SU-E-T-719: Surface Dose Evaluation of the Equivalent Quality Flattening Filter-Free Photon Beams

2015 ◽  
Vol 42 (6Part23) ◽  
pp. 3502-3502
Author(s):  
M Meshram ◽  
S Pramanik ◽  
C P Ranjith ◽  
M Meshram
Keyword(s):  
Surface Dose ◽  
Photon Beams ◽  
Dose Evaluation ◽  
Flattening Filter Free ◽  
Flattening Filter

PERIPHERAL SURFACE DOSE FROM A LINEAR ACCELERATOR: RADIOCHROMIC FILM EXPERIMENTAL MEASUREMENTS OF FLATTENING FILTER FREE VERSUS FLATTENED BEAMS

2020 ◽  
Vol 188 (3) ◽  
pp. 285-298
Author(s):  
Trinitat García-Hernández ◽  
Aurora Vicedo-González ◽  
Beatriz Sánchez-Nieto ◽  
Maite Romero-Expósito ◽  
Joan Roselló-Ferrando
Keyword(s):  
Linear Accelerator ◽  
Calibration Method ◽  
Radiochromic Film ◽  
Clinical Parameters ◽  
Surface Dose ◽  
Photon Beams ◽  
Flattening Filter Free ◽  
Clinical Breast ◽  
Flattening Filter ◽  
Peripheral Surface

Abstract There is a growing interest in the use of flattening filter free (FFF) beams due to the shorter treatment times. The reduction of head scatter suggests a better radiation protection to radiotherapy patients, considering the expected decrease in peripheral surface dose (PSD). In this work, PSD of flattened (FF) and FFF-photon beams was compared. A radiochromic film calibration method to reduce energy dependence was used. PSD was measured at distances from 2 to 50 cm to the field border for different square field sizes, modifying relevant clinical parameters. Also, clinical breast and prostate stereotactic body radiotherapy (SBRT) plans were studied. For square beams, FFF PSD is lower compared with FF PSD (differences ranging from 3 to 64%) and 10 MV FFF yields to the lowest value, for distances greater than 5 cm. For SBRT plans, near and far away from the field border, there is a reduction of PSD for FFF-beams, but the behavior at intermediate distances should be checked depending on the case.

Surface Dose Investigation of the Flattening Filter-Free Photon Beams

2012 ◽  
Vol 83 (2) ◽  
pp. e281-e285 ◽  
Author(s):  
Yuenan Wang ◽  
Mohammad K. Khan ◽  
Joseph Y. Ting ◽  
Stephen B. Easterling
Keyword(s):  
Surface Dose ◽  
Photon Beams ◽  
Flattening Filter Free ◽  
Flattening Filter

Dose evaluation of Grid Therapy using a 6 MV flattening filter-free (FFF) photon beam: A Monte Carlo study

2017 ◽  
Vol 44 (10) ◽  
pp. 5378-5383 ◽  
Author(s):  
Immaculada Martínez-Rovira ◽  
Josep Puxeu-Vaqué ◽  
Yolanda Prezado
Keyword(s):  
Monte Carlo ◽  
Monte Carlo Study ◽  
Photon Beam ◽  
Dose Evaluation ◽  
Flattening Filter Free ◽  
Flattening Filter

scholarly journals Comparative investigation of beam quality index Q on flattening filter and flattening filter free 6 and 15 MV photon beams of an medical linear accelerator

2017 ◽  
Vol 3 (2) ◽  
pp. 287-290
Author(s):  
Michael Schaks ◽  
Johannes Zähle ◽  
Martin Janich ◽  
Patrick Hübsch ◽  
Nico Homonnay ◽  
...  
Keyword(s):  
Linear Accelerator ◽  
Quality Index ◽  
Beam Quality ◽  
Comparative Investigation ◽  
Central Axis ◽  
Photon Beams ◽  
Medical Linear Accelerator ◽  
Flattening Filter Free ◽  
Flattening Filter ◽  
Beam Quality Correction Factor

AbstractAn Elekta Synergy LINAC was used to investigate the beam quality index Q and the beam quality correction factor kQ, which is used for absolute dosimetry, in off-axis photon fields. It was found that the beam quality index Q of the photon energies with flattening filter decreases with increasing distance to the central axis, at 6 MV by 4.27% and at 15 MV by 3.98% inside a range of 15 cm off-axis. The beam quality index for flattening filter free photon fields also decreases with increasing distance to the central axis. In this case Q changed only by 1.01% inside the above range.

SU-DD-A1-03: Dosimetric Properties of Photon Beams From a Flattening Filter Free Clinical Accelerator

2005 ◽  
Vol 32 (6Part2) ◽  
pp. 1896-1896 ◽  
Author(s):  
O Vassiliev ◽  
U Titt ◽  
S Kry ◽  
F Poenisch ◽  
M Gillin ◽  
...  
Keyword(s):  
Photon Beams ◽  
Flattening Filter Free ◽  
Flattening Filter

TH-E-224A-06: Dosimetric Properties of 8 and 10 MV Photon Beams From a Flattening Filter Free Clinical Accelerator

2006 ◽  
Vol 33 (6Part23) ◽  
pp. 2292-2292 ◽  
Author(s):  
O Vassiliev ◽  
U Titt ◽  
M Gillin ◽  
R Mohan
Keyword(s):  
Photon Beams ◽  
Flattening Filter Free ◽  
Flattening Filter
Sign in / Sign up

Export Citation Format

Share Document