Dynamic vascular scintiphotography of the liver

The lack of specificity of a focal defect present on a conventional radiocolloid liver scan remains a significant limitation of the examination. The administration of a small volume, high-activity, i.v. bolus of radioactivity to a patient studied with a scintillation camera permits the assessment of the vascularization of such lesions. This technique has been used to study 32 patients with abnormal liver scans. Vascular lesions may be differentiated from avascular processes. Cirrhotic pseudomasses may be distinguished from superimposed hepatomas. When used in conjunction with other types of imaging agents such as ⁷⁵Se-seleno-methionine or ⁶⁷Ga, one may obtain useful information concerning the possible etiology of hepatic focal defects from the dynamic vascular study.