UKMLA PLAB AMC USMLE Prometric MCQ

a) perfusion images are expected to detect completely occluded vessels 2mm in size
b) a pulmonary angiogram is usually recommended when pulmonary scintigraphy is undetermined
c) A normal perfusion scan virtually excludes PE
d) in a middle-aged individual a subsegmental perfusion defect with pleuritic chest pain in the same region is unlikely to be due to pulmonary embolism
e) pulmonary embolism is likely when there is a combination of indeterminate scans and evidence of DVT