Clinical target volume in postoperative radiotherapy for gastric cancer: identification of major difficulties and controversies

Purpose To identify the main difficulties in postoperative clinical target volume (CTV) delineation in gastric cancer (GC). Methods Before and after a training course, 20 radiation oncology residents were asked to delineate the CTV for the postoperative GC case on four computed tomography scans: dom...
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Autor*in:	Socha, J. [verfasserIn] Wołąkiewicz, G. [verfasserIn] Wasilewska-Teśluk, E. [verfasserIn] Janiga, P. [verfasserIn] Kondraciuk, T. [verfasserIn] Majewska, A. [verfasserIn] Olearski, K. [verfasserIn] Kępka, L. [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2015

Schlagwörter:	Adjuvant radiotherapy Gastric cancer Interobserver variation Radiotherapy planning Volume delineation

Übergeordnetes Werk:	Enthalten in: Revista de oncología - Barcelona : Doyma, 2000, 18(2015), 5 vom: 27. Aug., Seite 480-488
Übergeordnetes Werk:	volume:18 ; year:2015 ; number:5 ; day:27 ; month:08 ; pages:480-488

Links:	Volltext

DOI / URN:	10.1007/s12094-015-1396-6

Katalog-ID:	SPR024264725

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520			\|a Purpose To identify the main difficulties in postoperative clinical target volume (CTV) delineation in gastric cancer (GC). Methods Before and after a training course, 20 radiation oncology residents were asked to delineate the CTV for the postoperative GC case on four computed tomography scans: dome of the diaphragm, anterior abdominal wall, duodenal stump and porta hepatis level, and to determine the lower CTV border. CTV volume was reconstructed from requested planar contours. Area of intersection (AI) for each requested scan and volume of intersection (VI), defined as the overlap of delineated area/volume with respective reference area (RA)/reference volume (RV) proposed by the senior radiation oncologist, were computed. The degree of agreement between the reference and participants’ contours was quantified using the Concordance Index (CI): AI/RA × 100 % or VI/RV × 100 %. The lower CTV border was analyzed separately. Pre- and post-training CIs were compared. A questionnaire investigated the difficulties with contouring. Results Mean CI value was the lowest for the dome of the diaphragm (24 % pre-training, 35 % post-training) and for the duodenal stump (49 % pre-training, 61 % post-training). Mean CI for the CTV volume was 49 % pre-training and 59 % post-training, p = 0.39. Mean distance from the reference to the participants’ lower CTV borders was 2.73 cm pre-training and 2.0 cm post-training, p = 0.71. In a questionnaire, 75 % of respondents indicated the elective nodal area as the main difficulty. Conclusions Delineation of the dome of the diaphragm and the duodenal stump, as yet not recognized as the source of variation, should be addressed in the international consensus guidelines and clarified.
650		4	\|a Adjuvant radiotherapy \|7 (dpeaa)DE-He213
650		4	\|a Gastric cancer \|7 (dpeaa)DE-He213
650		4	\|a Interobserver variation \|7 (dpeaa)DE-He213
650		4	\|a Radiotherapy planning \|7 (dpeaa)DE-He213
650		4	\|a Volume delineation \|7 (dpeaa)DE-He213
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700	1		\|a Majewska, A. \|e verfasserin \|4 aut
700	1		\|a Olearski, K. \|e verfasserin \|4 aut
700	1		\|a Kępka, L. \|e verfasserin \|4 aut
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allfields	10.1007/s12094-015-1396-6 doi (DE-627)SPR024264725 (SPR)s12094-015-1396-6-e DE-627 ger DE-627 rakwb eng 610 ASE Socha, J. verfasserin aut Clinical target volume in postoperative radiotherapy for gastric cancer: identification of major difficulties and controversies 2015 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Purpose To identify the main difficulties in postoperative clinical target volume (CTV) delineation in gastric cancer (GC). Methods Before and after a training course, 20 radiation oncology residents were asked to delineate the CTV for the postoperative GC case on four computed tomography scans: dome of the diaphragm, anterior abdominal wall, duodenal stump and porta hepatis level, and to determine the lower CTV border. CTV volume was reconstructed from requested planar contours. Area of intersection (AI) for each requested scan and volume of intersection (VI), defined as the overlap of delineated area/volume with respective reference area (RA)/reference volume (RV) proposed by the senior radiation oncologist, were computed. The degree of agreement between the reference and participants’ contours was quantified using the Concordance Index (CI): AI/RA × 100 % or VI/RV × 100 %. The lower CTV border was analyzed separately. Pre- and post-training CIs were compared. A questionnaire investigated the difficulties with contouring. Results Mean CI value was the lowest for the dome of the diaphragm (24 % pre-training, 35 % post-training) and for the duodenal stump (49 % pre-training, 61 % post-training). Mean CI for the CTV volume was 49 % pre-training and 59 % post-training, p = 0.39. Mean distance from the reference to the participants’ lower CTV borders was 2.73 cm pre-training and 2.0 cm post-training, p = 0.71. In a questionnaire, 75 % of respondents indicated the elective nodal area as the main difficulty. Conclusions Delineation of the dome of the diaphragm and the duodenal stump, as yet not recognized as the source of variation, should be addressed in the international consensus guidelines and clarified. Adjuvant radiotherapy (dpeaa)DE-He213 Gastric cancer (dpeaa)DE-He213 Interobserver variation (dpeaa)DE-He213 Radiotherapy planning (dpeaa)DE-He213 Volume delineation (dpeaa)DE-He213 Wołąkiewicz, G. verfasserin aut Wasilewska-Teśluk, E. verfasserin aut Janiga, P. verfasserin aut Kondraciuk, T. verfasserin aut Majewska, A. verfasserin aut Olearski, K. verfasserin aut Kępka, L. verfasserin aut Enthalten in Revista de oncología Barcelona : Doyma, 2000 18(2015), 5 vom: 27. Aug., Seite 480-488 (DE-627)385985452 (DE-600)2143451-7 1578-195X nnns volume:18 year:2015 number:5 day:27 month:08 pages:480-488 https://dx.doi.org/10.1007/s12094-015-1396-6 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_120 GBV_ILN_152 GBV_ILN_161 GBV_ILN_171 GBV_ILN_187 GBV_ILN_224 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 AR 18 2015 5 27 08 480-488
spelling	10.1007/s12094-015-1396-6 doi (DE-627)SPR024264725 (SPR)s12094-015-1396-6-e DE-627 ger DE-627 rakwb eng 610 ASE Socha, J. verfasserin aut Clinical target volume in postoperative radiotherapy for gastric cancer: identification of major difficulties and controversies 2015 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Purpose To identify the main difficulties in postoperative clinical target volume (CTV) delineation in gastric cancer (GC). Methods Before and after a training course, 20 radiation oncology residents were asked to delineate the CTV for the postoperative GC case on four computed tomography scans: dome of the diaphragm, anterior abdominal wall, duodenal stump and porta hepatis level, and to determine the lower CTV border. CTV volume was reconstructed from requested planar contours. Area of intersection (AI) for each requested scan and volume of intersection (VI), defined as the overlap of delineated area/volume with respective reference area (RA)/reference volume (RV) proposed by the senior radiation oncologist, were computed. The degree of agreement between the reference and participants’ contours was quantified using the Concordance Index (CI): AI/RA × 100 % or VI/RV × 100 %. The lower CTV border was analyzed separately. Pre- and post-training CIs were compared. A questionnaire investigated the difficulties with contouring. Results Mean CI value was the lowest for the dome of the diaphragm (24 % pre-training, 35 % post-training) and for the duodenal stump (49 % pre-training, 61 % post-training). Mean CI for the CTV volume was 49 % pre-training and 59 % post-training, p = 0.39. Mean distance from the reference to the participants’ lower CTV borders was 2.73 cm pre-training and 2.0 cm post-training, p = 0.71. In a questionnaire, 75 % of respondents indicated the elective nodal area as the main difficulty. Conclusions Delineation of the dome of the diaphragm and the duodenal stump, as yet not recognized as the source of variation, should be addressed in the international consensus guidelines and clarified. Adjuvant radiotherapy (dpeaa)DE-He213 Gastric cancer (dpeaa)DE-He213 Interobserver variation (dpeaa)DE-He213 Radiotherapy planning (dpeaa)DE-He213 Volume delineation (dpeaa)DE-He213 Wołąkiewicz, G. verfasserin aut Wasilewska-Teśluk, E. verfasserin aut Janiga, P. verfasserin aut Kondraciuk, T. verfasserin aut Majewska, A. verfasserin aut Olearski, K. verfasserin aut Kępka, L. verfasserin aut Enthalten in Revista de oncología Barcelona : Doyma, 2000 18(2015), 5 vom: 27. Aug., Seite 480-488 (DE-627)385985452 (DE-600)2143451-7 1578-195X nnns volume:18 year:2015 number:5 day:27 month:08 pages:480-488 https://dx.doi.org/10.1007/s12094-015-1396-6 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_120 GBV_ILN_152 GBV_ILN_161 GBV_ILN_171 GBV_ILN_187 GBV_ILN_224 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 AR 18 2015 5 27 08 480-488
allfields_unstemmed	10.1007/s12094-015-1396-6 doi (DE-627)SPR024264725 (SPR)s12094-015-1396-6-e DE-627 ger DE-627 rakwb eng 610 ASE Socha, J. verfasserin aut Clinical target volume in postoperative radiotherapy for gastric cancer: identification of major difficulties and controversies 2015 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Purpose To identify the main difficulties in postoperative clinical target volume (CTV) delineation in gastric cancer (GC). Methods Before and after a training course, 20 radiation oncology residents were asked to delineate the CTV for the postoperative GC case on four computed tomography scans: dome of the diaphragm, anterior abdominal wall, duodenal stump and porta hepatis level, and to determine the lower CTV border. CTV volume was reconstructed from requested planar contours. Area of intersection (AI) for each requested scan and volume of intersection (VI), defined as the overlap of delineated area/volume with respective reference area (RA)/reference volume (RV) proposed by the senior radiation oncologist, were computed. The degree of agreement between the reference and participants’ contours was quantified using the Concordance Index (CI): AI/RA × 100 % or VI/RV × 100 %. The lower CTV border was analyzed separately. Pre- and post-training CIs were compared. A questionnaire investigated the difficulties with contouring. Results Mean CI value was the lowest for the dome of the diaphragm (24 % pre-training, 35 % post-training) and for the duodenal stump (49 % pre-training, 61 % post-training). Mean CI for the CTV volume was 49 % pre-training and 59 % post-training, p = 0.39. Mean distance from the reference to the participants’ lower CTV borders was 2.73 cm pre-training and 2.0 cm post-training, p = 0.71. In a questionnaire, 75 % of respondents indicated the elective nodal area as the main difficulty. Conclusions Delineation of the dome of the diaphragm and the duodenal stump, as yet not recognized as the source of variation, should be addressed in the international consensus guidelines and clarified. Adjuvant radiotherapy (dpeaa)DE-He213 Gastric cancer (dpeaa)DE-He213 Interobserver variation (dpeaa)DE-He213 Radiotherapy planning (dpeaa)DE-He213 Volume delineation (dpeaa)DE-He213 Wołąkiewicz, G. verfasserin aut Wasilewska-Teśluk, E. verfasserin aut Janiga, P. verfasserin aut Kondraciuk, T. verfasserin aut Majewska, A. verfasserin aut Olearski, K. verfasserin aut Kępka, L. verfasserin aut Enthalten in Revista de oncología Barcelona : Doyma, 2000 18(2015), 5 vom: 27. Aug., Seite 480-488 (DE-627)385985452 (DE-600)2143451-7 1578-195X nnns volume:18 year:2015 number:5 day:27 month:08 pages:480-488 https://dx.doi.org/10.1007/s12094-015-1396-6 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_120 GBV_ILN_152 GBV_ILN_161 GBV_ILN_171 GBV_ILN_187 GBV_ILN_224 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 AR 18 2015 5 27 08 480-488
allfieldsGer	10.1007/s12094-015-1396-6 doi (DE-627)SPR024264725 (SPR)s12094-015-1396-6-e DE-627 ger DE-627 rakwb eng 610 ASE Socha, J. verfasserin aut Clinical target volume in postoperative radiotherapy for gastric cancer: identification of major difficulties and controversies 2015 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Purpose To identify the main difficulties in postoperative clinical target volume (CTV) delineation in gastric cancer (GC). Methods Before and after a training course, 20 radiation oncology residents were asked to delineate the CTV for the postoperative GC case on four computed tomography scans: dome of the diaphragm, anterior abdominal wall, duodenal stump and porta hepatis level, and to determine the lower CTV border. CTV volume was reconstructed from requested planar contours. Area of intersection (AI) for each requested scan and volume of intersection (VI), defined as the overlap of delineated area/volume with respective reference area (RA)/reference volume (RV) proposed by the senior radiation oncologist, were computed. The degree of agreement between the reference and participants’ contours was quantified using the Concordance Index (CI): AI/RA × 100 % or VI/RV × 100 %. The lower CTV border was analyzed separately. Pre- and post-training CIs were compared. A questionnaire investigated the difficulties with contouring. Results Mean CI value was the lowest for the dome of the diaphragm (24 % pre-training, 35 % post-training) and for the duodenal stump (49 % pre-training, 61 % post-training). Mean CI for the CTV volume was 49 % pre-training and 59 % post-training, p = 0.39. Mean distance from the reference to the participants’ lower CTV borders was 2.73 cm pre-training and 2.0 cm post-training, p = 0.71. In a questionnaire, 75 % of respondents indicated the elective nodal area as the main difficulty. Conclusions Delineation of the dome of the diaphragm and the duodenal stump, as yet not recognized as the source of variation, should be addressed in the international consensus guidelines and clarified. Adjuvant radiotherapy (dpeaa)DE-He213 Gastric cancer (dpeaa)DE-He213 Interobserver variation (dpeaa)DE-He213 Radiotherapy planning (dpeaa)DE-He213 Volume delineation (dpeaa)DE-He213 Wołąkiewicz, G. verfasserin aut Wasilewska-Teśluk, E. verfasserin aut Janiga, P. verfasserin aut Kondraciuk, T. verfasserin aut Majewska, A. verfasserin aut Olearski, K. verfasserin aut Kępka, L. verfasserin aut Enthalten in Revista de oncología Barcelona : Doyma, 2000 18(2015), 5 vom: 27. Aug., Seite 480-488 (DE-627)385985452 (DE-600)2143451-7 1578-195X nnns volume:18 year:2015 number:5 day:27 month:08 pages:480-488 https://dx.doi.org/10.1007/s12094-015-1396-6 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_120 GBV_ILN_152 GBV_ILN_161 GBV_ILN_171 GBV_ILN_187 GBV_ILN_224 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 AR 18 2015 5 27 08 480-488
allfieldsSound	10.1007/s12094-015-1396-6 doi (DE-627)SPR024264725 (SPR)s12094-015-1396-6-e DE-627 ger DE-627 rakwb eng 610 ASE Socha, J. verfasserin aut Clinical target volume in postoperative radiotherapy for gastric cancer: identification of major difficulties and controversies 2015 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier Purpose To identify the main difficulties in postoperative clinical target volume (CTV) delineation in gastric cancer (GC). Methods Before and after a training course, 20 radiation oncology residents were asked to delineate the CTV for the postoperative GC case on four computed tomography scans: dome of the diaphragm, anterior abdominal wall, duodenal stump and porta hepatis level, and to determine the lower CTV border. CTV volume was reconstructed from requested planar contours. Area of intersection (AI) for each requested scan and volume of intersection (VI), defined as the overlap of delineated area/volume with respective reference area (RA)/reference volume (RV) proposed by the senior radiation oncologist, were computed. The degree of agreement between the reference and participants’ contours was quantified using the Concordance Index (CI): AI/RA × 100 % or VI/RV × 100 %. The lower CTV border was analyzed separately. Pre- and post-training CIs were compared. A questionnaire investigated the difficulties with contouring. Results Mean CI value was the lowest for the dome of the diaphragm (24 % pre-training, 35 % post-training) and for the duodenal stump (49 % pre-training, 61 % post-training). Mean CI for the CTV volume was 49 % pre-training and 59 % post-training, p = 0.39. Mean distance from the reference to the participants’ lower CTV borders was 2.73 cm pre-training and 2.0 cm post-training, p = 0.71. In a questionnaire, 75 % of respondents indicated the elective nodal area as the main difficulty. Conclusions Delineation of the dome of the diaphragm and the duodenal stump, as yet not recognized as the source of variation, should be addressed in the international consensus guidelines and clarified. Adjuvant radiotherapy (dpeaa)DE-He213 Gastric cancer (dpeaa)DE-He213 Interobserver variation (dpeaa)DE-He213 Radiotherapy planning (dpeaa)DE-He213 Volume delineation (dpeaa)DE-He213 Wołąkiewicz, G. verfasserin aut Wasilewska-Teśluk, E. verfasserin aut Janiga, P. verfasserin aut Kondraciuk, T. verfasserin aut Majewska, A. verfasserin aut Olearski, K. verfasserin aut Kępka, L. verfasserin aut Enthalten in Revista de oncología Barcelona : Doyma, 2000 18(2015), 5 vom: 27. Aug., Seite 480-488 (DE-627)385985452 (DE-600)2143451-7 1578-195X nnns volume:18 year:2015 number:5 day:27 month:08 pages:480-488 https://dx.doi.org/10.1007/s12094-015-1396-6 lizenzpflichtig Volltext GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_120 GBV_ILN_152 GBV_ILN_161 GBV_ILN_171 GBV_ILN_187 GBV_ILN_224 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702 AR 18 2015 5 27 08 480-488
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Methods Before and after a training course, 20 radiation oncology residents were asked to delineate the CTV for the postoperative GC case on four computed tomography scans: dome of the diaphragm, anterior abdominal wall, duodenal stump and porta hepatis level, and to determine the lower CTV border. CTV volume was reconstructed from requested planar contours. Area of intersection (AI) for each requested scan and volume of intersection (VI), defined as the overlap of delineated area/volume with respective reference area (RA)/reference volume (RV) proposed by the senior radiation oncologist, were computed. The degree of agreement between the reference and participants’ contours was quantified using the Concordance Index (CI): AI/RA × 100 % or VI/RV × 100 %. The lower CTV border was analyzed separately. Pre- and post-training CIs were compared. A questionnaire investigated the difficulties with contouring. Results Mean CI value was the lowest for the dome of the diaphragm (24 % pre-training, 35 % post-training) and for the duodenal stump (49 % pre-training, 61 % post-training). Mean CI for the CTV volume was 49 % pre-training and 59 % post-training, p = 0.39. Mean distance from the reference to the participants’ lower CTV borders was 2.73 cm pre-training and 2.0 cm post-training, p = 0.71. In a questionnaire, 75 % of respondents indicated the elective nodal area as the main difficulty. Conclusions Delineation of the dome of the diaphragm and the duodenal stump, as yet not recognized as the source of variation, should be addressed in the international consensus guidelines and clarified.</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Adjuvant radiotherapy</subfield><subfield code="7">(dpeaa)DE-He213</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Gastric cancer</subfield><subfield code="7">(dpeaa)DE-He213</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Interobserver variation</subfield><subfield code="7">(dpeaa)DE-He213</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Radiotherapy planning</subfield><subfield code="7">(dpeaa)DE-He213</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Volume delineation</subfield><subfield code="7">(dpeaa)DE-He213</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Wołąkiewicz, G.</subfield><subfield code="e">verfasserin</subfield><subfield code="4">aut</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Wasilewska-Teśluk, E.</subfield><subfield code="e">verfasserin</subfield><subfield code="4">aut</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Janiga, P.</subfield><subfield code="e">verfasserin</subfield><subfield code="4">aut</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Kondraciuk, T.</subfield><subfield code="e">verfasserin</subfield><subfield code="4">aut</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Majewska, A.</subfield><subfield code="e">verfasserin</subfield><subfield code="4">aut</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Olearski, K.</subfield><subfield code="e">verfasserin</subfield><subfield code="4">aut</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Kępka, L.</subfield><subfield code="e">verfasserin</subfield><subfield code="4">aut</subfield></datafield><datafield tag="773" ind1="0" ind2="8"><subfield code="i">Enthalten in</subfield><subfield code="t">Revista de oncología</subfield><subfield code="d">Barcelona : Doyma, 2000</subfield><subfield code="g">18(2015), 5 vom: 27. 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author	Socha, J.
spellingShingle	Socha, J. ddc 610 misc Adjuvant radiotherapy misc Gastric cancer misc Interobserver variation misc Radiotherapy planning misc Volume delineation Clinical target volume in postoperative radiotherapy for gastric cancer: identification of major difficulties and controversies
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topic_title	610 ASE Clinical target volume in postoperative radiotherapy for gastric cancer: identification of major difficulties and controversies Adjuvant radiotherapy (dpeaa)DE-He213 Gastric cancer (dpeaa)DE-He213 Interobserver variation (dpeaa)DE-He213 Radiotherapy planning (dpeaa)DE-He213 Volume delineation (dpeaa)DE-He213
topic	ddc 610 misc Adjuvant radiotherapy misc Gastric cancer misc Interobserver variation misc Radiotherapy planning misc Volume delineation
topic_unstemmed	ddc 610 misc Adjuvant radiotherapy misc Gastric cancer misc Interobserver variation misc Radiotherapy planning misc Volume delineation
topic_browse	ddc 610 misc Adjuvant radiotherapy misc Gastric cancer misc Interobserver variation misc Radiotherapy planning misc Volume delineation
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title	Clinical target volume in postoperative radiotherapy for gastric cancer: identification of major difficulties and controversies
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title_full	Clinical target volume in postoperative radiotherapy for gastric cancer: identification of major difficulties and controversies
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title_sort	clinical target volume in postoperative radiotherapy for gastric cancer: identification of major difficulties and controversies
title_auth	Clinical target volume in postoperative radiotherapy for gastric cancer: identification of major difficulties and controversies
abstract	Purpose To identify the main difficulties in postoperative clinical target volume (CTV) delineation in gastric cancer (GC). Methods Before and after a training course, 20 radiation oncology residents were asked to delineate the CTV for the postoperative GC case on four computed tomography scans: dome of the diaphragm, anterior abdominal wall, duodenal stump and porta hepatis level, and to determine the lower CTV border. CTV volume was reconstructed from requested planar contours. Area of intersection (AI) for each requested scan and volume of intersection (VI), defined as the overlap of delineated area/volume with respective reference area (RA)/reference volume (RV) proposed by the senior radiation oncologist, were computed. The degree of agreement between the reference and participants’ contours was quantified using the Concordance Index (CI): AI/RA × 100 % or VI/RV × 100 %. The lower CTV border was analyzed separately. Pre- and post-training CIs were compared. A questionnaire investigated the difficulties with contouring. Results Mean CI value was the lowest for the dome of the diaphragm (24 % pre-training, 35 % post-training) and for the duodenal stump (49 % pre-training, 61 % post-training). Mean CI for the CTV volume was 49 % pre-training and 59 % post-training, p = 0.39. Mean distance from the reference to the participants’ lower CTV borders was 2.73 cm pre-training and 2.0 cm post-training, p = 0.71. In a questionnaire, 75 % of respondents indicated the elective nodal area as the main difficulty. Conclusions Delineation of the dome of the diaphragm and the duodenal stump, as yet not recognized as the source of variation, should be addressed in the international consensus guidelines and clarified.
abstractGer	Purpose To identify the main difficulties in postoperative clinical target volume (CTV) delineation in gastric cancer (GC). Methods Before and after a training course, 20 radiation oncology residents were asked to delineate the CTV for the postoperative GC case on four computed tomography scans: dome of the diaphragm, anterior abdominal wall, duodenal stump and porta hepatis level, and to determine the lower CTV border. CTV volume was reconstructed from requested planar contours. Area of intersection (AI) for each requested scan and volume of intersection (VI), defined as the overlap of delineated area/volume with respective reference area (RA)/reference volume (RV) proposed by the senior radiation oncologist, were computed. The degree of agreement between the reference and participants’ contours was quantified using the Concordance Index (CI): AI/RA × 100 % or VI/RV × 100 %. The lower CTV border was analyzed separately. Pre- and post-training CIs were compared. A questionnaire investigated the difficulties with contouring. Results Mean CI value was the lowest for the dome of the diaphragm (24 % pre-training, 35 % post-training) and for the duodenal stump (49 % pre-training, 61 % post-training). Mean CI for the CTV volume was 49 % pre-training and 59 % post-training, p = 0.39. Mean distance from the reference to the participants’ lower CTV borders was 2.73 cm pre-training and 2.0 cm post-training, p = 0.71. In a questionnaire, 75 % of respondents indicated the elective nodal area as the main difficulty. Conclusions Delineation of the dome of the diaphragm and the duodenal stump, as yet not recognized as the source of variation, should be addressed in the international consensus guidelines and clarified.
abstract_unstemmed	Purpose To identify the main difficulties in postoperative clinical target volume (CTV) delineation in gastric cancer (GC). Methods Before and after a training course, 20 radiation oncology residents were asked to delineate the CTV for the postoperative GC case on four computed tomography scans: dome of the diaphragm, anterior abdominal wall, duodenal stump and porta hepatis level, and to determine the lower CTV border. CTV volume was reconstructed from requested planar contours. Area of intersection (AI) for each requested scan and volume of intersection (VI), defined as the overlap of delineated area/volume with respective reference area (RA)/reference volume (RV) proposed by the senior radiation oncologist, were computed. The degree of agreement between the reference and participants’ contours was quantified using the Concordance Index (CI): AI/RA × 100 % or VI/RV × 100 %. The lower CTV border was analyzed separately. Pre- and post-training CIs were compared. A questionnaire investigated the difficulties with contouring. Results Mean CI value was the lowest for the dome of the diaphragm (24 % pre-training, 35 % post-training) and for the duodenal stump (49 % pre-training, 61 % post-training). Mean CI for the CTV volume was 49 % pre-training and 59 % post-training, p = 0.39. Mean distance from the reference to the participants’ lower CTV borders was 2.73 cm pre-training and 2.0 cm post-training, p = 0.71. In a questionnaire, 75 % of respondents indicated the elective nodal area as the main difficulty. Conclusions Delineation of the dome of the diaphragm and the duodenal stump, as yet not recognized as the source of variation, should be addressed in the international consensus guidelines and clarified.
collection_details	GBV_USEFLAG_A SYSFLAG_A GBV_SPRINGER SSG-OLC-PHA GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_74 GBV_ILN_90 GBV_ILN_95 GBV_ILN_100 GBV_ILN_105 GBV_ILN_120 GBV_ILN_152 GBV_ILN_161 GBV_ILN_171 GBV_ILN_187 GBV_ILN_224 GBV_ILN_250 GBV_ILN_281 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_702
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title_short	Clinical target volume in postoperative radiotherapy for gastric cancer: identification of major difficulties and controversies
url	https://dx.doi.org/10.1007/s12094-015-1396-6
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author2	Wołąkiewicz, G. Wasilewska-Teśluk, E. Janiga, P. Kondraciuk, T. Majewska, A. Olearski, K. Kępka, L.
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up_date	2024-07-04T00:13:24.391Z
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fullrecord_marcxml	<?xml version="1.0" encoding="UTF-8"?><collection xmlns="http://www.loc.gov/MARC21/slim"><record><leader>01000caa a22002652 4500</leader><controlfield tag="001">SPR024264725</controlfield><controlfield tag="003">DE-627</controlfield><controlfield tag="005">20230519164626.0</controlfield><controlfield tag="007">cr uuu---uuuuu</controlfield><controlfield tag="008">201006s2015 xx \|\|\|\|\|o 00\| \|\|eng c</controlfield><datafield tag="024" ind1="7" ind2=" "><subfield code="a">10.1007/s12094-015-1396-6</subfield><subfield code="2">doi</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(DE-627)SPR024264725</subfield></datafield><datafield tag="035" ind1=" " ind2=" "><subfield code="a">(SPR)s12094-015-1396-6-e</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">ASE</subfield></datafield><datafield tag="100" ind1="1" ind2=" "><subfield code="a">Socha, J.</subfield><subfield code="e">verfasserin</subfield><subfield code="4">aut</subfield></datafield><datafield tag="245" ind1="1" ind2="0"><subfield code="a">Clinical target volume in postoperative radiotherapy for gastric cancer: identification of major difficulties and controversies</subfield></datafield><datafield tag="264" ind1=" " ind2="1"><subfield code="c">2015</subfield></datafield><datafield tag="336" ind1=" " ind2=" "><subfield code="a">Text</subfield><subfield code="b">txt</subfield><subfield code="2">rdacontent</subfield></datafield><datafield tag="337" ind1=" " ind2=" "><subfield code="a">Computermedien</subfield><subfield code="b">c</subfield><subfield code="2">rdamedia</subfield></datafield><datafield tag="338" ind1=" " ind2=" "><subfield code="a">Online-Ressource</subfield><subfield code="b">cr</subfield><subfield code="2">rdacarrier</subfield></datafield><datafield tag="520" ind1=" " ind2=" "><subfield code="a">Purpose To identify the main difficulties in postoperative clinical target volume (CTV) delineation in gastric cancer (GC). Methods Before and after a training course, 20 radiation oncology residents were asked to delineate the CTV for the postoperative GC case on four computed tomography scans: dome of the diaphragm, anterior abdominal wall, duodenal stump and porta hepatis level, and to determine the lower CTV border. CTV volume was reconstructed from requested planar contours. Area of intersection (AI) for each requested scan and volume of intersection (VI), defined as the overlap of delineated area/volume with respective reference area (RA)/reference volume (RV) proposed by the senior radiation oncologist, were computed. The degree of agreement between the reference and participants’ contours was quantified using the Concordance Index (CI): AI/RA × 100 % or VI/RV × 100 %. The lower CTV border was analyzed separately. Pre- and post-training CIs were compared. A questionnaire investigated the difficulties with contouring. Results Mean CI value was the lowest for the dome of the diaphragm (24 % pre-training, 35 % post-training) and for the duodenal stump (49 % pre-training, 61 % post-training). Mean CI for the CTV volume was 49 % pre-training and 59 % post-training, p = 0.39. Mean distance from the reference to the participants’ lower CTV borders was 2.73 cm pre-training and 2.0 cm post-training, p = 0.71. In a questionnaire, 75 % of respondents indicated the elective nodal area as the main difficulty. Conclusions Delineation of the dome of the diaphragm and the duodenal stump, as yet not recognized as the source of variation, should be addressed in the international consensus guidelines and clarified.</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Adjuvant radiotherapy</subfield><subfield code="7">(dpeaa)DE-He213</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Gastric cancer</subfield><subfield code="7">(dpeaa)DE-He213</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Interobserver variation</subfield><subfield code="7">(dpeaa)DE-He213</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Radiotherapy planning</subfield><subfield code="7">(dpeaa)DE-He213</subfield></datafield><datafield tag="650" ind1=" " ind2="4"><subfield code="a">Volume delineation</subfield><subfield code="7">(dpeaa)DE-He213</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Wołąkiewicz, G.</subfield><subfield code="e">verfasserin</subfield><subfield code="4">aut</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Wasilewska-Teśluk, E.</subfield><subfield code="e">verfasserin</subfield><subfield code="4">aut</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Janiga, P.</subfield><subfield code="e">verfasserin</subfield><subfield code="4">aut</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Kondraciuk, T.</subfield><subfield code="e">verfasserin</subfield><subfield code="4">aut</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Majewska, A.</subfield><subfield code="e">verfasserin</subfield><subfield code="4">aut</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Olearski, K.</subfield><subfield code="e">verfasserin</subfield><subfield code="4">aut</subfield></datafield><datafield tag="700" ind1="1" ind2=" "><subfield code="a">Kępka, L.</subfield><subfield code="e">verfasserin</subfield><subfield code="4">aut</subfield></datafield><datafield tag="773" ind1="0" ind2="8"><subfield code="i">Enthalten in</subfield><subfield code="t">Revista de oncología</subfield><subfield code="d">Barcelona : Doyma, 2000</subfield><subfield code="g">18(2015), 5 vom: 27. 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