Title :
Scatter dose model for therapeutic photon beams
Author :
Nizin, Paul S. ; Mooij, Rob B.
Author_Institution :
Dept. of Radiol., Baylor Coll. of Med., Houston, TX, USA
fDate :
6/22/1905 12:00:00 AM
Abstract :
The scatter component of an absorbed dose from therapeutic photon beams in water is studied using a model that treats the buildup and attenuation of scatter dose as separate phenomena. Monte Carlo simulated data for 60Co and 15 MV photons are used as database for the study. A hypothesis on equal attenuation rate of primary and scatter dose in phantom material is formulated. A method and pertinent data are developed to examine a proposed hypothesis. It is shown that the attenuation of scatter dose with phantom depth can be described by the exponential function given. Thus, the results suggest that the assumption of equal attenuation rate for primary and scatter dose in phantom material is realistic
Keywords :
X-ray scattering; dosimetry; gamma-ray scattering; modelling; radiation therapy; water; 15 MV; 15 MV photons; 60Co photons; Co; H2O; Monte Carlo simulated data; phantom depth; phantom material; primary dose; radiotherapy dosimetry; scatter dose model; therapeutic photon beams; Attenuation; Databases; Electromagnetic scattering; Gamma rays; Imaging phantoms; Monte Carlo methods; Particle scattering; Solid modeling; Surface treatment; X-ray scattering;
Conference_Titel :
Engineering in Medicine and Biology Society, 2000. Proceedings of the 22nd Annual International Conference of the IEEE
Print_ISBN :
0-7803-6465-1
DOI :
10.1109/IEMBS.2000.900440
