Impact of segments number reduction in IMRT planning

  • M. ElGohary AlAzhar University
  • G. Kamal AlAzhar University (Girls), Cairo, Egypt
  • M. Galal Cairo University, Cairo, Egypt
  • M. Hosini Zagazig University, Zagazig, Egypt
Keywords: DAO, IMRT, Optimization, Prostate, head and neck


a brain metastatic case with multiple lesions, five head and neck, as well as five prostate patients were planned using the beamlet optimizer in Elekta-Xio© ver 4.6 IMRT treatment planning system. Based on our experience in beamlet IMRT optimization, PTVs in brain were prescribed to 66Gy using 5 fields, PTVs in H/N plans were prescribed to 70 Gy delivered by 7 fields, and prostate PTVs were prescribed to 76 Gy using nine fields. In all plans, fields were set to be equally spaced. All cases were re-planed using Direct Aperture optimizer (DAO) in Prowess Panther© ver 5.01 IMRT planning system at same configurations and dose constraints. Plans were evaluated according to ICRU criteria, number of segments, number of monitor units and planning time.

Author Biographies

M. ElGohary, AlAzhar University

Biophysics department, Faculty of science

G. Kamal, AlAzhar University (Girls), Cairo, Egypt

Biophysics department, Faculty of science

M. Galal, Cairo University, Cairo, Egypt

Radiation oncology department (NEMROK), Faculty of Medicine

M. Hosini, Zagazig University, Zagazig, Egypt

Radiation oncology department, Faculty of Medicine

How to Cite
ElGohary, M., Kamal, G., Galal, M., & Hosini, M. (2015, December 31). Impact of segments number reduction in IMRT planning. EPH - International Journal of Biological & Pharmaceutical Science (ISSN: 2208-2166), 1(1), 01-17. Retrieved from