Technetium-99m-labeled macroaggregated albumin lung perfusion scan for diagnosis of hepatopulmonary syndrome: A prospective study comparing brain uptake and whole-body uptake

Table 4 Utility of macroaggregated albumin lung perfusion scan for detecting intrapulmonary vascular dilatations

	Sensitivity, %	Specificity, %	PPV, %	NPV, %	Accuracy, %
CEE	100	86	81	100	91
Brain-lung uptake > 6%	19	92	67	58	59
Brain-lung uptake > 5.7%	23	89	64	58	59
Whole-body uptake > 42.5%	100	52	65	100	74

MAA: Technetium-99m-labeled macroaggregated albumin; IPVD: Intrapulmonary vascular dilatations; CEE: Contrast-enhanced echocardiography; PPV: Positive predictive value; NPV: Negative predictive value.