Diagnostic pattern of radiotracer activity

What is the diagnostic pattern of radiotracer activity on a 99m Tc red blood cell (RBC) scan in a patient with a hemangioma in the liver?

The diagnosis of hemangiomas in the liver using a 99m Tc RBC scan is based on identifying a photopenic area in the liver on early images with gradual fill in and increased radiotracer activity seen on delayed images. The reported sensitivity for planar 99m Tc RBC imaging is approximately 55% and for tomographic 99m Tc RBC imaging is 88%.


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