| Contrast Agents I: Magnetic Resonance Imaging Contributor(s): Krause, Werner (Editor) |
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ISBN: 3642075967 ISBN-13: 9783642075964 Publisher: Springer OUR PRICE: $313.49 Product Type: Paperback - Other Formats Published: December 2010 |
| Additional Information |
| BISAC Categories: - Science | Chemistry - Analytic - Medical | Laboratory Medicine - Science | Chemistry - Organic |
| Dewey: 541 |
| Series: Topics in Current Chemistry |
| Physical Information: 249 pages |
| Descriptions, Reviews, Etc. |
| Publisher Description: Extracellular MRI and X-ray contrast agents are characterized by their phar- cokinetic behaviour.After intravascular injection their plasma-level time curve is characeterized by two phases. The agents are rapidly distributed between plasma and interstitial spaces followed by renal elimination with a terminal half-live of approximatly 1-2 hours. They are excreted via the kidneys in unchanged form by glomerular filtration. Extracellular water-soluble contrast agents to be applied for X-ray imaging were introduced into clinical practice in 1923. Since that time they have proved to be most valuable tools in diagnostics.They contain iodine as the element of choice with a sufficiently high atomic weight difference to organic tissue. As positive contrast agents their attenuation of radiation is higher compared with the attenuation of the surrounding tissue. By this contrast enhancement X-ray diagnostics could be improved dramatically. In 2,4,6-triiodobenzoic acid derivatives iodine is firmly bound. Nowadays diamides of the 2,4,6-triiodo-5-acylamino-isophthalic acid like iopromide (Ultravist, Fig. 1) are used as non-ionic (neutral) X-ray contrast agents in most cases 1]. |