SU-E-T-83: Potential Improvements in Nonstandard Beam Quality Correction Factor Measurements Using Radiochromic Film Mutlichannel Analysis

2011 ◽  
Vol 38 (6Part11) ◽  
pp. 3504-3504 ◽  
Author(s):  
H Bouchard
Keyword(s):  
Correction Factor ◽  
Beam Quality ◽  
Radiochromic Film ◽  
Beam Quality Correction Factor

Reference dosimetry condition and beam quality correction factor for CyberKnife beam

2008 ◽  
Vol 35 (10) ◽  
pp. 4591-4598 ◽  
Author(s):  
Toru Kawachi ◽  
Hidetoshi Saitoh ◽  
Mitsuhiro Inoue ◽  
Tetsurou Katayose ◽  
Atsushi Myojoyama ◽  
...  
Keyword(s):  
Correction Factor ◽  
Beam Quality ◽  
Beam Quality Correction Factor

SU-E-T-36: Determination of the Beam Quality Correction Factor for the Liquid Ioinization Chamber in a Clinical Photon Beam

2013 ◽  
Vol 40 (6Part10) ◽  
pp. 211-211
Author(s):  
Sang Hyoun Choi ◽  
Woo Chul Kim ◽  
Seong Hoon Kim ◽  
Chan Hyeong Kim ◽  
Young Hoon Ji ◽  
...  
Keyword(s):  
Correction Factor ◽  
Beam Quality ◽  
Photon Beam ◽  
Beam Quality Correction Factor

Determination of the beam quality correction factor $k_{Q,Q_0 } $ for the microLion chamber in a clinical photon beam

2013 ◽  
Vol 62 (1) ◽  
pp. 152-158 ◽  
Author(s):  
Sang Hyoun Choi ◽  
Chan Hyeong Kim ◽  
Hyun Do Huh ◽  
Kum-Bae Kim ◽  
SeongHoon Kim
Keyword(s):  
Correction Factor ◽  
Beam Quality ◽  
Photon Beam ◽  
Beam Quality Correction Factor ◽  
Microlion Chamber

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.

Strategies for accurate response assessment of radiochromic film using flatbed scanner for beam quality assurance

2019 ◽  
Vol 30 (11) ◽  
Author(s):  
Xu-Dong Zhang ◽  
Yuan-Hao Liu ◽  
Xiao-Bin Tang ◽  
Ming-Chen Hsiao ◽  
Wei-Lin Chen ◽  
...  
Keyword(s):  
Quality Assurance ◽  
Beam Quality ◽  
Response Assessment ◽  
Radiochromic Film ◽  
Flatbed Scanner

scholarly journals Quality assurance procedures based on dosimetric, gamma analysis as a fast reliable tool for commissioning brachytherapy treatment planning systems

2017 ◽  
Vol 51 (4) ◽  
pp. 469-474 ◽  
Author(s):  
Grzegorz Zwierzchowski ◽  
Grzegorz Bieleda ◽  
Janusz Skowronek
Keyword(s):  
Quality Assurance ◽  
Treatment Planning ◽  
Dose Distribution ◽  
Beam Quality ◽  
Calculated Data ◽  
Radiochromic Film ◽  
Film Dosimetry ◽  
Planning Systems ◽  
Treatment Planning Systems ◽  
Gamma Analysis

Abstract Background Fast and easily repeatable methods for commissioning procedures for brachytherapy (BT) treatment planning systems (TPS) are needed. Radiochromic film dosimetry with gamma analysis is widely used in external beam quality assurance (QA) procedures and planar film dosimetry is also increasingly used for verification of the dose distribution in BT applications. Using the gamma analysis method for comparing calculated and measured dose data could be used for commissioning procedures of the newly developed TG-186 and MBDCA calculation algorithms. The aim of this study was dosimetric verification of the calculation algorithm used in TPS when the CT/MRI ring applicator is used. Materials and methods Ring applicators with 26 and 30 mm diameters and a 60 mm intra-uterine tube with 60° angle were used for verification. Gafchromic® EBT films were used as dosimetric media. Dose grids, corresponding to each plane (dosimetric film location), were exported from the TPS as a raw data. Gafchromic® films were digitized after irradiation. gamma analysis of the data were performed using the OMNI Pro I’mRT® system, as recommended by the AAPM TG-119 rapport criterion for gamma analysis of 3%, 3 mm and a level of 95%. Results For the 26 mm and 30 mm rings, the average gamma ranged, respectively, from 0.1 to 0.44 and from 0.1 to 0.27. In both cases, 99% of the measured points corresponded with the calculated data. Conclusions This analysis showed excellent agreement between the dose distribution calculated with the TPS and the doses measured by Gafchromic films. This finding confirms the viability of using film dosimetry in BT.

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