IRCT20180919041070N4 IRCT 2020-04-21 Iran University of Medical Sciences Rectal retractor in prostate cancer Clinical evaluation and comparison of rectal toxicity and absorbed dose effects of radiation therapy with and without rectal retractor on patients with prostate cancer 2019-10-22 anticipated 36 Complete https://irct.ir/trial/46385 interventional Randomization: Randomized, Blinding: Not blinded, Placebo: Not used, Assignment: Parallel, Purpose: Supportive, Randomization description: Block randomization is used to randomize subjects. The block size is Four (Two patients in the intervention group and Two patient in the control group). For random allocation, since 36 patients should be allocated in two groups of 18, nine random blocks (each block consisting of four patients) are generated using an online software (WWW.sealedenvelope.com). N/A Prostate cancer. Intervention 1: Intervention group: Patients who are treated with rectal retractor in order to retract the rectum and distance it from prostate, Intervention: A rectal retractor probe which is designed with CATIA V5R2 software and is constructed by Mahdavi et. al. in Iran University of Medical Sciences. The probe is made of Acrylic which is equivalent to body tissue.The rectal retractor is used in the intervention group for 20 sessions of 35sessions of radiation therapy treatment sessions. Intervention 2: Control group: Patients with localized prostate cancer who are treated with 35 sessions radiation therapy without rectal retractor. Yes - There is a plan to make this available What will be shared: Information about main outcomes of the study When: Six months after publishing the results To whom: Researchers in universities and scientific and research centers Conditions: In order to improve the treatment of the disease and subsequent research and with the permission of the authors Where to obtain: Department of Radiation Oncology of Iran University of Medical Sciences How to obtain: Sending the request in writing or by email to the authors Comments: