Effect of electron contamination on scatter correction factors for photon beam dosimetry

1999 ◽  
Vol 26 (10) ◽  
pp. 2099-2106 ◽  
Author(s):  
Jack Venselaar ◽  
Stan Heukelom ◽  
Niek Jager ◽  
Ben Mijnheer ◽  
Rob van der Laarse ◽  
...  
Keyword(s):  
Scatter Correction ◽  
Photon Beam ◽  
Correction Factors ◽  
Beam Dosimetry

Response to “Comment on ‘The effect of electron contamination on scatter correction factors for photon beam dosimetry’ ” [Med. Phys.27, 616 (2000)]

2000 ◽  
Vol 27 (3) ◽  
pp. 617-617
Author(s):  
Jack Venselaar ◽  
Stan Heukelom ◽  
Niek Jager ◽  
Ben Mijnheer ◽  
Rob van der Laarse ◽  
...  
Keyword(s):  
Scatter Correction ◽  
Photon Beam ◽  
Correction Factors ◽  
Beam Dosimetry

Percentage depth dose fragmentation for investigating and assessing the photon beam dosimetry quality

2018 ◽  
Vol 18 (03) ◽  
pp. 280-284 ◽  
Author(s):  
Mohamed Bencheikh ◽  
Abdelmajid Maghnouj ◽  
Jaouad Tajmouati
Keyword(s):  
Exponential Decay ◽  
Target Volume ◽  
Photon Beam ◽  
Field Size ◽  
Photon Beams ◽  
Energy Agency ◽  
Percentage Depth Dose ◽  
Depth Dose ◽  
Beam Dosimetry

AbstractAimThe purpose of this study is to introduce a new approach to assess the dosimetry quality of photon beam with energy and irradiation field size. This approach is based on percentage depth dose (PDD) fragmentation for investigating the dosimetry quality.Materials and methodsFor the investigation of the dosimetry quality of 6 and 18 MV photon beams, we have proceeded to fragment the PDD at different field sizes. This approach checks the overall PDD and is not restricted to the exponential decay regions, as per the International Atomic Energy Agency Technical Reports Series No 398 and the American Association of Physicist in Medicine Task Group 51 recommendations.Results and discussionThe 6 MV photon beam deposited more energy in the target volume than the 18 MV photon beam. The dose delivered by the 6 MV beam is greater by a factor of 1·5 than that delivered by the 18 MV beam in the build-up region and the dose delivered by the 6 MV beam is greater by a factor of 2·6 than that delivered by the 18 MV beam in the electronic equilibrium and the exponential decay regions.ConclusionThe dose measured at different points of the beam is higher for 6 MV than for 18 MV photon beam. Therefore, the 6 MV beam is more dosimetrically efficient than the 18 MV beam. Using the proposed approach, we can assess the dosimetry quality by taking into account overall PDD not only in the exponential decay region but also in the field.

Effect of Contrast Media on Megavoltage Photon Beam Dosimetry

2008 ◽  
Vol 33 (3) ◽  
pp. 169-174 ◽  
Author(s):  
Ashley W. Rankine ◽  
Peter J. Lanzon ◽  
Nigel A. Spry
Keyword(s):  
Contrast Media ◽  
Photon Beam ◽  
Beam Dosimetry

scholarly journals Why diamond dimensions and electrode geometry are crucial for small photon beam dosimetry

2015 ◽  
Vol 118 (23) ◽  
pp. 234507 ◽  
Author(s):  
F. Marsolat ◽  
D. Tromson ◽  
N. Tranchant ◽  
M. Pomorski ◽  
C. Bassinet ◽  
...  
Keyword(s):  
Photon Beam ◽  
Electrode Geometry ◽  
Beam Dosimetry

324 Monte Carlo correction factors in non reference conditions: buildup regions of a 6MV photon beam

2005 ◽  
Vol 76 ◽  
pp. S148
Author(s):  
J. Pena ◽  
F. Sânchez-Doblado ◽  
R. Capote-Noy ◽  
J.A. Terrón ◽  
F. Gómez
Keyword(s):  
Monte Carlo ◽  
Reference Conditions ◽  
Photon Beam ◽  
Correction Factors
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