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Terms in this set (79)

Tc99m Sestamibi (Cardiolyte): Better image, No redistridution, pasive diffusion to mitochondria, hepatic excretion
Tc99m-TETRO (Myoview): similar to Cardiolyte
Protocol: Inject 8mCi at rest, (wait 30 min to clear intense liver) then image, reinject 24mCi on treadmilll at peak (wait 30 min to clear intense liver) the image. Higher dose w/ stress b/c we need to differentiate stress/rest and stress is more important
Thalium-201: HL = 72 hrs > limit dose (granier image) higher rads, uptake by NAK pump (active transport), redistributes (if viable), Alternate use: Tumor vs Rads necrosis brain (Tumor w/ uptake)
Protocol: Inject 3 mCi on treadmill at peak exercise, image at 10 min, wait 3 hrs to redistribute and image rest phase,
Dual Iso "hybrid" protocol: 4mCi of Thalium at rest, exercise and inject 25mCi of Tc and image 1-2 hr later. Advantage: quick, Disadvantage: comparing Thalium and Sestamibi
Use: Determine blood flow to the myocardium, detection of CAD, tracers are also nonspecific markers of infection / inflammation / neoplasm, rest injection an indicator of viability
ATTENUATION ARTIFACT: fixed defect w/ normal wall motion, diaphragmatic
SOURCE IMAGES: motion, potential attenuation artifacts, gross cardiac appearance, extracardiac uptake
SPECT: cavity size, regional defect fixed or reversible, if fixed is it mild / mod or severe (severe unlikly to be hibernating), transient ischemic dilitation indicates LV dysfunction
GATED SPECT: wall motion and EF, EF calculated using geometric mean ROI based on ESV & EDV
SPECT reconstruction: short, vertical long, horizoltal long
POLAR MAP: summary study w/ apex in center and base at periphery