SU-GG-T-616: The Perturbation Correction Factors for Plane-Parallel Ion Chamber Dose Measurements in the Build-Up Region of Megavoltage Photon Beams

2010 ◽  
Vol 37 (6Part25) ◽  
pp. 3329-3329
Author(s):  
F Yoshiyama ◽  
F Araki ◽  
T Ono
Keyword(s):  
Correction Factors ◽  
Photon Beams ◽  
Ion Chamber ◽  
Plane Parallel ◽  
Dose Measurements

Wall correction factors for calibration of plane-parallel ionization chambers with high-energy photon beams

2000 ◽  
Vol 45 (9) ◽  
pp. 2509-2517 ◽  
Author(s):  
Fujio Araki ◽  
Ryuji Ikeda ◽  
Yuichi Shirakawa ◽  
Toshiaki Shimonobou ◽  
Nobuyuki Moribe ◽  
...  
Keyword(s):  
High Energy ◽  
High Energy Photon ◽  
Correction Factors ◽  
Photon Beams ◽  
Ionization Chambers ◽  
Energy Photon ◽  
Plane Parallel

Potential errors in relative dose measurements in kilovoltage photon beams due to polarity effects in plane-parallel ionisation chambers

2016 ◽  
Vol 61 (23) ◽  
pp. 8395-8407 ◽  
Author(s):  
S Dowdell ◽  
M Tyler ◽  
J McNamara ◽  
K Sloan ◽  
A Ceylan ◽  
...  
Keyword(s):  
Photon Beams ◽  
Plane Parallel ◽  
Dose Measurements ◽  
Polarity Effects

Testing the GLAaS algorithm for dose measurements on low- and high-energy photon beams using an amorphous silicon portal imager

2008 ◽  
Vol 35 (2) ◽  
pp. 464-472 ◽  
Author(s):  
Giorgia Nicolini ◽  
Antonella Fogliata ◽  
Eugenio Vanetti ◽  
Alessandro Clivio ◽  
Daniel Vetterli ◽  
...  
Keyword(s):  
Amorphous Silicon ◽  
High Energy ◽  
High Energy Photon ◽  
Photon Beams ◽  
Energy Photon ◽  
Dose Measurements

Investigation of field output factors using IAEA-AAPM TRS-483 code of practice recommendations and Monte Carlo simulation for 6 MV photon beams

2021 ◽  
pp. 1-6
Author(s):  
Sumalee Yabsantia ◽  
Sivalee Suriyapee ◽  
Nakorn Phaisangittisakul ◽  
Sornjarod Oonsiri ◽  
Taweap Sanghangthum ◽  
...  
Keyword(s):  
Monte Carlo ◽  
Field Method ◽  
Correction Factors ◽  
Photon Beams ◽  
Small Field Dosimetry ◽  
Code Of Practice ◽  
Edge Detectors ◽  
Output Factors ◽  
Measured Field ◽  
Mc Simulation

Abstract Introduction: This study aims to experimentally determine field output factors using the methodologies suggested by the IAEA-AAPM TRS-483 for small field dosimetry and compare with the calculation from Monte Carlo (MC) simulation. Methods: The IBA-CC01, Sun Nuclear EDGE and IBA-SFD detectors were employed to determine the uncorrected and the corrected field output factors for 6 MV photon beams. Measurements were performed at 100 cm source to axis distance, 10 cm depth in water, and the field sizes ranged from 1 × 1 to 10 × 10 cm2. The use of field output correction factors proposed by the TRS-483 was utilised to determine field output factors. The measured field output factors were compared to that calculated using the egs_chamber user code. Results: The decrease in the percentage standard deviation of the measured three detectors was observed after applying the field output correction factors. Measured field output factors using CC01 and EDGE detectors agreed with MC values within 3% for field sizes down to 1 × 1 cm2, except the SFD detector. Conclusions: The corrected field output factors agree with the calculation from MC, except the SFD detector. CC01 and EDGE are suitable for determining field output factors, while the SFD may need more implementation of the intermediate field method.

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