Cargando…
Three-dimensional dose reconstruction-based pretreatment dosimetric verification in volumetric modulated arc therapy for prostate cancer
PURPOSE: We performed three-dimensional (3D) dose reconstruction-based pretreatment verification to evaluate gamma analysis acceptance criteria in volumetric modulated arc therapy (VMAT) for prostate cancer. MATERIALS AND METHODS: Pretreatment verification for 28 VMAT plans for prostate cancer was p...
Autores principales: | , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The Korean Society for Radiation Oncology
2020
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7113150/ https://www.ncbi.nlm.nih.gov/pubmed/32229810 http://dx.doi.org/10.3857/roj.2020.00066 |
_version_ | 1783513607636516864 |
---|---|
author | Jeong, Yuri Oh, Jeong Geun Kang, Jeong Ku Moon, Sun Rock Lee, Kang Kyoo |
author_facet | Jeong, Yuri Oh, Jeong Geun Kang, Jeong Ku Moon, Sun Rock Lee, Kang Kyoo |
author_sort | Jeong, Yuri |
collection | PubMed |
description | PURPOSE: We performed three-dimensional (3D) dose reconstruction-based pretreatment verification to evaluate gamma analysis acceptance criteria in volumetric modulated arc therapy (VMAT) for prostate cancer. MATERIALS AND METHODS: Pretreatment verification for 28 VMAT plans for prostate cancer was performed using the COMPASS system with a dolphin detector. The 3D reconstructed dose distribution of the treatment planning system calculation (TC) was compared with that of COMPASS independent calculation (CC) and COMPASS reconstruction from the dolphin detector measurement (CR). Gamma results (gamma failure rate and average gamma value [GFR and γAvg]) and dose-volume histogram (DVH) deviations, 98%, 2% and mean dose-volume difference (DD(98%), DD(2%) and DD(mean)), were evaluated. Gamma analyses were performed with two acceptance criteria, 2%/2 mm and 3%/3 mm. RESULTS: The GFR in 2%/2 mm criteria were less than 8%, and those in 3%/3 mm criteria were less than 1% for all structures in comparisons between TC, CC, and CR. In the comparison between TC and CR, GFR and γAvg in 2%/2 mm criteria were significantly higher than those in 3%/3 mm criteria. The DVH deviations were within 2%, except for DD(mean) (%) for rectum and bladder. CONCLUSIONS: The 3%/3 mm criteria were not strict enough to identify any discrepancies between planned and measured doses, and DVH deviations were less than 2% in most parameters. Therefore, gamma criteria of 2%/2 mm and DVH related parameters could be a useful tool for pretreatment verification for VMAT in prostate cancer. |
format | Online Article Text |
id | pubmed-7113150 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | The Korean Society for Radiation Oncology |
record_format | MEDLINE/PubMed |
spelling | pubmed-71131502020-04-07 Three-dimensional dose reconstruction-based pretreatment dosimetric verification in volumetric modulated arc therapy for prostate cancer Jeong, Yuri Oh, Jeong Geun Kang, Jeong Ku Moon, Sun Rock Lee, Kang Kyoo Radiat Oncol J Original Article PURPOSE: We performed three-dimensional (3D) dose reconstruction-based pretreatment verification to evaluate gamma analysis acceptance criteria in volumetric modulated arc therapy (VMAT) for prostate cancer. MATERIALS AND METHODS: Pretreatment verification for 28 VMAT plans for prostate cancer was performed using the COMPASS system with a dolphin detector. The 3D reconstructed dose distribution of the treatment planning system calculation (TC) was compared with that of COMPASS independent calculation (CC) and COMPASS reconstruction from the dolphin detector measurement (CR). Gamma results (gamma failure rate and average gamma value [GFR and γAvg]) and dose-volume histogram (DVH) deviations, 98%, 2% and mean dose-volume difference (DD(98%), DD(2%) and DD(mean)), were evaluated. Gamma analyses were performed with two acceptance criteria, 2%/2 mm and 3%/3 mm. RESULTS: The GFR in 2%/2 mm criteria were less than 8%, and those in 3%/3 mm criteria were less than 1% for all structures in comparisons between TC, CC, and CR. In the comparison between TC and CR, GFR and γAvg in 2%/2 mm criteria were significantly higher than those in 3%/3 mm criteria. The DVH deviations were within 2%, except for DD(mean) (%) for rectum and bladder. CONCLUSIONS: The 3%/3 mm criteria were not strict enough to identify any discrepancies between planned and measured doses, and DVH deviations were less than 2% in most parameters. Therefore, gamma criteria of 2%/2 mm and DVH related parameters could be a useful tool for pretreatment verification for VMAT in prostate cancer. The Korean Society for Radiation Oncology 2020-03 2020-03-25 /pmc/articles/PMC7113150/ /pubmed/32229810 http://dx.doi.org/10.3857/roj.2020.00066 Text en Copyright © 2020 The Korean Society for Radiation Oncology This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Original Article Jeong, Yuri Oh, Jeong Geun Kang, Jeong Ku Moon, Sun Rock Lee, Kang Kyoo Three-dimensional dose reconstruction-based pretreatment dosimetric verification in volumetric modulated arc therapy for prostate cancer |
title | Three-dimensional dose reconstruction-based pretreatment dosimetric verification in volumetric modulated arc therapy for prostate cancer |
title_full | Three-dimensional dose reconstruction-based pretreatment dosimetric verification in volumetric modulated arc therapy for prostate cancer |
title_fullStr | Three-dimensional dose reconstruction-based pretreatment dosimetric verification in volumetric modulated arc therapy for prostate cancer |
title_full_unstemmed | Three-dimensional dose reconstruction-based pretreatment dosimetric verification in volumetric modulated arc therapy for prostate cancer |
title_short | Three-dimensional dose reconstruction-based pretreatment dosimetric verification in volumetric modulated arc therapy for prostate cancer |
title_sort | three-dimensional dose reconstruction-based pretreatment dosimetric verification in volumetric modulated arc therapy for prostate cancer |
topic | Original Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7113150/ https://www.ncbi.nlm.nih.gov/pubmed/32229810 http://dx.doi.org/10.3857/roj.2020.00066 |
work_keys_str_mv | AT jeongyuri threedimensionaldosereconstructionbasedpretreatmentdosimetricverificationinvolumetricmodulatedarctherapyforprostatecancer AT ohjeonggeun threedimensionaldosereconstructionbasedpretreatmentdosimetricverificationinvolumetricmodulatedarctherapyforprostatecancer AT kangjeongku threedimensionaldosereconstructionbasedpretreatmentdosimetricverificationinvolumetricmodulatedarctherapyforprostatecancer AT moonsunrock threedimensionaldosereconstructionbasedpretreatmentdosimetricverificationinvolumetricmodulatedarctherapyforprostatecancer AT leekangkyoo threedimensionaldosereconstructionbasedpretreatmentdosimetricverificationinvolumetricmodulatedarctherapyforprostatecancer |