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AbstractAbstract
[en] The localization characteristics of technetium Tc 99m plasmin were studied in experimental animals to investigate the use of 99mTc-plasmin for imaging inflammatory processes. At various times after abscess induction using turpentine in rats, the in vivo distribution properties of 99mTc-plasmin, gallium citrate Ga 67, 125I-fibrinogen, and 99mTc-human serum albumin (HSA) were studied by gamma-camera imaging. The in vivo binding of each radiopharmaceutical was also tested in rat and human plasma clots. Region-of-interest analyses of gamma-camera images showed relatively poor 99mTc-plasmin localization at sites of abscess formation. The ratio of abscess-to-control activity of this radiopharmaceutical did not exceed that of 67Ga, 125I-fibrinogen, or 99mTc-HSA. In vitro assays of each of the radiopharmaceuticals in plasma clots showed 99mTc-plasmin and 125I-fibrinogen to have the best localization characteristics. (orig.)
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ABSCESSES, ALBUMINS, BLOOD PLASMA, CHEMICAL REACTIONS, CITRATES, COMPARATIVE EVALUATIONS, DIAGNOSIS, FIBRINOGEN, FIBRINOLYSIN, GALLIUM 67, GALLIUM COMPOUNDS, IMAGES, IN VITRO, IN VIVO, INFLAMMATION, INTERNAL CONVERSION RADIOISOTO, IODINE 125, ISOMERIC NUCLEI, RADIOPHARMACEUTICALS, RATS, TECHNETIUM 99, TISSUE DISTRIBUTION, UPTAKE
ANIMALS, BETA DECAY RADIOISOTOPES, BETA-MINUS DECAY RADIOISOTOPES, BIOLOGICAL MATERIALS, BLOOD, BLOOD COAGULATION FACTORS, BODY FLUIDS, CARBOXYLIC ACID SALTS, COAGULANTS, DAYS LIVING RADIOISOTOPES, DISEASES, DISTRIBUTION, DRUGS, ELECTRON CAPTURE RADIOISOTOPES, ENZYMES, EVALUATION, GALLIUM ISOTOPES, GLOBULINS, HEMATOLOGIC AGENTS, HOURS LIVING RADIOISOTOPES, HYDROLASES, INTERMEDIATE MASS NUCLEI, IODINE ISOTOPES, ISOMERIC TRANSITION ISOTOPES, ISOTOPES, LABELLED COMPOUNDS, MAMMALS, MATERIALS, NUCLEI, ODD-EVEN NUCLEI, ORGANIC COMPOUNDS, PATHOLOGICAL CHANGES, PEPTIDE HYDROLASES, PROTEINS, RADIOACTIVE MATERIALS, RADIOISOTOPES, RODENTS, SERINE PROTEINASES, TECHNETIUM ISOTOPES, VERTEBRATES, YEARS LIVING RADIOISOTOPES
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