Figure 1 PET acquisition protocol for ¹³N phantom study.

Schematic presentation for PET acquisition protocol. A 10 mL of vial imitating small left ventricle filled with approximately 1500 MBq of ¹³N was measured by Curie-meter prior to PETCT acquisition for each set, then placed in the one side of the standard thyroid uptake phantom. A single session of PETCT scan consisted of a combination of 60 sec list-mode acquisition and 60 sec standby, and was repeated 31 times for a set, totally 62 min for each day. Theoretical dose for each time point was computed by ¹³N radio-active decay from the firstly measured activity by curie meter. A single set was repeated for 6 days.