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Radiochromic film: principle of detection

Film emulsion is a radiation sensitive monomer. The coloration process is based on

radiation-induced polymerization. The polymer is blue in color and film absorbs light in the

red part of visible spectrum.

OD is proportional to absorbed dose

Soares et al. chapter 23 AAPM Summer School, 2009

MD-55-2 15 Gy

EBT;1.5 Gy

Red light 635-700 nm

OD =-log

10

(T) =-log

10

(I

0

/I)