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- 7.000.000 titres dans notre catalogue
- Payer en toute sécurité
- Toujours un magasin près de chez vous
Contrast Agents I
Magnetic Resonance Imaging
316,45 €
+ 632 points
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].
Spécifications
Parties prenantes
- Editeur:
Contenu
- Nombre de pages :
- 249
- Langue:
- Anglais
- Collection :
- Tome:
- n° 221
Caractéristiques
- EAN:
- 9783540422471
- Date de parution :
- 22-01-02
- Format:
- Livre relié
- Format numérique:
- Genaaid
- Dimensions :
- 163 mm x 242 mm
- Poids :
- 498 g
