Electronic portal image device dosimetry for volumetric modulated arc therapy
Creators
- 1. Osaka City Univ., Hospital, Osaka, Osaka (Japan)
- 2. Osaka City Univ., Graduate School of Medicine, Osaka, Osaka (Japan)
Description
Recently electronic portal image devices (EPIDs) have been widely used for quality assurance and dose verification. However there are no reports describing EPID dosimetry for Elekta volumetric modulated arc therapy (VMAT). We have investigated EPID dosimetry during VMAT delivery using a commercial software EPIDose with an Elekta Synergy linac. Dose rate dependence and the linac system sag during gantry rotation were measured. Gamma indices were calculated between measured doses using an EPID and calculation made by a treatment planning system for prostate VMAT test plans. The results were also compared to gamma indices using films and a two-dimensional detector array, MapCHECK2. The pass rates of the gamma analysis with a criterion of 3% and 2 mm for the three methods were over 96% with good consistency. Our results have showed that EPID dosimetry is feasible for Elekta VMAT. (author)
Additional details
Publishing Information
- Journal Title
- Nippon Hoshasen Gijutsu Gakkai Zasshi
- Journal Volume
- 69
- Journal Issue
- 1
- Journal Page Range
- p. 11-18
- ISSN
- 0369-4305
INIS
- Country of Publication
- Japan
- Country of Input or Organization
- Japan
- INIS RN
- 44073505
- Subject category
- S62: RADIOLOGY AND NUCLEAR MEDICINE;
- Descriptors DEI
- DOSE RATES; DOSIMETRY; LINEAR ACCELERATORS; PATIENTS; PHANTOMS; PHOTON BEAMS; PLANNING; PROSTATE; QUALITY ASSURANCE; RADIATION DOSES; RADIOTHERAPY; X RADIATION
- Descriptors DEC
- ACCELERATORS; BEAMS; BODY; DOSES; ELECTROMAGNETIC RADIATION; GLANDS; IONIZING RADIATIONS; MALE GENITALS; MEDICINE; MOCKUP; NUCLEAR MEDICINE; ORGANS; RADIATIONS; RADIOLOGY; STRUCTURAL MODELS; THERAPY