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

Chuan Wu; Kelly E. Hosier; Kristen E. Beck; Marlyn B. Radevic; Joerg Lehmann; Hao H. Zhang; Aaron Kroner; Sharon C. Dutton; Seth A. Rosenthal; Jonathan K. Bareng; Mark D. Logsdon; David R. Asche

doi:10.1118/1.4711755

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

Chuan Wu, Kelly E. Hosier, Kristen E. Beck, Marlyn B. Radevic, Joerg Lehmann, Hao H. Zhang, Aaron Kroner, Sharon C. Dutton, Seth A. Rosenthal, Jonathan K. Bareng, Mark D. Logsdon, David R. Asche

Research output: Contribution to journal › Article › peer-review

32 Scopus citations

Abstract

Purpose: To investigate using 3D γ analysis for IMRT and VMAT QA. Methods: We explored and studied 3D γ-analysis by comparing TPS computed and EPID back-projection reconstructed doses in patient's CT images. Two 3D γ quantities, γ_PTV and γ₁₀, were proposed and studied for evaluating the QA results, and compared to 2D γ (MapCheck composite: γ_MC). Results: It was found that when 3(global)3 mm criteria was used, all IMRT and 90 of VMAT plans passed QA with a γ pass rate 90. A significant statistical correlation was observed between 3D and 2D γ-analysis results for IMRT QA if γ₁₀ and γ_MC are concerned, but no significant relation is found between γ_PTV and γ_MC. Conclusions: 3D γ analysis based on EPID dose back-projection may provide a feasible tool for IMRT and VMAT pretreatment plan QA.

Original language	English (US)
Pages (from-to)	3051-3059
Number of pages	9
Journal	Medical physics
Volume	39
Issue number	6
DOIs	https://doi.org/10.1118/1.4711755
State	Published - Jun 2012

Keywords

3D-Gamma
EPID
IMRT
QA
VMAT

ASJC Scopus subject areas

Biophysics
Radiology Nuclear Medicine and imaging

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title = "On using 3D γ-analysis for IMRT and VMAT pretreatment plan QA",

abstract = "Purpose: To investigate using 3D γ analysis for IMRT and VMAT QA. Methods: We explored and studied 3D γ-analysis by comparing TPS computed and EPID back-projection reconstructed doses in patient's CT images. Two 3D γ quantities, γPTV and γ10, were proposed and studied for evaluating the QA results, and compared to 2D γ (MapCheck composite: γMC). Results: It was found that when 3(global)3 mm criteria was used, all IMRT and 90 of VMAT plans passed QA with a γ pass rate 90. A significant statistical correlation was observed between 3D and 2D γ-analysis results for IMRT QA if γ10 and γMC are concerned, but no significant relation is found between γPTV and γMC. Conclusions: 3D γ analysis based on EPID dose back-projection may provide a feasible tool for IMRT and VMAT pretreatment plan QA.",

keywords = "3D-Gamma, EPID, IMRT, QA, VMAT",

author = "Chuan Wu and Hosier, {Kelly E.} and Beck, {Kristen E.} and Radevic, {Marlyn B.} and Joerg Lehmann and Zhang, {Hao H.} and Aaron Kroner and Dutton, {Sharon C.} and Rosenthal, {Seth A.} and Bareng, {Jonathan K.} and Logsdon, {Mark D.} and Asche, {David R.}",

year = "2012",

month = jun,

doi = "10.1118/1.4711755",

language = "English (US)",

volume = "39",

pages = "3051--3059",

journal = "Medical physics",

issn = "0094-2405",

publisher = "AAPM - American Association of Physicists in Medicine",

number = "6",

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T1 - On using 3D γ-analysis for IMRT and VMAT pretreatment plan QA

AU - Wu, Chuan

AU - Hosier, Kelly E.

AU - Beck, Kristen E.

AU - Radevic, Marlyn B.

AU - Lehmann, Joerg

AU - Zhang, Hao H.

AU - Kroner, Aaron

AU - Dutton, Sharon C.

AU - Rosenthal, Seth A.

AU - Bareng, Jonathan K.

AU - Logsdon, Mark D.

AU - Asche, David R.

PY - 2012/6

Y1 - 2012/6

N2 - Purpose: To investigate using 3D γ analysis for IMRT and VMAT QA. Methods: We explored and studied 3D γ-analysis by comparing TPS computed and EPID back-projection reconstructed doses in patient's CT images. Two 3D γ quantities, γPTV and γ10, were proposed and studied for evaluating the QA results, and compared to 2D γ (MapCheck composite: γMC). Results: It was found that when 3(global)3 mm criteria was used, all IMRT and 90 of VMAT plans passed QA with a γ pass rate 90. A significant statistical correlation was observed between 3D and 2D γ-analysis results for IMRT QA if γ10 and γMC are concerned, but no significant relation is found between γPTV and γMC. Conclusions: 3D γ analysis based on EPID dose back-projection may provide a feasible tool for IMRT and VMAT pretreatment plan QA.

AB - Purpose: To investigate using 3D γ analysis for IMRT and VMAT QA. Methods: We explored and studied 3D γ-analysis by comparing TPS computed and EPID back-projection reconstructed doses in patient's CT images. Two 3D γ quantities, γPTV and γ10, were proposed and studied for evaluating the QA results, and compared to 2D γ (MapCheck composite: γMC). Results: It was found that when 3(global)3 mm criteria was used, all IMRT and 90 of VMAT plans passed QA with a γ pass rate 90. A significant statistical correlation was observed between 3D and 2D γ-analysis results for IMRT QA if γ10 and γMC are concerned, but no significant relation is found between γPTV and γMC. Conclusions: 3D γ analysis based on EPID dose back-projection may provide a feasible tool for IMRT and VMAT pretreatment plan QA.

KW - 3D-Gamma

KW - EPID

KW - IMRT

KW - QA

KW - VMAT

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

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Keywords

ASJC Scopus subject areas

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