Table of Contents
Journal of Radiotherapy
Volume 2014, Article ID 760206, 7 pages
Clinical Study

Dosimetric Studies of Mixed Energy Intensity Modulated Radiation Therapy for Prostate Cancer Treatments

1INFN and Department of Physics, University of Torino, Via P.Giuria, 10125 Torino, Italy
2Department of Radiation Therapy, AJ Cancer Institute, Mangalore, Karnataka 575004, India
3Department of Radiation Therapy, HCG, Dr.Balabhai Nanavati Hospital, Vile Parle (West), Mumbai, Maharashtra 400 056, India
4Department of Physics, Noorul Islam Centre for Higher Education, Kumaracoil, Thuckalay, Kanyakumari District, Tamil Nadu 629180, India
5Department of Physics, University of Calicut, Thenhipalam, Malappuram, Kerala 673635, India

Received 30 November 2013; Revised 1 February 2014; Accepted 11 February 2014; Published 16 March 2014

Academic Editor: Carlos A. Perez

Copyright © 2014 K. Abdul Haneefa et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Dosimetric studies of mixed field photon beam intensity modulated radiation therapy (IMRT) for prostate cancer using pencil beam (PB) and collapsed cone convolution (CCC) algorithms using Oncentra MasterPlan treatment planning system (v. 4.3) are investigated in this study. Three different plans were generated using 6 MV, 15 MV, and mixed beam (both 6 and 15 MV). Fifteen patients with two sets of plans were generated: one by using PB and the other by using CCC for the same planning parameters and constraints except the beam energy. For each patient’s plan of high energy photons, one set of photoneutron measurements using solid state neutron track detector (SSNTD) was taken for this study. Mean percentage of in the rectum is , , and for 6 MV, 15 MV, and mixed-energy plans, respectively. Mean percentage of in bladder is , and for 6 MV, 15 MV, and mixed-energy plans, respectively. Mixed fields neutron contribution at the beam entrance surface is 45.62% less than at 15 MV photon beam. Our result shows that, with negligible neutron contributions, mixed field IMRT has considerable dosimetric advantage.