Fig. 5
From: Simultaneous emission and attenuation reconstruction in time-of-flight PET using a reference object
Reconstructed emission and attenuation images and percentage difference maps of emission images obtained with proposed MLAA reconstruction with fixed attenuation values in air pixels. Reconstructed cases include using as reference object one water-filled cylinder with different activity concentrations (A) and one cylinder filled with reference activity concentration (A0) and materials with different attenuation coefficients (lung and bone)