Radiotherapy, a mainstay cancer treatment for patients worldwide, utilizes medical linear
accelerators (linacs) with photon energies ranging from 4 MV to 25 MV. However, concerns …

Purpose Neutrons are an unavoidable by‐product of high‐energy radiation therapy
treatments that deliver unwanted nontarget dose to patients. Use of flattening‐filter‐free …

The present study is focused to compare the characteristics of Varian Clinac 600 C/D
flattened and unflattened 6 MV photon beams for small field dosimetry using EGSnrc Monte …

Objectives The purpose of this study is to evaluate the potential of the flattening filter free
(FFF) mode of a linear accelerator for patients with hippocampal avoidance whole-brain …

Results: Photoneutron spectrum analysis indicated that neutrons with highest relative
biological effectiveness were delivered to the phantom surface, and opening the field from …

High-energy medical linear accelerator (Linac) has been widely used for treating cancer
patients. However, with its effectiveness, high-energy linac yields an undesirable amount of …

In accelerators operating energies above 7 MV, photoneutrons are produced by the
interaction of photonuclear interaction with the heavy metals that constructed the linear …

One of the most serious late side effects of cancer treatments is the development of a second
malignant neoplasm (SMN). While the risk of SMN is influenced by many factors, radiation …

فوتون پرانرژی موجب تولید آلودگی نوترونی در شتاب‌دهنده‌های خطی پزشکی می‌شوند. اثر
بیولوژیکی نسبی نوترون ۲۰ برابر فوتون است، بنابراین آسیب آن در بافت بیولوژیکی …‎

Employing High-energy photons in medical linear accelerators can lead to neutron
contamination. The relative biological effect of neutrons is 20 times higher than photons …