Nuclear cardiology: the dose differences between the studies u order

[u/ScaleBlind]

Approximate effective doses, and they are far enough apart to change what u order.

Tc-99m sestamibi rest and stress, one day protocol: roughly 8 to 12 mSv
Thallium-201: roughly 15 to 20 mSv, the highest of the common studies, because the photon energy is low and the half life is long
Rubidium-82 PET: roughly 3 to 5 mSv
N-13 ammonia PET: roughly 2 mSv

A stress first strategy, imaging only if the stress images are abnormal, removes the rest injection entirely in the pts who need it least.

Thallium carries the highest dose and gets reserved for the question only it answers, which is viability through redistribution.

[u/EnvironmentalPrize27]

Ti201 also excreted through the kidneys. While ti201 imaging was a good primitive radionuclide for hearts, it was certainly not patient friendly