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Early dynamic SPECT acquisition for the imaging of hepatic hemangiomas utilizing Tc-99m labeled red blood cells
1Department of Radiology, Dartmouth Hitchcock Medical Center, Lebanon, New Hampshire 03755, USA.
Purpose:
To determine whether rapid, dynamic SPECT imaging with Tc-99m labeled red blood cells was technically feasible and of value in the detection of cavernous hemangiomas of the liver.
Materials And Methods:
The acquisition protocol for Tc-99m labeled red blood cell imaging of hepatic hemangiomas was modified with six sequential 3-minute SPECT images replacing the planar flow phase. Delayed 20-minute SPECT of the liver was then performed 2 hours later.
Results:
The authors present examples of pathologically proven positive and negative cases and retrospectively review their patient series. Examination of 19 patients with 41 lesions revealed no evidence of a false-positive examination results and only one false-negative result. Only one lesion seen to be positive with a 2-hour delayed study was not seen within 18 minutes. Lesions as small as 1.0 cm could be detected with a 3-minute SPECT.
Conclusions:
Rapid, dynamic early SPECT hemangioma imaging is feasible, provides images with relatively good quality, and can replace the planar flow phase.