DocumentCode :
3459841
Title :
Image-guided phased array system for ultrasound thermotherapy
Author :
VanBaren, P. ; Simon, C. ; Seip, R. ; Solf, T. ; Cain, CA ; Ebbini, E.S.
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., Michigan Univ., Ann Arbor, MI, USA
Volume :
2
fYear :
1996
fDate :
3-6 Nov 1996
Firstpage :
1269
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 (~2 mm dia., 12 mm long, 30 mm deep within the tissue) at the expected location
Keywords :
biomedical equipment; biomedical ultrasonics; hyperthermia; muscle; radiation therapy; ultrasonic focusing; ultrasonic transducer arrays; 12 mm; 2 mm; HIFU focus; ablative pulse; dissection revealed lesion formation; focal spot; focus; high-intensity pulse; high-speed displacement tracking algorithm; image-guided phased array system; image-guided ultrasonic phased array system; in-vitro beef muscle experiments; low nondestructive intensity; noninvasive tissue ablation; processing beamformed RF-data; real-time; therapy array; tissue ablation; tissue temperature; two dimensional estimates; two-dimensional noninvasive temperature data; ultrasonic phased array system; ultrasound thermotherapy; visualization; Electromagnetic heating; Focusing; Lesions; Medical treatment; Phase estimation; Phased arrays; Real time systems; Temperature distribution; Thermal expansion; Ultrasonic imaging;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Ultrasonics Symposium, 1996. Proceedings., 1996 IEEE
Conference_Location :
San Antonio, TX
ISSN :
1051-0117
Print_ISBN :
0-7803-3615-1
Type :
conf
DOI :
10.1109/ULTSYM.1996.584226
Filename :
584226
Link To Document :
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