Skip to main content

Advertisement

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