In patients suspected of having pulmonary emboli in which noninvasive studies do not give a definite diagnosis, what diagnostic procedure is the test of choice?
a. CT
b. MRI
c. Pulmonary angiography
d. scan
ANS: C
For the one-third of patients who do not receive a definitive diagnosis on the basis of the results of noninvasive studies, pulmonary angiography is the test of choice.
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