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Table 1 Lung shunting fraction, uptake ratio for the spheres, and contrast-to-noise ratio for the four reconstruction methods and two scan times, together with the values as configured in the phantom

From: Accelerated SPECT image reconstruction with FBP and an image enhancement convolutional neural network

 LSF [%]Up. 2.0 mLUp. 4.1 mLUp. 8.1 mLUp. 15.7 mLCNR
True values5.22.72.72.77.7
5 minFBP6.40.50.81.04.16.5
CLINIC5.11.01.41.55.210.3
CNN4.71.72.32.06.612.1
MC5.82.02.32.26.511.0
20 minFBP5.30.50.81.04.16.6
CLINIC4.71.01.41.55.110.5
CNN5.11.92.32.37.212.5
MC5.22.02.22.26.511.6