DIAGNOSTIC ACCURACY OF SPECT VENTILATION-PERFUSION SCAN VS CT PULMONARY ANGIOGRAPHY IN HIGH RISK PATIENTS FOR PULMONARY EMBOLISM

PURPOSE: In many centers, multi-detector CTA has replaced V/Q scanning for the initial evaluation of pulmonary embolism. High risk patients for PE with a non-diagnostic CTA require additional testing. The PIOPED study showed that standard V/Q scans are indeterminate in up to two thirds of patients. Therefore, we compared the efficacy of spect V/Q scans to CTA in patients with a high clinical suspicion of PE.