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Intraluminal radiation treatment system

  • US 6,610,003 B1
  • Filed: 11/19/1999
  • Issued: 08/26/2003
  • Est. Priority Date: 09/23/1996
  • Status: Expired due to Term
First Claim
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1. In a system used for the intraluminal treatment of a selected site in the body including a catheter adapted for intraluminal positioning in the body and a transfer device external to the body for storing one or more treating elements and introducing the treating elements into the catheter, a method for detecting whether the treating elements reside within the transfer device comprising:

  • encapsulating the treating elements in a material having known reflectivity characteristics;

    shining first and second lights of different wavelengths and having known reflected intensities into an area in the transfer device where the treating elements are stored before and after being introduced into the catheter;

    measuring the reflected intensities of the first and second lights reflected off of the area in the transfer device;

    forming a ratio of the reflected intensities of the reflected first and second lights;

    comparing the ratio of the reflected intensities of the reflected first and second lights with the known reflectivity characteristics of the encapsulating material for the treating elements;

    determining whether the measured ratio of reflected intensities is substantially the same as the known reflectivity characteristics; and

    indicating whether the treating elements reside within the transfer device.

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