Journal of Medical Physics

Year
: 1996  |  Volume : 21  |  Issue : 1  |  Page : 14--20

Target Dose Modification In Irradiation Techniques With More Than Two Radiation Beams


P Geyer1, H Alheit2, N Christen3 
1 
2 
3 

Correspondence Address:
P Geyer


In some treatment protocols different parts of a target volume need to be irradiated with different doses. This can be achieved with a four-beam irradiation technique and dose rate modifying absorbers. The calculation of the transmission and thickness of the absorbers are based on the unmodified doses from single beam at a calculation point. Corrections are done by a modified graphic beam-zone method to consider the influence of the absorbers on scattered radiation. Phantom measurements show good agreement with the calculated values. The modification method is applicable without 3D planning systems but requires a small number of beams to limit the calculation and manufacture efforts.


How to cite this article:
Geyer P, Alheit H, Christen N. Target Dose Modification In Irradiation Techniques With More Than Two Radiation Beams.J Med Phys 1996;21:14-20


How to cite this URL:
Geyer P, Alheit H, Christen N. Target Dose Modification In Irradiation Techniques With More Than Two Radiation Beams. J Med Phys [serial online] 1996 [cited 2020 Jul 5 ];21:14-20
Available from: http://www.jmp.org.in/article.asp?issn=0971-6203;year=1996;volume=21;issue=1;spage=14;epage=20;aulast=Geyer;type=0