Acoustical evaluation of a prototype sector-vortex phased-array applicator

Author

Umemura, Shin-ichiro ; Cain, Charles A.

Author_Institution

Bioacoust. Res. Lab., Illinois Univ., Urbana, IL, USA

Volume

39

Issue

1

fYear

1992

Firstpage

32

Lastpage

38

Abstract

A prototype sector-vortex phased-array applicator for ultrasound hyperthermia was constructed and acoustically evaluated. The array transducer consists of special lead-titanate ceramic elements of 16 sectors and two tracks attached on a element is driven by a complementary pair of power MOSFETs at 750 kHz. An annular focal field approximated by the Mth order Bessel function is theoretically predicted to be formed when the array elements are driven with a phase distribution that rotates M (>

Keywords

acoustic field; acoustic intensity; biomedical ultrasonics; biothermics; radiation therapy; ultrasonic transducers; 750 kHz; Bessel function; PbTiO/sub 3/ ceramic elements; acoustic field measurement; acoustical evaluation; annular focal field; array transducer; drive modes; focal acoustic power; multichannel membrane hydrophone; multidimensional field patterns; power MOSFETs; sector-vortex phased-array applicator; ultrasound hyperthermia; Acoustic measurements; Acoustic transducers; Applicators; Ceramics; Hyperthermia; Lead; Phased arrays; Prototypes; Ultrasonic imaging; Ultrasonic transducers;

fLanguage

English

Journal_Title

Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on

Publisher

ieee

ISSN

0885-3010

Type

jour

DOI

10.1109/58.166807

Filename

166807