2017 Imaging for Physicists Coursebook

4D PET-CT

free-breathing

• Acquire CT and PET signal with a signal reflecting the repiratory motion • PET signal is sampled in 10 bins of ~0.5 s • Reduced motion-induced blurring decreased the observed tumor volume by as much as 43% • SUV values inside the tumor increase

gated

Nehmeh et al. 2004; Med. Phys. 31:3179-3186