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  • Title: Preparation and use of 123I-labeled highly iodinated fibrinogen for imaging deep-vein thrombi.
    Author: Harwig JF, Welch MJ, Coleman RE.
    Journal: J Nucl Med; 1976 May; 17(5):397-400. PubMed ID: 1262945.
    Abstract:
    A method for producing protein-iodination-grade 123I suitable for use with a compact bio-medical cyclotron is reported. The preparation of highly iodinated fibrinogen (25 123I atoms per molecule) is described, and its successful use as a thrombus-imaging agent in experimental animals is reported. This new agent clears from the blood faster than conventional radioiodinated fibrinogen and gives higher thrombus-to-blood activity ratios. Thus, the detection of deep-vein thrombi in areas of large blood pool is enhanced, and images can be obtained sooner after administration of the radiopharmaceutical. Induced 4--8-hr-old femoral-vien thrombi in dogs can be well visualized with a scintillation camera as early as 4 hr and as late as 15 hr after administration of 1 mCi of 123I-labeled highly iodinated fibrinogen.
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