Table 1 Fitting parameter values of the function for regression (Eq. (3): D = a × ΔI + b × ec×ΔI)) obtained for the relationships between the black (K) component intensity and X-ray dose of six combinations: two Gafchromic films (EBT3 and EBT-XD) and three portable colorimeters (NixP, NixS and SpoP).
From: Comparative study on measurements of radiochromic films using portable colorimeters
Radiochromic film | Portable colorimeter | Parameter value | ||
|---|---|---|---|---|
a | b | c | ||
EBT3 | NixP | 0.0673 | 0.00859 | 0.126 |
NixS | 0.0676 | 0.00728 | 0.143 | |
SpoP | 0.125 | 0.0179 | 0.213 | |
EBT-XD | NixP | 0.224 | 0.173 | 0.114 |
NixS | 0.200 | 0.365 | 0.104 | |
SpoP | 0.333 | 0.377 | 0.185 | |
