RT Journal Article SR Electronic T1 Tumor Imaging with I-131 Labeled F(ab’)2 Fragments of Monoclonal Antibodies JF Journal of Nuclear Medicine Technology JO J. Nucl. Med. Technol. FD Society of Nuclear Medicine SP 113 OP 114 VO 11 IS 3 A1 Romanelli-Beardsley, Michelle A. A1 Moldofsky, Philip J. A1 Mulhern, Charles B. YR 1983 UL http://tech.snmjournals.org/content/11/3/113.abstract AB Using radiolabeled F(ab’)2 fragments of monoclonal antibody associated with a noncirculating cell surface antigen of colon carcinoma, we have demonstrated preferential localization in small deposits of human colon carcinoma. (Images show tumor deposition without background subtraction.) Biologic distribution of the F(ab’)2 fragments is also evaluated. In 16 patients studied to date, tumor deposits as small as 1.5 cm have been readily visualized on unprocessed images without background subtraction. Optimal imaging time (tumors best defined) is 72-96 hr postadministration.