subfield></datafield><datafield tag="100" ind1="1" ind2=" "><subfield code="a">Santurio, Grichar Valdes</subfield><subfield code="e">verfasserin</subfield><subfield code="4">aut</subfield></datafield><datafield tag="245" ind1="1" ind2="0"><subfield code="a">Quantifying the ionization quenching effect in organic plastic scintillators used in MV photon dosimetry</subfield></datafield><datafield tag="264" ind1=" " ind2="1"><subfield code="c">2019transfer abstract</subfield></datafield><datafield tag="336" ind1=" " ind2=" "><subfield code="a">nicht spezifiziert</subfield><subfield code="b">zzz</subfield><subfield code="2">rdacontent</subfield></datafield><datafield tag="337" ind1=" " ind2=" "><subfield code="a">nicht spezifiziert</subfield><subfield code="b">z</subfield><subfield code="2">rdamedia</subfield></datafield><datafield tag="338" ind1=" " ind2=" "><subfield code="a">nicht spezifiziert</subfield><subfield code="b">zu</subfield><subfield code="2">rdacarrier</subfield></datafield><datafield tag="520" ind1=" " ind2=" "><subfield code="a">Miniature organic plastic scintillators attached to optical fiber cables have found important uses in medical dosimetry, in particular for small-field dosimetry and field output factor measurements in megavoltage linear accelerator beams. Plastic scintillators are well suited for these applications due to their high degree of water equivalence and their small size. Plastic scintillators, however, are known to suffer from ionization quenching, meaning that the light production per absorbed dose decreases if the dose deposition is caused by low energy electrons. As MV beams also lead to dose deposition by low energy electrons, ionization quenching will also affect, for example, field output factor measurements in MV beams if the fraction of dose delivered by low energy electrons changes with field size or beam quality. While the influence of ionization quenching on scintillator dosimetry in beams of heavy charge particles or kV x-ray has been subject to much research, the effect in MV beams is less well studied, and it is often implicitly assumed that there is no effect. The purpose of this work therefore was to quantify the influence of ionization quenching on plastic scintillators, specifically BCF-60, for the two application in MV photon dosimetry: (i) field output factor measurements for field sizes from 0.5 × 0.5 cm 2 to 10 × 10 cm 2 for a 6 MV beam and (ii) ionization chambers beam quality correction factor ( k Q -factors) measurements for beams between 4 MV and 15 MV at a fixed 10 × 10 cm 2 field size. The quenching was quantified using Monte Carlo modelling of the MV beams, a variation of Birks formalism that accounted for the detailed dose deposition by secondary electrons, and quenching parameters established previously using experiments in kV x-ray beams. This enabled the computation of the light yield in a “quenching free” scintillator and therefore a computation of a correction factor due to ionization quenching. Ionization quenching was found to have a small but statistically significant influence on both of the studied applications: ( 0.6 ± 0.2 ) % for the field output factor measurements between 0.5 × 0.5 cm 2 and 10 × 10 cm 2 and about ( 2 ± 0.4 ) % for the k Q -factor application for beams between 4 MV and 15 MV. The modelling results were in agreement with experimental measurements. The results support that the ionization quenching effect has a small effect on field-output factor measurements and it can probably be neglected during cl...</subfield></datafield><datafield tag="520" ind1=" " ind2=" "><subfield code="a">Miniature organic plastic scintillators attached to optical fiber cables have found important uses in medical dosimetry, in particular for small-field dosimetry and field output factor measurements in megavoltage linear accelerator beams. Plastic scintillators are well suited for these applications due to their high degree of water equivalence and their small size. Plastic scintillators, however, are known to suffer from ionization quenching, meaning that the light production per absorbed dose decreases if the dose deposition is caused by low energy electrons. As MV beams also lead to dose deposition by low energy electrons, ionization quenching will also affect, for example, field output factor measurements in MV beams if the fraction of dose delivered by low energy electrons changes with field size or beam quality. While the influence of ionization quenching on scintillator dosimetry in beams of heavy charge particles or kV x-ray has been subject to much research, the effect in MV beams is less well studied, and it is often implicitly assumed that there is no effect. The purpose of this work therefore was to quantify the influence of ionization quenching on plastic scintillators, specifically BCF-60, for the two application in MV photon dosimetry: (i) field output factor measurements for field sizes from 0.5 × 0.5 cm 2 to 10 × 10 cm 2 for a 6 MV beam and (ii) ionization chambers beam quality correction factor ( k Q -factors) measurements for beams between 4 MV and 15 MV at a fixed 10 × 10 cm 2 field size. The quenching was quantified using Monte Carlo modelling of the MV beams, a variation of Birks formalism that accounted for the detailed dose deposition by secondary electrons, and quenching parameters established previously using experiments in kV x-ray beams. This enabled the computation of the light yield in a “quenching free” scintillator and therefore a computation of a correction factor due to ionization quenching. Ionization quenching was found to have a small but statistically significant influence on both of the studied applications: ( 0.6 ± 0.2 ) % for the field output factor measurements between 0.5 × 0.5 cm 2 and 10 × 10 cm 2 and about ( 2 ± 0.4 ) % for the k Q -factor application for beams between 4 MV and 15 MV. The modelling results were in agreement with experimental measurements. The results support that the ionization quenching effect has a small effect on field-output factor measurements and it can probably be neglected during cl...</subfield></datafield><datafield tag="650" ind1=" " ind2="7"><subfield code="a">Ionization quenching correction factor</subfield><subfield code="2">Elsevier</subfield></datafield><datafield tag="650" ind1=" " ind2="7"><subfield code="a">Monte Carlo</subfield><subfield code="2">Elsevier</subfield></datafield><datafield tag="650" ind1=" " ind2="7"><subfield code="a">Beam quality correction factor</subfield><subfield code="2">Elsevier</subfield></datafield><datafield tag="650" ind1=" " ind2="7"><subfield code="a">Ionization quenching effect</subfield><subfield code="2">Elsevier</subfield></datafield><datafield tag="650" ind1=" " ind2="7"><subfield code="a">Output Factor</subfield><subfield code="2">Elsevier</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Andersen, Claus E.</subfield><subfield code="4">oth</subfield></datafield><datafield tag="773" ind1="0" ind2="8"><subfield code="i">Enthalten in</subfield><subfield code="n">Elsevier Science</subfield><subfield code="a">Wang, Wei ELSEVIER</subfield><subfield code="t">Long-term Increase in Subfoveal Choroidal Thickness After Surgery for Senile Cataracts</subfield><subfield code="d">2014</subfield><subfield code="g">Amsterdam [u.a.]</subfield><subfield code="w">(DE-627)ELV012541583</subfield></datafield><datafield tag="773" ind1="1" ind2="8"><subfield code="g">volume:129</subfield><subfield code="g">year:2019</subfield><subfield code="g">pages:0</subfield></datafield><datafield tag="856" ind1="4" ind2="0"><subfield code="u">https://doi.org/10.1016/j.radmeas.2019.106200</subfield><subfield code="3">Volltext</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_USEFLAG_U</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">GBV_ELV</subfield></datafield><datafield tag="912" ind1=" " ind2=" "><subfield code="a">SYSFLAG_U</subfield></datafield><datafield tag="936" ind1="b" ind2="k"><subfield code="a">83.00</subfield><subfield code="j">Volkswirtschaft: Allgemeines</subfield><subfield code="q">VZ</subfield></datafield><datafield tag="936" ind1="b" ind2="k"><subfield code="a">85.00</subfield><subfield code="j">Betriebswirtschaft: Allgemeines</subfield><subfield code="q">VZ</subfield></datafield><datafield tag="936" ind1="b" ind2="k"><subfield code="a">83.11</subfield><subfield code="j">Mikroökonomie</subfield><subfield code="q">VZ</subfield></datafield><datafield tag="951" ind1=" " ind2=" "><subfield code="a">AR</subfield></datafield><datafield tag="952" ind1=" " ind2=" "><subfield code="d">129</subfield><subfield code="j">2019</subfield><subfield code="h">0</subfield></datafield></record></collection>
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