Ultrasonic Phased Arrays with Variable Geometric Focusing for Hyperthermia Applications

Young J. Yoon, Paul J. Benkeser

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

An ultrasonic applicator, which utilizes both electronic and variable geometric focusing, for deep-localized hyperthermia is investigated. The applicator is based around a linear phased array that furnishes its electronic focusing capability. The output of the array radiates through a spherical liquid-lens that provides the applicator a variable geometric focusing capability as well. A lens of this type adds dynamic focusing to the elevation dimension of the linear phased array. By controlling the volume of liquid in the lens (and thus the radius of curvature of its membrane), dynamic control of the geometrical focus can be achieved. Comparisons of computer simulations and experimental measurements of the field intensity distribution of a small-scale prototype applicator are presented. Important design parameters, such as the choice of the liquid for the lens and the size and number of array elements, are examined. The range of applications for this device as well as its potential advantages over current applicator designs will also be discussed.

Original languageEnglish
Pages (from-to)273-278
Number of pages6
JournalIEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control
Volume39
Issue number2
DOIs
Publication statusPublished - 1992 Mar

Fingerprint

Applicators
hyperthermia
phased arrays
ultrasonics
Ultrasonics
lenses
Lenses
linear arrays
liquids
Liquids
dynamic control
electronics
computerized simulation
prototypes
curvature
membranes
radii
output
Membranes
Computer simulation

All Science Journal Classification (ASJC) codes

  • Instrumentation
  • Acoustics and Ultrasonics
  • Electrical and Electronic Engineering

Cite this

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Ultrasonic Phased Arrays with Variable Geometric Focusing for Hyperthermia Applications. / Yoon, Young J.; Benkeser, Paul J.

In: IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, Vol. 39, No. 2, 03.1992, p. 273-278.

Research output: Contribution to journalArticle

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