Dose Course 2018_Flipping book

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.

MD-55-2 15 Gy

EBT;1.5 Gy

Red light 635-700 nm

Soares et al. chapter 23 AAPM Summer School, 2009

OD =-log

(T) =-log

(I

/I)

10

10

0

OD is proportional to absorbed dose