Title :
Variable-focus lens for ultrasound hyperthermia applications
Author :
Yoon, Y.J. ; Barthe, P.G. ; Benkeser, P.J.
Author_Institution :
Sch. of Electr. Eng., Georgia Inst. of Technol., Atlanta, GA, USA
Abstract :
The authors investigate the characteristics of a variable-focus ultrasonic liquid-lens hyperthermia applicator. This type of lens provides a better dynamic focusing capability for either single-element or linear phased-array transducers. The curvature of the lens is determined by the volume of liquid in the lens. Two types of ultrasonic liquid-lens hyperthermia applicators were investigated. The first type employs a spherical liquid lens and a unfocused square-aperture transducer. The second type combines a linear phased-array transducer with the spherical liquid lens
Keywords :
biomedical equipment; biomedical ultrasonics; biothermics; lenses; radiation; ultrasonic equipment; dynamic focusing capability; linear phased-array transducer; liquid volume; spherical liquid lens; therapeutic ultrasound; ultrasound hyperthermia; unfocused square-aperture transducer; variable focus lens; Absorption; Apertures; Applicators; Hyperthermia; Lenses; Liquids; Phased arrays; Ultrasonic imaging; Ultrasonic transducers; Ultrasonic variables measurement;
Conference_Titel :
Ultrasonics Symposium, 1990. Proceedings., IEEE 1990
Conference_Location :
Honolulu, HI
DOI :
10.1109/ULTSYM.1990.171651
