SU-E-T-94: Surface Dose Characteristics of Flattened and Flattening Filter Free Megavoltage Photon Beam

2013 ◽  
Vol 40 (6Part11) ◽  
pp. 225-225
Author(s):  
Darrell TH Li ◽  
Michael LM Cheung ◽  
Louis KY Lee ◽  
Michael KM Kam ◽  
Brian KH Yu ◽  
...  
Keyword(s):  
Photon Beam ◽  
Surface Dose ◽  
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

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

scholarly journals Beam flatness modulation for a flattening filter free photon beam utilizing a novel direct leaf trajectory optimization model

2020 ◽  
Vol 21 (3) ◽  
pp. 142-152
Author(s):  
Nicholas J. Potter ◽  
Guanghua Yan ◽  
Hongcheng Liu ◽  
Haitham Alahmad ◽  
Darren L. Kahler ◽  
...  
Keyword(s):  
Optimization Model ◽  
Trajectory Optimization ◽  
Photon Beam ◽  
Flattening Filter Free ◽  
Flattening Filter

PHOTON BEAM CHARACTERISTICS AT MONITOR CHAMBER LEVEL IN A FLATTENING FILTER FREE LINAC: A MONTE CARLO STUDY

2009 ◽  
Vol 92 ◽  
pp. S57 ◽  
Author(s):  
M. Lind ◽  
T. Knöös ◽  
C. Ceberg ◽  
E. Wieslander ◽  
B. McClean ◽  
...  
Keyword(s):  
Monte Carlo ◽  
Monte Carlo Study ◽  
Photon Beam ◽  
Flattening Filter Free ◽  
Flattening Filter ◽  
Beam Characteristics

Study of unflattened photon beams shaped by multileaf collimator using BEAMnrc code

2016 ◽  
Vol 15 (4) ◽  
pp. 392-401
Author(s):  
Ankit kajaria ◽  
Neeraj Sharma ◽  
Shiru Sharma ◽  
Satyajit Pradhan ◽  
Abhijit Mandal ◽  
...  
Keyword(s):  
Beam Line ◽  
Photon Beam ◽  
Field Size ◽  
Photon Beams ◽  
Multileaf Collimators ◽  
Depth Dose ◽  
Beamnrc Code ◽  
Flattening Filter Free ◽  
Flattening Filter ◽  
Beam Delivery

AbstractPurposeIn our study basic dosimetric properties of a flattening filter free 6 MV photon beam shaped by multileaf collimators (MLC) is examined using the Monte Carlo (MC) method.Methods and MaterialsBEAMnrc code was used to make a MC simulation model for 6 MV photon beam based on Varian Clinic 600 unique performance linac, operated with and without a flattening filter in beam line. Dosimetric features including central axis depth dose, beam profiles, photon and electron spectra were calculated and compared for flattened and unflattened cases.ResultsDosimetric field size and penumbra were found to be smaller for unflattened beam, and the decrease in field size was less for MLC shaped in comparison with jaw-shaped unflattened beam. Increase in dose rate of >2·4 times was observed for unflattened beam indicating a shorter beam delivery time for treatment. MLC leakage was found to decrease significantly when the flattening filter was removed from the beam line. The total scatter factor showed slower deviation with field sizes for unflattened beam indicating a reduced head scatter.ConclusionsOur study demonstrated that improved accelerator characteristics can be achieved by removing flattening filter from beam line.

scholarly journals Commissioning of portal dosimetry using a novel method for flattening filter-free photon beam in a nontrue beam linear accelerator

2018 ◽  
Vol 0 (0) ◽  
pp. 0
Author(s):  
Subramani Vellaiyan ◽  
Arun Gandhi ◽  
VS Subramanian ◽  
Thirumalaiswamy Shanmugam ◽  
Kathirvel Murugesan ◽  
...  
Keyword(s):  
Linear Accelerator ◽  
Photon Beam ◽  
Flattening Filter Free ◽  
Portal Dosimetry ◽  
Flattening Filter ◽  
Novel Method
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