Scanner matching (1): find parameter for matching
Calculated PARs for all “NRPB” scanners for which CTDI values were available
Calculated effective doses using CTDOSE software for head and body examinations on “NRPB” scanners
Input all values into multi-variate analysis software
Obtained following coefficient values:
For head scans: a = 0.47; b = 0.80; c = 0.075
For abdo scans: a = 3.58; b = 0.63; c = -0.090
ImPACT Factor = a. PARc + b. PARp + c
- Calculated ImPACT Factors for each NRPB scanner
for a head and body examination