Technetium-99m Red Blood Cell Venography of the Lower Limb in Symptomatic Pulmonary Embolization

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Abstract
TC-99m RBC venography of the legs was obtained in 42 patients with primary pulmonary symptomatology and a diagnosis of pulmonary embolization. In 31 of these 42 patients (74%), the nuclear venogram revealed the presence of deep vein thrombosis (DVT) and a source of embolization. Of the 31 patients with leg DVT documented by venography, 13 (42%) showed thrombosis confined to the calf. Clinical findings suggested that only 20 of the 31 patients (65%) with DVT could have harboured a source of embolization in the legs. Tc-99m RBC venography is a useful noninvasive test for the global and comprehensive assessment of patients with sympatomatic pulmonary embolization.