Fig. 5

Contrast Recovery (CRC = measured image contrast/theoritical contrast) as a function of sphere diameter, acquisition time (PET100, PET50 and PET33) and SubtlePET application (PET50 + SP and PET33 + SP) for the 3 PET systems (1st row: DMI; 2nd row: D710 and 3rd row: IQ4) and 2 contrasts (1st column:5:1 and 2nd colomn:2:1)