Spherical phased array design optimized for ultrasound surgery

Author

Daum, D.R. ; Hynynen, K.

Author_Institution

Brigham & Women´´s Hosp., Boston, MA, USA

Volume

2

fYear

1997

fDate

5-8 Oct 1997

Firstpage

1315

Abstract

A simple model is presented to illustrate the focal limitations of a spherically sectioned array designed for the treatment of deep seated liver tumors. The design is optimized using the acoustic dose as a function of the focal depth and available acoustic aperture. A quantitative measure of the possible region of focal necrosis is presented as a function of array parameters with the limiting criteria being near field heating. The maximum distance to produce continuous necrosis between foci in a multiple focus pattern and in a temporally multiplexed pattern is approximately 50% larger than the distance needed between sequential foci

Keywords

biomedical equipment; biomedical ultrasonics; liver; radiation therapy; surgery; tumours; ultrasonic arrays; acoustic aperture; acoustic dose; array parameters; continuous necrosis between foci; deep seated liver tumors treatment; focal depth; limiting criteria; medical instrumentation; model; multiple focus pattern; near field heating; optimized spherical phased array design; sequential foci; spherically sectioned array; temporally multiplexed pattern; therapeutic ultrasound; ultrasound surgery; Apertures; Applicators; Cancer; Design optimization; Liver neoplasms; Medical treatment; Phased arrays; Surgery; Ultrasonic imaging; Ultrasonic transducer arrays;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium, 1997. Proceedings., 1997 IEEE

Conference_Location

Toronto, Ont.

ISSN

1051-0117

Print_ISBN

0-7803-4153-8

Type

conf

DOI

10.1109/ULTSYM.1997.661818

Filename

661818