摘要:
Treated apatite particles are disclosed for enhancing medical diagnostic imaging such as magnetic resonance imaging ("MRI"), magnetic resonance spectroscopy ("MRS"), magnetic resonance spectroscopy imaging ("MRSI"), X-ray diagnostic imaging, and ultrasound imaging. Novel coating and manufacturing techniques are disclosed to control particle size and particle aggregation resulting in compositions for organ specific imaging of the liver, spleen, gastrointestinal tract, or tissue disease states is obtained. Depending on the diagnostic imaging technique, apatite particles are treated to be paramagnetic, radiopaque, or echogenic. The apatite particles may also be fluorinated to form stable fluoroapatite compositions useful for .sup.19 F imaging. Also disclosed are diagnostic compositions and methods of performing medical diagnostic procedures which involve administering to a warm-blooded animal a diagnostically effective amount of the above-described apatite particles and then performing the medical diagnostic procedure.
摘要:
The compound N-(2,3-dihydroxypropyl)-5-[N-(2-hydroxyethyl)-glycolamido]-N'-methyl-2,4,6-triiodoisophthalamide and similar such compounds may be used as x-ray contrast agents which are water-soluble, safe and in an aqueous solution are non-viscous. Methods of preparing N-(2,3-dihydroxypropyl)-5-[N-(2-hydroxyethyl)-glycolamido]-N'-methyl-2,4,6-triiodoisophthalamide and the analogous compounds are provided.
摘要:
The use of reverse osmosis as an alternative or substitute method for the purification of a crude diagnostic agent. In the purification process a crude Ioversol solution is contacted with a cross-linked membrane under pressure, forcing the low molecular weight impurities within the crude Ioversol solution through the membrane pores and retaining Ioversol molecules.
摘要:
The use of a minimal excess of acetoxyacetylchloride as a reagent in the synthesis of N,N'-bis(2,3-dihydroxypropyl)-5-N-(2-hydroxy-ethyl)glycolamido-2,4,6-triiodoisophthalamide.
摘要:
The use of reverse osmosis as an alternative or substitute method for the purification of a crude diagnostic agent. X-ray contrast agent, magnetic resonance imaging agent, or radiopharmaceuticals are purified by passing through a cross-linked reverse osmosis membrane.
摘要:
The compound N-(2,3-dihydroxypropyl)-5-[N-(2-hydroxyethyl)-glycolamido]-N'-methyl-2,4,6-triiodoisophthalamide and similar such compounds may be used as x-ray contrast agents which are water-soluble, safe and in an aqueous solution are non-viscous. Methods of preparing N-(2,3-dihydroxypropyl)-5-[N-(2-hdyroxyethyl)glycolamido]-N'-methyl-2,4,6-triiodoisophthalamide are provided.
摘要:
Processes for manufacturing diethylenetriaminepentaacetic acid ("DTPA") bis(amide) magnetic resonance imaging ("MRI") agents are disclosed. Specifically, processes for manufacturing [N,N"-Bis[N-(2-methoxyethyl)carbamoylmethyl]diethylenetriamine-N,N',N"-triacetato]gadolinium(III) are disclosed.
摘要:
Complexes of iron(II), iron(III), manganese(II), manganese(III), gadolinium(III) or chromium(III) and a compound of the formula: ##STR1## wherein m=2, 3, 4, or 5, are useful for enhancing magnetic resonance images of body organs and tissues, such as magnetic resonance images of the hepatobiliary system. An illustrative complex of this type is monosodium [ethylenediamine-di(o-hydroxyphenylaceto)]iron(III) hydrate.
摘要:
A process for the preparation of iosimenol comprising reacting 5,5′-[(1,3-dioxo-1,3-propanediyl)diimino]bis[N-(2,3-dihydroxypropyl)-2,4,6-triiodo-1,3-benzenedicarboxamide] (C-VI) with a 3-halo-1,2-propanediol in an aqueous solvent. A process for the preparation of C-VI comprising reacting 3,3′-[(1,3-dioxo-1,3-propanediyl)diimino]bis[5-(aminocarbonyl)-2,4,6-triiodobenzoyl chloride] (C-V) with 3-amino-1,2-propanediol in the presence of an inorganic base and a suitable non-aqueous polar solvent. A process for the preparation of C-V comprising reacting 3-amino-5-(aminocarbonyl)-2,4,6-triiodobenzoyl chloride (C-IV) with malonyl dichloride in a solvent comprising a suitable ester solvent, a suitable nitrile solvent or mixtures thereof.
摘要:
An improved process for the reversed phase chromatographic decolorization, separation, and purification of water-soluble, nonionic contrast media compounds from solutions containing nonionic compound impurities involves the steps of (a) packing a chromatographic column with a chromatographic packing material; (b) passing through the column a solution containing a water-soluble, nonionic contrast media compound and nonionic compounds as impurities at a loading ratio between approximately 10 to 1 and 1.5 to 1 wt. packing material/total wt. nonionic compounds; and (c) eluting the column to produce an eluate containing substantially pure, water-soluble, nonionic contrast media compound or MRI agent. The process can be economically practiced on a factory scale and efficiently removes non-polar impurities difficult to remove by conventional methods.