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Main 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].
Contents:
Extracellular MRI Contrast Agents Based on Gadolinium.- Structures of MRI Contrast Agents in Solution.- Relaxivity of MRI Contrast Agents.- Kinetic Stabilities of Gadolinium(III) Chelates Used as MRI Contrast Agents.- New Classes of MRI Contrast Agents.- Non-Gadolinium-Based MRI Contrast Agents.- Blood-Pool MRI Contrast Agents: Properties and Characterization.
PRODUCT DETAILS
Publisher: Springer (Springer-Verlag Berlin and Heidelberg GmbH & Co. K)
Publication date: December, 2010
Pages: 259
Weight: 445g
Availability: Available
Subcategories: Biochemistry, General Issues
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