On using 3D γ-analysis for IMRT and VMAT pretreatment plan QA

被引：37

作者：

Wu, Chuan ^{[1
]}

Hosier, Kelly E. ^{[1
]}

Beck, Kristen E. ^{[1
]}

Radevic, Marlyn B. ^{[1
]}

Lehmann, Joerg ^{[1
]}

Zhang, Hao H. ^{[2
]}

Kroner, Aaron ^{[1
]}

Dutton, Sharon C. ^{[1
]}

Rosenthal, Seth A. ^{[1
]}

Bareng, Jonathan K. ^{[1
]}

Logsdon, Mark D. ^{[1
]}

Asche, David R. ^{[1
]}

机构：

[1] RAS, ROC, Sacramento, CA 95815 USA

[2] Univ Arizona, Dept Math, Tucson, AZ 85721 USA

来源：

MEDICAL PHYSICS | 2012年 / 39卷 / 06期

关键词：

IMRT; VMAT; 3D-Gamma; EPID; QA; MODULATED ARC THERAPY; DOSE RECONSTRUCTION; QUANTITATIVE-EVALUATION; QUALITY-ASSURANCE; EPID DOSIMETRY; PASSING RATES; VERIFICATION; BEAM; ALGORITHM; IMAGES;

D O I：

10.1118/1.4711755

中图分类号：

R8 [特种医学]; R445 [影像诊断学];

学科分类号：

1002 ; 100207 ; 1009 ;

摘要：

Purpose: To investigate using 3D c analysis for IMRT and VMAT QA. Methods: We explored and studied 3D c-analysis by comparing TPS computed and EPID backprojection reconstructed doses in patient's CT images. Two 3D c quantities, cPTV and c10, were proposed and studied for evaluating the QA results, and compared to 2D c (MapCheck composite: cMC). Results: It was found that when 3%(global)= 3 mm criteria was used, all IMRT and 90% of VMAT plans passed QA with a c pass rate -90%. A significant statistical correlation was observed between 3D and 2D c-analysis results for IMRT QA if c10 and cMC are concerned, but no significant relation is found between cPTV and cMC. Conclusions: 3D c analysis based on EPID dose back-projection may provide a feasible tool for IMRT and VMAT pretreatment plan QA. (C) 2012 American Association of Physicists in Medicine. [http:/dx.doi.org10.11181.4711755]

引用

页码：3051 / 3059

页数：9

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