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PRIOR EBT GAFCHROMIC FILMS
[HD-810; MD-55-2; HS]
Low sensitivity
Small size
Inherent optical density non-uniformity in one
sheet (15%)
[Need of double-exposure]
High price
POST EBT GAFCHROMIC FILMS (2004)
[EBT;EBT2;EBT3]
Dose range 2cGy – 8 Gy
Saturation ~ 10Gy (15Gy)
Different sizes available
Z
eff
~ 7.05 (chlorine addition)
Significant better homogeneity
[no need of double-exposure techniques]
Lower price
Radiochromic film evolution…