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Proceedings Paper

Intraluminal laser atherectomy with ultrasound and electromagnetic guidance
Author(s): Kenton W. Gregory; H. Thomas Aretz; Michael A. Martinelli; Earl G. LeDet; G. Frederick Hatch; Richard E. Gregg; Tomas Sedlacek; Wayne C. Haase
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Paper Abstract

The MagellanTM coronary laser atherectomy system is described. It uses high- resolution ultrasound imaging and electromagnetic sensing to provide real-time guidance and control of laser therapy in the coronary arteries. The system consists of a flexible catheter, an electromagnetic navigation antenna, a sensor signal processor and a computer for image processing and display. The small, flexible catheter combines an ultrasound transducer and laser delivery optics, aimed at the artery wall, and an electromagnetic receiving sensor. An extra-corporeal electromagnetic transmit antenna, in combination with catheter sensors, locates the position of the ultrasound and laser beams in the artery. Navigation and ultrasound data are processed electronically to produce real-time, transverse, and axial cross-section images of the artery wall at selected locations. By exploiting the ability of ultrasound to image beneath the surface of artery walls, it is possible to identify candidate treatment sites and perform safe radial laser debulking of atherosclerotic plaque with reduced danger of perforation. The utility of the system in plaque identification and ablation is demonstrated with imaging and experimental results.

Paper Details

Date Published: 1 May 1991
PDF: 9 pages
Proc. SPIE 1425, Diagnostic and Therapeutic Cardiovascular Interventions, (1 May 1991); doi: 10.1117/12.44040
Show Author Affiliations
Kenton W. Gregory, Massachusetts General Hospital (United States)
H. Thomas Aretz, New England Deaconess Hospital (United States)
Michael A. Martinelli, Intra-Sonix, Inc. (United States)
Earl G. LeDet, Intra-Sonix, Inc. (United States)
G. Frederick Hatch, Intra-Sonix, Inc. (United States)
Richard E. Gregg, Intra-Sonix, Inc. (United States)
Tomas Sedlacek, Intra-Sonix, Inc. (United States)
Wayne C. Haase, Intra-Sonix, Inc. (United States)


Published in SPIE Proceedings Vol. 1425:
Diagnostic and Therapeutic Cardiovascular Interventions
George S. Abela, Editor(s)

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