Purpose: Flattening filters (FFs) have been considered as an integral part of the treatment
head of a medical accelerator for more than 50 years. The reasons for the longstanding use …

This report describes the current state of flattening filter‐free (FFF) radiotherapy beams
implemented on conventional linear accelerators, and is aimed primarily at practicing …

PURPOSE: To determine dosimetric properties of unflattened megavoltage photon beams.
MATERIALS AND METHODS: Dosimetric data including depth dose, profiles, output factors …

PURPOSE: Recently, there has been a growing interest in operating medical linear
accelerators without a flattening filter. Due to reduced scatter, leaf transmission and radiation …

The aim of this paper is to determine the effect of removing the flattening filter from a linear
accelerator on the out-of-field photon dose. A Monte Carlo model was used to simulate 6 MV …

Purpose: Several works have recently focused on flattening‐filter‐free (FFF) beams of linear
accelerators of various companies (in particular, Varian and Elekta), but no overview as yet …

Flattening filter free (FFF) beams are now commonly available with new standard linear
accelerators. These beams have recognised clinical advantages in certain circumstances …

The purpose of this study is to report the dosimetric aspects of commissioning performed on
an Elekta Versa HD linear accelerator (linac) with high‐dose‐rate flattening filter‐free (FFF) …

Stereotactic body radiation therapy (SBRT) employs precision target tracking and image‐
guidance techniques to deliver ablative doses of radiation to localized malignancies; …

PURPOSE: Flattening filter–free (FFF) beams with higher dose rates and faster delivery are
now clinically available. The purpose of this planning study was to compare optimized non …