Enhanced MRI of tumors utilizing a new nitroxyl spin label contrast agent
| Autor: | George E. Wesbey, Thomas N. Tozer, Robert C. Brasch, Richard D. Williams, M T McNamara, Kirk L. Moon, William R. Couet, R L Ehman |
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| Rok vydání: | 1985 |
| Předmět: |
Male
Pathology medicine.medical_specialty Magnetic Resonance Spectroscopy Urinary system Transplantation Heterologous Biomedical Engineering Biophysics Contrast Media Cyclic N-Oxides chemistry.chemical_compound In vivo medicine Animals Humans Radiology Nuclear Medicine and imaging Spin label Carcinoma Renal Cell medicine.diagnostic_test Chemistry Skeletal muscle Rats Inbred Strains Nitroxyl Magnetic resonance imaging Kidney Neoplasms Rats Intensity (physics) medicine.anatomical_structure Spin echo Oxidation-Reduction Neoplasm Transplantation |
| Zdroj: | Magnetic Resonance Imaging. 3:89-97 |
| ISSN: | 0730-725X |
| DOI: | 10.1016/0730-725x(85)90013-x |
| Popis: | Nitroxyl spin labels have been shown to be effective in vivo contrast agents for magnetic resonance imaging (MRI) of the central nervous system, myocardium, and urinary tract. A new pyrrolidine nitroxyl contrast agent (PCA) with better resistance to in vivo metabolic inactivation than previously tested agents was studied for its potential to enhance subcutaneous neoplasms in an animal model. Twenty-two contrast enhancement trials were performed on a total of 15 animals 4–6 weeks after implantation with human renal adenocarcinoma. Spin echo imaging was performed using a .35 T animal imager before and after intravenous administration of PCA in doses ranging from 0.5 to 3 mM/kg. The intensity of tumor tissue in the images increased an average of 35% in animals receiving a dose of 3 mM/kg. The average enhancement with smaller doses was proportionately less. Tumor intensity reached a maximum within 15 min of injection. The average intensity difference between tumor and adjacent skeletal muscle more than doubled following administration of 3 mM/kg of PCA. Well-perfused tumor tissue was more intensely enhanced than adjacent poorly perfused and necrotic tissue. |
| Databáze: | OpenAIRE |
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