Document Type : Original Paper
Pravara Institute of Medical Science
Pravara Institute of MEdical Sciences
Government Cancer Hospital, MGM Medical College, Indore
Background: State-of-art radiotherapy techniques such as Intensity Modulated Radiotherapy (IMRT) and Volumetric Modulated Arc Therapy (VMAT) are being used for treatment of cancer with high accuracy. Verification of planned and delivered dose distribution is very important, therefore current study has been carried out with purpose to evaluate quality assurance (QA) results and effectiveness of Electronic Portal Imaging Device (EPID) and IMatriXX in cases of Carcinoma patients.
Materials and Methods: Performance of an EPID and IMatriXX was assessed with dose measurements using ionization chamber. Calibrated IMatriXX and EPID are used for pre-treatment patient specific quality assurance (PSQA), for 204 cancer patients plans with IMRT treatment technique on linear accelerator. Dose image for each treatment field were compared with gamma evaluation (3%/3mm) and combination of three scalar parameters were evaluated against EPID and to quantify gamma results within region of interest; namely average (avg), maximum (max) and Area Gamma