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Device construction and method facilitating magnetic resonance imaging of foreign objects in a body

  • US 4,989,608 A
  • Filed: 04/28/1989
  • Issued: 02/05/1991
  • Est. Priority Date: 07/02/1987
  • Status: Expired due to Term
First Claim
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1. A device which is specifically useful during magnetic resonance imaging of body tissue comprising:

  • a flexible member of resinous material adapted to be inserted in the body tissue, the flexible member having ferromagnetic particles embedded therein at a concentration of about 0.001% to about 10% by weight of the material wherein, under magnetic resonance imaging, the flexible member exhibits characteristics which differ substantially from characteristics of the body tissue so that the visibility of the flexible member under magnetic resonance imaging is substantially enhanced, resulting in the flexible member being distinguishable from adjacent tissue as a dark area in brighter tissues and as a bright area in darker tissues, said member being free of elements which tend to degrade the overall quality of magnetic resonance images of the body tissues.

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