Fig. 2
From: Simultaneous emission and attenuation reconstruction in time-of-flight PET using a reference object
Reconstructed emission and attenuation images, percentage difference maps of emission images, and percentage difference maps of attenuation images obtained with proposed MLAA reconstruction using one water-filled cylinder with different activity concentrations (A). A0 is the average activity concentration within the patient. True emission and attenuation images are also shown as a reference