Use of chelate complexes
    6.
    发明公开
    Use of chelate complexes 失效
    Anwendung von Chelat-Komplexen。

    公开(公告)号:EP0463644A2

    公开(公告)日:1992-01-02

    申请号:EP91116072.9

    申请日:1987-07-25

    IPC分类号: A61K49/00 G01R33/28

    摘要: The disclosure provides the use of a physiologically compatible chelate complex of a chelating compound and a paramagnetic ion of a lanthanide element having an atomic number in the range 57 to 70 or of a transition metal having an atomic number selected from 21 to 29, 42 and 44 and of a non-paramagnetic organic calcium salt for the preparation of a magnetic resonance imaging contrast medium by admixture of said complex and said organic salt. The admixed calcium serves to enhance the biotolerability of the paramagnetic chelate containing MRI contrast medium.

    摘要翻译: 本发明提供螯合化合物和原子序数在57至70范围内的镧系元素的顺磁性离子或具有选自21至29,42的原子序数的过渡金属的生理上相容的螯合络合物和 44和非顺磁性有机钙盐,用于通过所述配合物和所述有机盐的混合来制备磁共振成像造影剂。 混合的钙用于增强含有MRI造影剂的顺磁性螯合物的生物适应性。

    DIAMIDE-DTPA-PARAMAGNETIC CONTRAST AGENTS FOR MR IMAGING, APPARATUS AND METHODS
    7.
    发明授权
    DIAMIDE-DTPA-PARAMAGNETIC CONTRAST AGENTS FOR MR IMAGING, APPARATUS AND METHODS 失效
    用于磁共振成像的DIAMIDE-DTPA-PARAMAGNETIC对比剂,装置和方法

    公开(公告)号:EP0203962B1

    公开(公告)日:1991-05-02

    申请号:EP85905998.2

    申请日:1985-11-12

    申请人: SALUTAR, INC.

    发明人: QUAY, Steven, G.

    IPC分类号: A61K49/00 A61B5/05 C07F15/00

    摘要: Homologs of Diamide-DTPA-Paramagnetic compounds (such as diamido acetyl diethylene triamine triacetic acid) provide excellent contrast agents for magnetic resonance (MR) imaging. The magnetic dipole generated by the unpaired electron within the paramagnetic (PM) atom, causes a local reduction in the bulk magnetic field of the MR system. The resulting shortening of the T1 (spin lattice) relaxation time in the local hydrogen protons within the area of interest, causes an intense "free induction signal" and a corresponding modulation in the collected scanning data. The tissue or organ of interest appears on the MR display highlighted in white. Background tissue is displayed as darker or lower intensity greys. A surface highlighted image of the small and large intestine may be obtained by venous injection of the diamide contrast agent. The contrast agent is formed by replacing two carboxylic acids on the DTPA chelator with functional amide groups. The homologs enable the Diamide-DTPA-PM contrast agents to go into solution readily, and promote organ selectivity.