Examination of conversion method of dose distribution of lung cancer IMRT using fluence reversible calculation function in O-ring type linac and C-type linac
Abstract Generally, converting irradiation plans between C-arm linacs (C-linac) when the linac fails is possible without recalculating the dose distribution using a treatment planning system (TPS), because they have similar mechanical structure. However, the O-ring-type linac (O-linac) differs from...
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| Autor*in: |
Rachi, Toshiya [verfasserIn] |
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| Format: |
E-Artikel |
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| Sprache: |
Englisch |
| Erschienen: |
2022 |
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| Schlagwörter: |
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| Anmerkung: |
© The Author(s) 2022 |
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| Übergeordnetes Werk: |
Enthalten in: Australasian physical & engineering sciences in medicine - Cham : Springer, 2001, 45(2022), 2 vom: 19. Apr., Seite 559-567 |
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| Übergeordnetes Werk: |
volume:45 ; year:2022 ; number:2 ; day:19 ; month:04 ; pages:559-567 |
| Links: |
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| DOI / URN: |
10.1007/s13246-022-01122-6 |
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SPR047439351 |
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| 520 | |a Abstract Generally, converting irradiation plans between C-arm linacs (C-linac) when the linac fails is possible without recalculating the dose distribution using a treatment planning system (TPS), because they have similar mechanical structure. However, the O-ring-type linac (O-linac) differs from the C-linac in forming the dose distribution. Therefore, if O-linac breaks down, it is necessary to formulate a treatment plan from scratch. In this study, we investigated a method for converting irradiation from an O-linac to a C-linac. Thirty patients with lung cancer who underwent volumetric-modulated arc therapy with an O-linac were included in this study. The O-linac dose distribution was converted into energy fluence by the function of the TPS. The alternative linac multi-leaf collimator (MLC) was then optimized to achieve energy fluence. The homogeneity index, conformity index, and planning treatment volume (D95%, D2%) of the converted plan were compared with the original plan. For organ at risk (OAR), the dose-volume histograms (DVHs) of the lung, esophagus, heart, and spinal cord were evaluated. Additionally, the shapes of the isodose curves were compared using the Dice similarity coefficient (DSC). There was no significant difference between the target and OARs (p > 0.05). The mean DSCs of 30% to 100% isodose curves of the prescribed dose and the isodose ≥ 105% and ≤ 20%were > 0.8 and < 0.8, respectively. Due to the structural differences of MLC, the dose-volume and generation positions were different in the dose range of ≥ 105% and ≤ 20%; hence, DSCs decreased. However, no statistically significant difference in the DVH was identified for either treatment plan. Based on this result, we propose a simple replanning method for performing MLC fitting after converting the dose to the energy fluence. | ||
| 650 | 4 | |a O-Ring Type Linac |7 (dpeaa)DE-He213 | |
| 650 | 4 | |a C-Type Linac |7 (dpeaa)DE-He213 | |
| 650 | 4 | |a Fluence Reversible Calculation |7 (dpeaa)DE-He213 | |
| 650 | 4 | |a Lung Cancer |7 (dpeaa)DE-He213 | |
| 700 | 1 | |a Parshuram, Raturi Vijay |4 aut | |
| 700 | 1 | |a Tanaka, Yuki |4 aut | |
| 700 | 1 | |a Togo, Haruki |4 aut | |
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10.1007/s13246-022-01122-6 doi (DE-627)SPR047439351 (SPR)s13246-022-01122-6-e DE-627 ger DE-627 rakwb eng Rachi, Toshiya verfasserin (orcid)0000-0002-7904-4027 aut Examination of conversion method of dose distribution of lung cancer IMRT using fluence reversible calculation function in O-ring type linac and C-type linac 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © The Author(s) 2022 Abstract Generally, converting irradiation plans between C-arm linacs (C-linac) when the linac fails is possible without recalculating the dose distribution using a treatment planning system (TPS), because they have similar mechanical structure. However, the O-ring-type linac (O-linac) differs from the C-linac in forming the dose distribution. Therefore, if O-linac breaks down, it is necessary to formulate a treatment plan from scratch. In this study, we investigated a method for converting irradiation from an O-linac to a C-linac. Thirty patients with lung cancer who underwent volumetric-modulated arc therapy with an O-linac were included in this study. The O-linac dose distribution was converted into energy fluence by the function of the TPS. The alternative linac multi-leaf collimator (MLC) was then optimized to achieve energy fluence. The homogeneity index, conformity index, and planning treatment volume (D95%, D2%) of the converted plan were compared with the original plan. For organ at risk (OAR), the dose-volume histograms (DVHs) of the lung, esophagus, heart, and spinal cord were evaluated. Additionally, the shapes of the isodose curves were compared using the Dice similarity coefficient (DSC). There was no significant difference between the target and OARs (p > 0.05). The mean DSCs of 30% to 100% isodose curves of the prescribed dose and the isodose ≥ 105% and ≤ 20%were > 0.8 and < 0.8, respectively. Due to the structural differences of MLC, the dose-volume and generation positions were different in the dose range of ≥ 105% and ≤ 20%; hence, DSCs decreased. However, no statistically significant difference in the DVH was identified for either treatment plan. Based on this result, we propose a simple replanning method for performing MLC fitting after converting the dose to the energy fluence. O-Ring Type Linac (dpeaa)DE-He213 C-Type Linac (dpeaa)DE-He213 Fluence Reversible Calculation (dpeaa)DE-He213 Lung Cancer (dpeaa)DE-He213 Parshuram, Raturi Vijay aut Tanaka, Yuki aut Togo, Haruki aut Enthalten in Australasian physical & engineering sciences in medicine Cham : Springer, 2001 45(2022), 2 vom: 19. Apr., Seite 559-567 (DE-627)320430707 (DE-600)2003728-4 1879-5447 nnns volume:45 year:2022 number:2 day:19 month:04 pages:559-567 https://dx.doi.org/10.1007/s13246-022-01122-6 kostenfrei Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA GBV_ILN_120 GBV_ILN_150 GBV_ILN_2188 GBV_ILN_2336 GBV_ILN_2472 GBV_ILN_2522 GBV_ILN_4246 AR 45 2022 2 19 04 559-567 |
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10.1007/s13246-022-01122-6 doi (DE-627)SPR047439351 (SPR)s13246-022-01122-6-e DE-627 ger DE-627 rakwb eng Rachi, Toshiya verfasserin (orcid)0000-0002-7904-4027 aut Examination of conversion method of dose distribution of lung cancer IMRT using fluence reversible calculation function in O-ring type linac and C-type linac 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © The Author(s) 2022 Abstract Generally, converting irradiation plans between C-arm linacs (C-linac) when the linac fails is possible without recalculating the dose distribution using a treatment planning system (TPS), because they have similar mechanical structure. However, the O-ring-type linac (O-linac) differs from the C-linac in forming the dose distribution. Therefore, if O-linac breaks down, it is necessary to formulate a treatment plan from scratch. In this study, we investigated a method for converting irradiation from an O-linac to a C-linac. Thirty patients with lung cancer who underwent volumetric-modulated arc therapy with an O-linac were included in this study. The O-linac dose distribution was converted into energy fluence by the function of the TPS. The alternative linac multi-leaf collimator (MLC) was then optimized to achieve energy fluence. The homogeneity index, conformity index, and planning treatment volume (D95%, D2%) of the converted plan were compared with the original plan. For organ at risk (OAR), the dose-volume histograms (DVHs) of the lung, esophagus, heart, and spinal cord were evaluated. Additionally, the shapes of the isodose curves were compared using the Dice similarity coefficient (DSC). There was no significant difference between the target and OARs (p > 0.05). The mean DSCs of 30% to 100% isodose curves of the prescribed dose and the isodose ≥ 105% and ≤ 20%were > 0.8 and < 0.8, respectively. Due to the structural differences of MLC, the dose-volume and generation positions were different in the dose range of ≥ 105% and ≤ 20%; hence, DSCs decreased. However, no statistically significant difference in the DVH was identified for either treatment plan. Based on this result, we propose a simple replanning method for performing MLC fitting after converting the dose to the energy fluence. O-Ring Type Linac (dpeaa)DE-He213 C-Type Linac (dpeaa)DE-He213 Fluence Reversible Calculation (dpeaa)DE-He213 Lung Cancer (dpeaa)DE-He213 Parshuram, Raturi Vijay aut Tanaka, Yuki aut Togo, Haruki aut Enthalten in Australasian physical & engineering sciences in medicine Cham : Springer, 2001 45(2022), 2 vom: 19. Apr., Seite 559-567 (DE-627)320430707 (DE-600)2003728-4 1879-5447 nnns volume:45 year:2022 number:2 day:19 month:04 pages:559-567 https://dx.doi.org/10.1007/s13246-022-01122-6 kostenfrei Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA GBV_ILN_120 GBV_ILN_150 GBV_ILN_2188 GBV_ILN_2336 GBV_ILN_2472 GBV_ILN_2522 GBV_ILN_4246 AR 45 2022 2 19 04 559-567 |
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10.1007/s13246-022-01122-6 doi (DE-627)SPR047439351 (SPR)s13246-022-01122-6-e DE-627 ger DE-627 rakwb eng Rachi, Toshiya verfasserin (orcid)0000-0002-7904-4027 aut Examination of conversion method of dose distribution of lung cancer IMRT using fluence reversible calculation function in O-ring type linac and C-type linac 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © The Author(s) 2022 Abstract Generally, converting irradiation plans between C-arm linacs (C-linac) when the linac fails is possible without recalculating the dose distribution using a treatment planning system (TPS), because they have similar mechanical structure. However, the O-ring-type linac (O-linac) differs from the C-linac in forming the dose distribution. Therefore, if O-linac breaks down, it is necessary to formulate a treatment plan from scratch. In this study, we investigated a method for converting irradiation from an O-linac to a C-linac. Thirty patients with lung cancer who underwent volumetric-modulated arc therapy with an O-linac were included in this study. The O-linac dose distribution was converted into energy fluence by the function of the TPS. The alternative linac multi-leaf collimator (MLC) was then optimized to achieve energy fluence. The homogeneity index, conformity index, and planning treatment volume (D95%, D2%) of the converted plan were compared with the original plan. For organ at risk (OAR), the dose-volume histograms (DVHs) of the lung, esophagus, heart, and spinal cord were evaluated. Additionally, the shapes of the isodose curves were compared using the Dice similarity coefficient (DSC). There was no significant difference between the target and OARs (p > 0.05). The mean DSCs of 30% to 100% isodose curves of the prescribed dose and the isodose ≥ 105% and ≤ 20%were > 0.8 and < 0.8, respectively. Due to the structural differences of MLC, the dose-volume and generation positions were different in the dose range of ≥ 105% and ≤ 20%; hence, DSCs decreased. However, no statistically significant difference in the DVH was identified for either treatment plan. Based on this result, we propose a simple replanning method for performing MLC fitting after converting the dose to the energy fluence. O-Ring Type Linac (dpeaa)DE-He213 C-Type Linac (dpeaa)DE-He213 Fluence Reversible Calculation (dpeaa)DE-He213 Lung Cancer (dpeaa)DE-He213 Parshuram, Raturi Vijay aut Tanaka, Yuki aut Togo, Haruki aut Enthalten in Australasian physical & engineering sciences in medicine Cham : Springer, 2001 45(2022), 2 vom: 19. Apr., Seite 559-567 (DE-627)320430707 (DE-600)2003728-4 1879-5447 nnns volume:45 year:2022 number:2 day:19 month:04 pages:559-567 https://dx.doi.org/10.1007/s13246-022-01122-6 kostenfrei Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA GBV_ILN_120 GBV_ILN_150 GBV_ILN_2188 GBV_ILN_2336 GBV_ILN_2472 GBV_ILN_2522 GBV_ILN_4246 AR 45 2022 2 19 04 559-567 |
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10.1007/s13246-022-01122-6 doi (DE-627)SPR047439351 (SPR)s13246-022-01122-6-e DE-627 ger DE-627 rakwb eng Rachi, Toshiya verfasserin (orcid)0000-0002-7904-4027 aut Examination of conversion method of dose distribution of lung cancer IMRT using fluence reversible calculation function in O-ring type linac and C-type linac 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © The Author(s) 2022 Abstract Generally, converting irradiation plans between C-arm linacs (C-linac) when the linac fails is possible without recalculating the dose distribution using a treatment planning system (TPS), because they have similar mechanical structure. However, the O-ring-type linac (O-linac) differs from the C-linac in forming the dose distribution. Therefore, if O-linac breaks down, it is necessary to formulate a treatment plan from scratch. In this study, we investigated a method for converting irradiation from an O-linac to a C-linac. Thirty patients with lung cancer who underwent volumetric-modulated arc therapy with an O-linac were included in this study. The O-linac dose distribution was converted into energy fluence by the function of the TPS. The alternative linac multi-leaf collimator (MLC) was then optimized to achieve energy fluence. The homogeneity index, conformity index, and planning treatment volume (D95%, D2%) of the converted plan were compared with the original plan. For organ at risk (OAR), the dose-volume histograms (DVHs) of the lung, esophagus, heart, and spinal cord were evaluated. Additionally, the shapes of the isodose curves were compared using the Dice similarity coefficient (DSC). There was no significant difference between the target and OARs (p > 0.05). The mean DSCs of 30% to 100% isodose curves of the prescribed dose and the isodose ≥ 105% and ≤ 20%were > 0.8 and < 0.8, respectively. Due to the structural differences of MLC, the dose-volume and generation positions were different in the dose range of ≥ 105% and ≤ 20%; hence, DSCs decreased. However, no statistically significant difference in the DVH was identified for either treatment plan. Based on this result, we propose a simple replanning method for performing MLC fitting after converting the dose to the energy fluence. O-Ring Type Linac (dpeaa)DE-He213 C-Type Linac (dpeaa)DE-He213 Fluence Reversible Calculation (dpeaa)DE-He213 Lung Cancer (dpeaa)DE-He213 Parshuram, Raturi Vijay aut Tanaka, Yuki aut Togo, Haruki aut Enthalten in Australasian physical & engineering sciences in medicine Cham : Springer, 2001 45(2022), 2 vom: 19. Apr., Seite 559-567 (DE-627)320430707 (DE-600)2003728-4 1879-5447 nnns volume:45 year:2022 number:2 day:19 month:04 pages:559-567 https://dx.doi.org/10.1007/s13246-022-01122-6 kostenfrei Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA GBV_ILN_120 GBV_ILN_150 GBV_ILN_2188 GBV_ILN_2336 GBV_ILN_2472 GBV_ILN_2522 GBV_ILN_4246 AR 45 2022 2 19 04 559-567 |
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10.1007/s13246-022-01122-6 doi (DE-627)SPR047439351 (SPR)s13246-022-01122-6-e DE-627 ger DE-627 rakwb eng Rachi, Toshiya verfasserin (orcid)0000-0002-7904-4027 aut Examination of conversion method of dose distribution of lung cancer IMRT using fluence reversible calculation function in O-ring type linac and C-type linac 2022 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier © The Author(s) 2022 Abstract Generally, converting irradiation plans between C-arm linacs (C-linac) when the linac fails is possible without recalculating the dose distribution using a treatment planning system (TPS), because they have similar mechanical structure. However, the O-ring-type linac (O-linac) differs from the C-linac in forming the dose distribution. Therefore, if O-linac breaks down, it is necessary to formulate a treatment plan from scratch. In this study, we investigated a method for converting irradiation from an O-linac to a C-linac. Thirty patients with lung cancer who underwent volumetric-modulated arc therapy with an O-linac were included in this study. The O-linac dose distribution was converted into energy fluence by the function of the TPS. The alternative linac multi-leaf collimator (MLC) was then optimized to achieve energy fluence. The homogeneity index, conformity index, and planning treatment volume (D95%, D2%) of the converted plan were compared with the original plan. For organ at risk (OAR), the dose-volume histograms (DVHs) of the lung, esophagus, heart, and spinal cord were evaluated. Additionally, the shapes of the isodose curves were compared using the Dice similarity coefficient (DSC). There was no significant difference between the target and OARs (p > 0.05). The mean DSCs of 30% to 100% isodose curves of the prescribed dose and the isodose ≥ 105% and ≤ 20%were > 0.8 and < 0.8, respectively. Due to the structural differences of MLC, the dose-volume and generation positions were different in the dose range of ≥ 105% and ≤ 20%; hence, DSCs decreased. However, no statistically significant difference in the DVH was identified for either treatment plan. Based on this result, we propose a simple replanning method for performing MLC fitting after converting the dose to the energy fluence. O-Ring Type Linac (dpeaa)DE-He213 C-Type Linac (dpeaa)DE-He213 Fluence Reversible Calculation (dpeaa)DE-He213 Lung Cancer (dpeaa)DE-He213 Parshuram, Raturi Vijay aut Tanaka, Yuki aut Togo, Haruki aut Enthalten in Australasian physical & engineering sciences in medicine Cham : Springer, 2001 45(2022), 2 vom: 19. Apr., Seite 559-567 (DE-627)320430707 (DE-600)2003728-4 1879-5447 nnns volume:45 year:2022 number:2 day:19 month:04 pages:559-567 https://dx.doi.org/10.1007/s13246-022-01122-6 kostenfrei Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA GBV_ILN_120 GBV_ILN_150 GBV_ILN_2188 GBV_ILN_2336 GBV_ILN_2472 GBV_ILN_2522 GBV_ILN_4246 AR 45 2022 2 19 04 559-567 |
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Rachi, Toshiya misc O-Ring Type Linac misc C-Type Linac misc Fluence Reversible Calculation misc Lung Cancer Examination of conversion method of dose distribution of lung cancer IMRT using fluence reversible calculation function in O-ring type linac and C-type linac |
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Examination of conversion method of dose distribution of lung cancer IMRT using fluence reversible calculation function in O-ring type linac and C-type linac O-Ring Type Linac (dpeaa)DE-He213 C-Type Linac (dpeaa)DE-He213 Fluence Reversible Calculation (dpeaa)DE-He213 Lung Cancer (dpeaa)DE-He213 |
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examination of conversion method of dose distribution of lung cancer imrt using fluence reversible calculation function in o-ring type linac and c-type linac |
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Examination of conversion method of dose distribution of lung cancer IMRT using fluence reversible calculation function in O-ring type linac and C-type linac |
| abstract |
Abstract Generally, converting irradiation plans between C-arm linacs (C-linac) when the linac fails is possible without recalculating the dose distribution using a treatment planning system (TPS), because they have similar mechanical structure. However, the O-ring-type linac (O-linac) differs from the C-linac in forming the dose distribution. Therefore, if O-linac breaks down, it is necessary to formulate a treatment plan from scratch. In this study, we investigated a method for converting irradiation from an O-linac to a C-linac. Thirty patients with lung cancer who underwent volumetric-modulated arc therapy with an O-linac were included in this study. The O-linac dose distribution was converted into energy fluence by the function of the TPS. The alternative linac multi-leaf collimator (MLC) was then optimized to achieve energy fluence. The homogeneity index, conformity index, and planning treatment volume (D95%, D2%) of the converted plan were compared with the original plan. For organ at risk (OAR), the dose-volume histograms (DVHs) of the lung, esophagus, heart, and spinal cord were evaluated. Additionally, the shapes of the isodose curves were compared using the Dice similarity coefficient (DSC). There was no significant difference between the target and OARs (p > 0.05). The mean DSCs of 30% to 100% isodose curves of the prescribed dose and the isodose ≥ 105% and ≤ 20%were > 0.8 and < 0.8, respectively. Due to the structural differences of MLC, the dose-volume and generation positions were different in the dose range of ≥ 105% and ≤ 20%; hence, DSCs decreased. However, no statistically significant difference in the DVH was identified for either treatment plan. Based on this result, we propose a simple replanning method for performing MLC fitting after converting the dose to the energy fluence. © The Author(s) 2022 |
| abstractGer |
Abstract Generally, converting irradiation plans between C-arm linacs (C-linac) when the linac fails is possible without recalculating the dose distribution using a treatment planning system (TPS), because they have similar mechanical structure. However, the O-ring-type linac (O-linac) differs from the C-linac in forming the dose distribution. Therefore, if O-linac breaks down, it is necessary to formulate a treatment plan from scratch. In this study, we investigated a method for converting irradiation from an O-linac to a C-linac. Thirty patients with lung cancer who underwent volumetric-modulated arc therapy with an O-linac were included in this study. The O-linac dose distribution was converted into energy fluence by the function of the TPS. The alternative linac multi-leaf collimator (MLC) was then optimized to achieve energy fluence. The homogeneity index, conformity index, and planning treatment volume (D95%, D2%) of the converted plan were compared with the original plan. For organ at risk (OAR), the dose-volume histograms (DVHs) of the lung, esophagus, heart, and spinal cord were evaluated. Additionally, the shapes of the isodose curves were compared using the Dice similarity coefficient (DSC). There was no significant difference between the target and OARs (p > 0.05). The mean DSCs of 30% to 100% isodose curves of the prescribed dose and the isodose ≥ 105% and ≤ 20%were > 0.8 and < 0.8, respectively. Due to the structural differences of MLC, the dose-volume and generation positions were different in the dose range of ≥ 105% and ≤ 20%; hence, DSCs decreased. However, no statistically significant difference in the DVH was identified for either treatment plan. Based on this result, we propose a simple replanning method for performing MLC fitting after converting the dose to the energy fluence. © The Author(s) 2022 |
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Abstract Generally, converting irradiation plans between C-arm linacs (C-linac) when the linac fails is possible without recalculating the dose distribution using a treatment planning system (TPS), because they have similar mechanical structure. However, the O-ring-type linac (O-linac) differs from the C-linac in forming the dose distribution. Therefore, if O-linac breaks down, it is necessary to formulate a treatment plan from scratch. In this study, we investigated a method for converting irradiation from an O-linac to a C-linac. Thirty patients with lung cancer who underwent volumetric-modulated arc therapy with an O-linac were included in this study. The O-linac dose distribution was converted into energy fluence by the function of the TPS. The alternative linac multi-leaf collimator (MLC) was then optimized to achieve energy fluence. The homogeneity index, conformity index, and planning treatment volume (D95%, D2%) of the converted plan were compared with the original plan. For organ at risk (OAR), the dose-volume histograms (DVHs) of the lung, esophagus, heart, and spinal cord were evaluated. Additionally, the shapes of the isodose curves were compared using the Dice similarity coefficient (DSC). There was no significant difference between the target and OARs (p > 0.05). The mean DSCs of 30% to 100% isodose curves of the prescribed dose and the isodose ≥ 105% and ≤ 20%were > 0.8 and < 0.8, respectively. Due to the structural differences of MLC, the dose-volume and generation positions were different in the dose range of ≥ 105% and ≤ 20%; hence, DSCs decreased. However, no statistically significant difference in the DVH was identified for either treatment plan. Based on this result, we propose a simple replanning method for performing MLC fitting after converting the dose to the energy fluence. © The Author(s) 2022 |
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