Fig. 7From: A method to assess image quality for Low-dose PET: analysis of SNR, CNR, bias and image noiseMinimum number of counts needed to keep (a) COV for SUVmean, (b) STE of SUVmean, (c) SUVmean bias, (d) COV based on SUVmax, (e) STE of SUVmax, and (f) SUVmax below a given percent level. VOIs in different regions are shown: background lungs (blue), liver (green), and TB lesions (red)Back to article page