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DETECTORS FOR MEASUREMENT-2D/3D detectors
Scanner homogeneity
pixel value varies with position on the
scanner plate
small effects (<1%) when moving films
vertically
up to 8% variation when moving films
horizontally, dose dependent
0,9273
0,9891
1
0,9859
0,9237
0,9992
0,9939
0,9933
1,0001
position
relative pixel
value
Scan direction
Densitometer-scanner
19
Utretch 2016
Effect of light source + scattering
2D correction for “full” films
Dose dependent
Scanner dependent
Paelink et al PMB 52 (2007) / Fuss et al PMB 52 (2007)
Scan direction