Asymmetric focussed arrays for ultrasonic tumor therapy

Author

Lizzi, F.L. ; Astor, M. ; Deng, C. ; Rosado, A. ; Coleman, D.J. ; Silverman, R.

Author_Institution

Riverside Res. Inst., New York, NY, USA

Volume

2

fYear

1996

fDate

3-6 Nov 1996

Firstpage

1281

Abstract

This study investigated transducer array configurations to produce thermal necrosis lesions for ultrasonic treatment of ocular tumors. Spherical-cap transducers with segmented strip electrodes were designed to produce asymmetric focal-plane beam patterns that may expedite the production of lesion matrices. Phased electrode excitation was evaluated as a means of reducing focal-point intensities to suppress undesired gas-body formation. Experimental beam patterns agreed well with theoretical results and initial in-vitro experiments demonstrated desired lesion features

Keywords

biomedical equipment; biomedical ultrasonics; eye; radiation therapy; ultrasonic transducer arrays; asymmetric focal-plane beam patterns; asymmetric focussed arrays; desired lesion features; experimental beam patterns; eye cancer; focal-point intensities reduction; in-vitro experiments; lesion matrices production; medical instrumentation; ocular tumors; phased electrode excitation; segmented strip electrodes; thermal necrosis lesions; transducer array configurations; ultrasonic treatment; ultrasonic tumor therapy; undesired gas-body formation suppression; Biomedical electrodes; Biomedical transducers; Hyperthermia; Lesions; Medical treatment; Neoplasms; Temperature; Ultrasonic imaging; Ultrasonic transducer arrays; Ultrasonic transducers;

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.1996.584230

Filename

584230