Journal of Medical Physics

Year
: 1991  |  Volume : 16  |  Issue : 4  |  Page : 5--6

Determination Of Virtual Source Position Of Electron Beams From A Dual Energy Liner Accelerator


Anil.K Sharma1, Sanjay.S Supe2, Saithya.vK Narayanan3 
1 
2 
3 

Correspondence Address:
Anil.K Sharma


Electron beams from an accelerator appear to come from a point in vacuum designated as virtual source that lies at a distance not coinciding with the scattering foil or the beam exit window. This is due to the influence of the various scattering processes taking place in the foils, collimator and the electron applicator apart from the fringe magnetic fields in the blending magnet. Virtual source to isocentric distances are experimentally determined by measurements made in a polystyrene phantom using an ionization chamber and applying inverse square law. The results for the narrow and broad beam geometry are presented for the electron beams available with Clinac-1800.


How to cite this article:
Sharma A, Supe S, Narayanan S. Determination Of Virtual Source Position Of Electron Beams From A Dual Energy Liner Accelerator.J Med Phys 1991;16:5-6


How to cite this URL:
Sharma A, Supe S, Narayanan S. Determination Of Virtual Source Position Of Electron Beams From A Dual Energy Liner Accelerator. J Med Phys [serial online] 1991 [cited 2020 Jul 5 ];16:5-6
Available from: http://www.jmp.org.in/article.asp?issn=0971-6203;year=1991;volume=16;issue=4;spage=5;epage=6;aulast=Sharma;type=0