Table 6 Techniques used in CF determination from the experimental and simulated data
From: Determination of gamma camera calibration factors for quantitation of therapeutic radioisotopes
Config. | CF | Definitions | ||
|---|---|---|---|---|
Counts | Time | Activity | ||
Phantom experiments | ||||
 A | CFPWSC | Count in PW corrected for scatter using TEW: CPWSC | Scan time: t | Small source activity: A |
 B | \( {\mathrm{CF}}_R^B \) | Total counts in the image reconstructed with AC + SC: C R | Number of projections multiplied by the projection duration: n p t p | Total activity in spheres: A |
 C | \( {\mathrm{CF}}_R^C \) | Total phantom activity (spheres+bkg): A | ||
 D | \( {\mathrm{CF}}_R^D \) | Total activity in phantom: A | ||
Simulation experiments | ||||
 A | CFPWSCsim | Count in PW corrected for scatter using TEW: CPWSCsim | Total number of simulated decays: N tot | |
CFPPsim | Primary photons simulated in PW: CPPsim | |||
 B | \( {\mathrm{CF}}_{R\mathrm{sim}}^B \) | Total counts in the image that was reconstructed from PW with AC + SC: CRsim | Number of projections multiplied by number of decays simulated in each projection: n p N tot | |
\( {\mathrm{CF}}_{R\mathrm{PPsim}}^B \) | Total counts in the image reconstructed from primary photons only with AC: CRPPsim | |||
 C | \( {\mathrm{CF}}_{R\mathrm{sim}}^C \) | Total counts in the image that was reconstructed from PW with AC + SC: CRsim | ||
\( {\mathrm{CF}}_{R\mathrm{PPsim}}^C \) | Total counts in the image reconstructed from primary photons only with AC: CRPPsim | |||
 D | \( {\mathrm{CF}}_{R\mathrm{sim}}^D \) | Total counts in the image that was reconstructed from PW with AC + SC: CRsim | ||