Analysis of temperature responses to diffused ultrasound focal fields produced by a sector-vortex phased array

S. I. Umemura, C. A. Cain

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)

Abstract

The sector-vortex applicator, a disc-shaped ultrasound phased array with a geometric focus having multiple sectors and tracks, can directly synthesize, without scanning, diffuse focal patterns useful for hyperthermia. Temperature distribution patterns resulting from these acoustic fields have been simulated by solving a steady-state bioheat equation numerically for a wide range of blood perfusion rates. These results suggest that the sector-vortex array will be particularly suitable for heating non-superficial small tumours. The temperature distribution pattern changes due to variations in blood perfusion are interpreted based on spatial frequency domain Fourier analysis of temperature responses to different power deposition patterns. The system behaves like a low-pass spatial frequency filter.

Original languageEnglish
Pages (from-to)641-654
Number of pages14
JournalInternational Journal of Hyperthermia
Volume6
Issue number3
DOIs
Publication statusPublished - 1990

ASJC Scopus subject areas

  • Physiology
  • Physiology (medical)
  • Cancer Research

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