PURPOSE The applicability of various detectors for small field dosimetry and whether there are differences in the detector response when irradiated with FF- and FFF-beams was investigated. MATERIALS AND METHODS Output factors of 6 and 10 MV FF- and FFF-beams were measured with 14 different online detectors using field sizes between 10 × 10 and 0.6 × 0.6 cm(2) at a depth of 5 cm of water in is...

The 6 MV flattening filter-free (FFF) beam has been commissioned for use with compensators at our institution. This novel combination promises advantages in mitigating tumor motion due to the reduced treatment time made possible by the greatly increased dose rate of the FFF beam. Given the different energy spectrum of the FFF beam and the beam hardening effect of the compensator, the accuracy o...

PURPOSE To evaluate the dosimetric impacts of flattening filter-free (FFF) beams in intensity-modulated radiotherapy (IMRT) and volumetric modulated arc therapy (VMAT) for sinonasal cancer. METHODS For fourteen cases, IMRT and VMAT planning was performed using 6-MV photon beams with both conventional flattened and FFF modes. The four types of plans were compared in terms of target dose homoge...

For single-fraction stereotactic radiosurgery (SRS) using linac in brain metastases, more accurate treatment delivery with higher tumor absorbed doses and lower absorbed doses to normal tissues remains an enormous challenge. The purpose of this study was to investigate the dosimetric superiority in flattening filter free beams (FFF) for volumetric modulated arc therapy (VMAT) in single brain me...

The Investigations of this article focus on the response Al2O3:C and Al2O3:C,Mg radioluminescence films for medical dosimetry in various MV photon beams. A system was configured using a scientific camera, attached to head linear accelerator (LINAC), facing beam’s isocenter, where were placed. By appropriate filter lens it is possible measure real time two-dimensional dose-rate distributions. ke...

Abstract Purpose The aim of this study is to quantify the potential benefits a flattening filter‐free (FFF) beam and implement dose‐computation algorithm for cervical radiotherapy through dosimetric radiobiological analyses using RapidArc. Methods Thirty‐three patients were enrolled, four RapidArc plans created each patient dual‐arc filter 6‐MV FFF photon beams two calculation algorithms. Homog...

Respiratory motion during percutaneous radiotherapy can be considered based on respiration-correlated computed tomography (4DCT). However, most treatment planning systems perform the dose calculation based on a single primary CT data set, even though cine mode displays may allow for a visualisation of the complete breathing cycle. This might create the mistaken impression that the dose distribu...