Nuclear Medicine & Radiation Therapy

Ismail E Mohamed

Publications

• Research Article
  Portal Dosimetry for Pre-treatment Verification of Imrt/Vmat Plan: A Comparison with 2D Array Detector for Quality Assurance
  
  Author(s): Ayman G Mohamed, Ismail E Mohamed and Hamdy M ZidanAyman G Mohamed, Ismail E Mohamed and Hamdy M Zidan
  
  Purpose: The present study is to investigate the measured and calculated doses for different malignant tumours utilizing various gamma criteria and QA for confirmation of IMRT/VMAT with portal dosimetry and 2D array. Methods: Different malignant tumors are treated by IMRT/VMAT techniques on Varian IX linear accelerator with 6 MV photon beams. Treatment planning system (TPS) is used to plan Patient’s charts. Gamma Index (GI) variation is compared to the procedure of pre-treatment verification in IMRT/VMAT plans. Results: The gamma criteria (DD/ DTA) of IMRT for (3%/3 mm), mean ± SD are γ≤ 1%=99.41% ± 0.67%, γmax=2.11 ± 0.56 and γavg=0.23 ± 0.03 by EPID, and γ% ≤ 1=98.55% ± 0.79%, γmax=1.65 ± 0.45 and γavg=0.27 ± 0.04 by using .. Read More»
  

  Abstract