Fig. 2
From: A method to assess image quality for Low-dose PET: analysis of SNR, CNR, bias and image noise
Typical PET images (SUV: 0–6) with a lesion of CNR (=3.17) and volume (1.66 ml) at the different count level (5 realizations are displayed). Each column represents one realization. The count level corresponding to each row is 0.048 × 106, 0.16 × 106, 0.32 × 106, 0.48 × 106, 1.6 × 106, 3.2 × 106, 6 × 106, 1.2 × 107, 2.4 × 107, 4.8 × 107