NDLI: Image-guided phased array system for ultrasound thermotherapy

Content Provider	IEEE Xplore Digital Library
Author	VanBaren, P. Simon, C. Seip, R. Solf, T. Cain, C.A. Ebbini, E.S.
Copyright Year	1996
Description	Author affiliation: Dept. of Electr. Eng. & Comput. Sci., Michigan Univ., Ann Arbor, MI, USA (VanBaren, P.)
Abstract	An image-guided ultrasonic phased array system for non-invasive tissue ablation is described. Image guidance is provided by processing beamformed RF-data from a commercially available scanner. Two dimensional estimates of tissue temperature are obtained in real-time by implementing a high-speed displacement tracking algorithm. Experimental results validate our approach for image guidance in which the therapy array is initially driven at low (non-destructive) intensity sufficient to cause a small change in temperature at the focus. Two-dimensional non-invasive temperature data is then used to localize and assess the quality of the focus. If the extent and location of the focal spot are consistent with expected values, a high-intensity pulse capable of causing tissue ablation is delivered. Preliminary in-vitro beef muscle experiments are reported, showing successful visualization of the location and quality of the HIFU focus followed by an ablative pulse. Dissection revealed lesion formation (/spl sim/2 mm dia., 12 mm long, 30 mm deep within the tissue) at the expected location.
Starting Page	1269
Ending Page	1272
File Size	251095
Page Count	4
File Format	PDF
ISBN	0780336151
ISSN	10510117
DOI	10.1109/ULTSYM.1996.584226
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	1996-11-03
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Phased arrays Ultrasonic imaging Medical treatment Focusing Phase estimation Temperature distribution Electromagnetic heating Real time systems Lesions Thermal expansion
Content Type	Text
Resource Type	Article

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