PET Perfusion Tracers

	Rb-82	N13 ammonia
T 1/2	75 secs	10 mins
Dose/Injection Rate	20mCi Bolus <30secs BGO/LSO/GSO scanners	10-20mCi Bolus <30secs
Extraction Mechanism	Na/K ATPase pump Extraction decreases with increasing blood flow Can be decreased by hypoxia, acidosis and ischemia	Na/K transporter Passive diffusion
Type of stress used	Pharm stress (short t1/2 of Rb, patient needs to remain still in camera)	Pharm stress
Imaging delay after injection	EF>50%: 70-90secs EF <50%: 90-130 secs	1.5-3mins
Imaging duration	3-6 mins	10-15 mins
Reconstructed pixel size	4 mm	2-3 mm
Organ receiving maximum dose	Kidney	Urinary bladder