| Autor: |
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 |
| Rok vydání: |
2012 |
| Předmět: |
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| Zdroj: |
Medical physics. 39(6) |
| ISSN: |
0094-2405 |
| Popis: |
To investigate using 3D γ analysis for IMRT and VMAT QA.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 γ(10), were proposed and studied for evaluating the QA results, and compared to 2D γ (MapCheck composite: γ(MC)).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 γ(10) and γ(MC) are concerned, but no significant relation is found between γ(PTV) and γ(MC).3D γ analysis based on EPID dose back-projection may provide a feasible tool for IMRT and VMAT pretreatment plan QA. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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