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Radiation or drug delivery source with activity gradient to minimize edge effects

  • US 7,862,495 B2
  • Filed: 05/31/2001
  • Issued: 01/04/2011
  • Est. Priority Date: 05/31/2001
  • Status: Expired due to Fees
First Claim
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1. An apparatus to deliver a therapeutic agent to a vessel, comprising:

  • an elongated source of a therapeutic agent, the source having an amount or a concentration of the therapeutic agent that gradually decreases along a length of the elongated source from a location inward of a proximal end or at the proximal end of the elongated source, or from a location inward of a distal end or at the distal end of the elongated source.

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