Fig. 4
From: The magnitude of the partial volume effect in SPECT imaging of the kidneys: a phantom study
Measured recovery coefficients of each phantom. Measured recovery coefficients (RCs) of each phantom in the study for any combination of the target-to-background ratio and iteration number (green points, 36 iterations; blue triangles, 72 iterations). Values for the whole-parenchyma and cortex-only kidney phantoms are shown in left and right subfigures, respectively. The solid horizontal line for each group represents the mean; the associated whiskers indicate plus/minus one standard deviation. Additionally, the result of the nonparametric testing is provided. Two asterisks (**) indicate a statistically significant difference with a p < 0.01, not significant (n.s.) indicates that a statistically significant difference was not found. Test results between the RCs of reconstructions with different iteration numbers are displayed above data points. Test results between RCs at different TBRs are shown below the data points. Values were obtained for LEHR collimation and the radionuclide 99mTc