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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)