Applying a polynomial formula to photon beam output and equivalent square field

1990 ◽  
Vol 17 (3) ◽  
pp. 464-469 ◽  
Author(s):  
Fan-Shih Chen
Keyword(s):  
Photon Beam ◽  
Beam Output ◽  
Polynomial Formula

Small-field radiotherapy photon beam output evaluation: Detectors reviewed

2021 ◽  
Vol 178 ◽  
pp. 108950 ◽  
Author(s):  
S.E. Lam ◽  
D.A. Bradley ◽  
M.U. Khandaker
Keyword(s):  
Photon Beam ◽  
Small Field ◽  
Beam Output

scholarly journals A standard Fricke dosimeter compared to an ionization chamber used for dosimetric characterization of 60Co photon beam

2016 ◽  
Vol 22 (2) ◽  
pp. 19-24 ◽  
Author(s):  
Ouiza Moussous ◽  
Toufik Medjadj
Keyword(s):  
Ionization Chamber ◽  
Absorbed Dose ◽  
Photon Beam ◽  
Reference Laboratory ◽  
Depth Dose ◽  
Beam Output ◽  
Output Factors ◽  
Γ Rays ◽  
Cylindrical Ionization Chamber

Abstract The main objective of this study was to investigate the Fricke dosimeter water equivalent system for measurement of dosimetric parameters for photon beam. The parameters measured with the Fricke dosimeter were compared to those obtained with an ionization chamber. In this work characteristics for 60Co γ-rays of field sizes ranging from 5 × 5 cm2 to 20 × 20 cm2 are reported. The measurements were carried out in the secondary standard dosimetry laboratory using a collimated 60Co gamma source therapy unit. The 60Co beam output in terms of absorbed dose to water was obtained as per IAEA TRS 398 recommendations using cylindrical ionization chamber, whose ND,w has been supplied by the IAEA's reference laboratory. Specific quantities measured include: output factors, peak scatter factor, lateral beam profiles and percentage depth dose. The Fricke dosimeters were irradiated in a water phantom using the suitable poly (methyl methacrylate), PMMA stand. Our results demonstrate that Fricke dosimeter and ionization chamber agree with each other.

A widely tested model for head scatter influence on photon beam output

2003 ◽  
Vol 67 (2) ◽  
pp. 225-238 ◽  
Author(s):  
Jörgen Olofsson ◽  
Dietmar Georg ◽  
Mikael Karlsson
Keyword(s):  
Photon Beam ◽  
Beam Output
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