Title :
The pseudoinverse pattern synthesis method: experimental verification using a prototype cylindrical-section ultrasound hyperthermia phased-array applicator
Author :
Ebbini, Emad S. ; Ngo, Francis ; Cain, Charles A.
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., Michigan Univ., Ann Arbor, MI, USA
Abstract :
A prototype 64-element, 75° cylindrical-section ultrasonic phased-array hyperthermia applicator has been designed and constructed. The ability of this applicator to focus ultrasonic energy at its geometric focus was verified in a water medium. The array was then driven by excitation vectors obtained using the pseudoinverse pattern synthesis method to generate shifted-focus and double-focus field patterns. The measured intensity profiles agree well with the theoretically predicted ones
Keywords :
biomedical ultrasonics; biothermics; radiation therapy; US energy focusing; cylindrical-section ultrasound hyperthermia phased-array applicator; double-focus field pattern; excitation vectors; geometric focus; intensity profile; pseudoinverse pattern synthesis method; shifted-focus field pattern; water medium; Applicators; Circuits; Clocks; Frequency conversion; Heating; Hyperthermia; Performance analysis; Phased arrays; Prototypes; Ultrasonic imaging;
Conference_Titel :
Ultrasonics Symposium, 1989. Proceedings., IEEE 1989
Conference_Location :
Montreal, Que.
DOI :
10.1109/ULTSYM.1989.67138
