Title :
Invasive and non-invasive feedback for ultrasound phased array thermometry
Author :
Seip, Ralf ; Ebbini, Emad S.
fDate :
Oct. 31 1994-Nov. 3 1994
Abstract :
The use of high-intensity focused ultrasound for cancer therapy and tissue ablation has been receiving increased attention recently. Currently, fine-wire thermocouple sensors represent the only practical means of feedback for these treatments. Difficulties in placing thermocouples in many clinical situations represent a major limitation on the amount of feedback that can be obtained with these versatile sensors. For this purpose, invasive and non-invasive feedback methods for ultrasound thermotherapy have been developed. Invasive methods for acoustic feedback are based on implantable hydrophone arrays, and non-invasive methods for temperature feedback are based on signal processing of the backscattered diagnostic ultrasound pulse. Experimental results demonstrating quantitative, non-invasive, tissue temperature change measurements are shown. The methods for temperature change estimation presented are independent of the heating modality
Keywords :
acoustic signal processing; biomedical equipment; biomedical ultrasonics; biothermics; feedback; hydrophones; hyperthermia; radiation therapy; temperature measurement; ultrasonic focusing; ultrasonic scattering; ultrasonic transducer arrays; acoustic feedback; backscattered diagnostic ultrasound pulse; cancer therapy; clinical situations; feedback; fine-wire thermocouple sensors; heating modality; high-intensity focused ultrasound; implantable hydrophone arrays; invasive feedback; noninvasive feedback; signal processing; temperature feedback; tissue ablation; tissue temperature change measurements; ultrasound phased array thermometry; ultrasound thermotherapy; Ablation; Acoustic arrays; Acoustic scattering; Acoustic signal processing; Biological thermal factors; Biological tissues; Biomedical applications of acoustic radiation; Biomedical transducers; Cancer; Hydrophones; Hyperthermia; Implantable biomedical devices; Output feedback; Phased arrays; Temperature measurement;
Conference_Titel :
Ultrasonics Symposium, 1994. Proceedings., 1994 IEEE
Conference_Location :
Cannes, France
Print_ISBN :
0-7803-2012-3
DOI :
10.1109/ULTSYM.1994.401944