Design and implementation of an anthropomorphic quality assurance phantom for intensity-modulated radiation therapy for the Radiation Therapy Oncology Group.

摘要: Purpose: To design, construct, and evaluate an anthropomorphic phantom for evaluation of intensity-modulated radiation therapy (IMRT) dose planning delivery, protocols developed by the Radiation Therapy Oncology Group (RTOG) other cooperative groups. Methods Materials: The was constructed from a plastic head-shaped shell water-equivalent plastics. Internal structures mimic target volumes organ at risk. Thermoluminescent dosimeters (TLDs) radiochromic film were used to measure absolute distribution, respectively. reproducibility phantom’s verified IMRT treatments, then imaged, planned, irradiated 10 RTOG institutions. Results: TLD results three identical irradiations showed percent standard deviation less than 1.6%, film-scanning system reproducible within 0.35 mm. Data collected institutions that agreed with institutions’ doses 5% in 13% Shifts as large 8 mm between treatment plan delivery detected film. Conclusions: An using can verify field placement treatments. © 2005 Elsevier Inc.