Fig. 1
From: A method to assess image quality for Low-dose PET: analysis of SNR, CNR, bias and image noise
a The SNR2 in the liver for all the reconstructed images; (b) The SNR2 in the liver for the images reconstructed with fewer than 20 × 106 true counts; (c) The SNR2 in the liver for the images reconstructed with fewer than 1 million true counts; (d) The composite sensitivity factor Ki for all subjects and the corresponding fitted curve; (e) The corrected SNR2 in the liver for the images reconstructed with fewer than 20 million true counts and the linearly fitted curve; (f) The corrected SNR2 in the liver for the images reconstructed with raw data less than 1 × 106 true counts and the linearly fitted curve