Charge neutral complexes of paramagnetic metals as...

Drug – bio-affecting and body treating compositions – In vivo diagnosis or in vivo testing – Magnetic imaging agent

Reexamination Certificate

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C424S001110, C424S001650, C424S009100, C424S009300, C424S009360

Reexamination Certificate

active

07419654

ABSTRACT:
A contrast agent for magnetic resonance imaging comprising a complex of a paramagnetic cation, preferably Gd+3, Dy+3, and Fe+3with three equivalents of a charge neutralizing chelator that provides a lipid soluble complex of the paramagnetic cation is described. The complex is retained intracellularly when introduced into a mammalian cell. A method of providing an image of an internal pathology of a patient by magnetic resonance imaging (MRI) by administering the MRI contrast agent or tagged cells to the patient and scanning the patient using magnetic resonance imaging to obtain visible images of the internal pathology of the patient is also set forth.

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