What are the limitations of myocardial perfusion imaging for cardiac assessment?

Updated: Nov 20, 2018
  • Author: Richard S Krause, MD; Chief Editor: Barry E Brenner, MD, PhD, FACEP  more...
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A Tc-99m sestamibi scan exposes a patient to approximately 8 milliseverts (mSv) of radiation. This is roughly half the radiation exposure from a chest or abdomen CT scan. The thallium test exposure is approximately equal to that of a CT scan. [4]  Equivocal results may result from poor image quality. Interference by the breasts and diaphragm may also impair image quality in some patients.

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