The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 09, 2002
Filed:
Sep. 28, 2000
Eric D. Nielson, Bellevue, WA (US);
SciMed Life Systems, Inc., Maple Grove, MN (US);
Abstract
A radiation delivery system including a catheter shaft having a distal head. A fixed or removable radiation source is disposed adjacent the distal head. The distal head includes a radiation shield having a window and an ultrasonic transducer. The ultrasonic transducer provides a signal indicative of relative position, tissue geometry and/or tissue characteristics, which may be utilized to determine the appropriate placement of the radiation shield window such that only selected portions of the treatment site are exposed to radiation. The radiation delivery system may include a drive means coupled to the distal head to facilitate rotation thereof. The rotatable head may be rotated at a constant velocity or at a velocity which varies as a function of the signal (e.g., distance from the vascular wall and/or stenotic thickness).