An ultrasound procedure that evaluates blood flow in an effort to determine the cause of a localized reduction in blood flow is:
A) Doppler sonography
B) positron emission tomography
C) myocardial radionuclide perfusion scan
D) angioscopy
A
Explanation: If you do not know the tests, break down the choices. The question indicates that sound is utilized, so the answer should have the root son and suffix -graphy, "recording process." Although perfusion, which is analysis of blood flow, is another choice, utilizing term breakdown, we see why sonography is correct.
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