Physics Bucharest 2017

SSD

Diodes

Although an appropriate calibration factor N D is established for each beam energy, correction factors are required for a diode reading R diode :

pts.thickness

D

= R

· N

· C

· C pts.thikness

· C field

diode

diode

D

SSD size

field size

May be acceptable with no correction Meijer GJ, et.al. Int J Radiat Oncol Biol Phys . 49:1409-18, 2001.