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Contrast enhancing agent having a polymeric core and polymeric shell

  • US 6,270,748 B1
  • Filed: 01/18/2000
  • Issued: 08/07/2001
  • Est. Priority Date: 01/19/1999
  • Status: Expired due to Fees
First Claim
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1. An image enhancing agent comprising:

  • a polymeric core having an image-enhancing compound chemically bound thereto; and

    a polymeric shell surrounding said core and compound, wherein said core comprises a polymer formed from a monomer mixture comprising between 10 and 90% acid monomer, and 10 and 90% esterified monomer, and wherein said compound is a metal that binds to acidic regions in said core.

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