Tc-99m macro aggregated albumin scintigraphy – indications other than pulmonary embolism: A pictorial essay
A 21-year-old male patient with sudden onset dyspnea was referred for ventilation perfusion scan to look for pulmonary embolism. In view of the acute presentation and no risk factors, a simultaneous venography study using Tc MAA was scheduled. Tc-99m MAA was injected simultaneously through bilateral pedal veins as part of pulmonary perfusion scan to look for deep vein thrombosis. Whole body images showed significant collateral vessels with associated anteromedial basal segmental lung perfusion defect in the left lung [Figures and ]. Later doppler study of bilateral lower limbs confirmed subacute thrombus involving left iliac and left common femoral veins.