DocumentCode
2843259
Title
Modeling off-axis beam-softening to improve 3D dose-calculation accuracy for wedged photon beams
Author
Sun, Jiansheng ; Doswell, Gary ; Cunningham, Jack
Author_Institution
Div. of Therapy Syst., MDS Nordion, Kanata, Ont., Canada
Volume
3
fYear
2000
fDate
2000
Firstpage
1813
Abstract
We have shown that, by explicitly including the off-axis beam softening effect into the dose calculation algorithm, one can completely resolve the dose over-estimation problem along the non-wedged direction for a wedged beam, without degrading the calculation accuracy along the wedged direction. This results in considerable improvement for calculations of 3D dose-distributions when a wedge is involved
Keywords
dosimetry; photon transport theory; radiation therapy; 3D dose-calculation accuracy; dose over-estimation problem; modeling; off-axis beam-softening; treatment planning; wedge attenuation coefficient; wedged photon beams; Attenuation; Collimators; Energy resolution; Lifting equipment; Medical treatment; Shape; Softening; Sun; System testing;
fLanguage
English
Publisher
ieee
Conference_Titel
Engineering in Medicine and Biology Society, 2000. Proceedings of the 22nd Annual International Conference of the IEEE
Conference_Location
Chicago, IL
ISSN
1094-687X
Print_ISBN
0-7803-6465-1
Type
conf
DOI
10.1109/IEMBS.2000.900436
Filename
900436
Link To Document