Developing a multichannel temperature probe for interventional MRI

Ajit Shankaranarayanan, Jeffrey L. Duerk, Jonathan S. Lewin

Research output: Contribution to journalArticle

Abstract

Interventional MRI (I-MRI) guided thermal tissue ablation has been used for a variety of interventional cancer therapies. These would be further facilitated by temperature-sensitive sequences on low magnetic field MR images. However, until these sequences have been reliably implemented at low fields, other methods of temperature measurement are required. This project describes the development of a low cost, reliable, MRI-compatible temperature sensor array useful at a temperature range from 37°C to higher than 90°C. The device uses a three-channel thermocouple sensor array connected to a variety of filtering and signal-conditioning electronics, analog-to-digital (A/D) converters, and personal computers. The sensors induce negligible field distortion. Similarly, no MRI-based measurement artifacts are observed. One- dimensional temperature profiles are generated with thermocouple signal linearization performed by the software.

Original languageEnglish (US)
Pages (from-to)197-202
Number of pages6
JournalJournal of Magnetic Resonance Imaging
Volume8
Issue number1
DOIs
StatePublished - Jan 1 1998

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Keywords

  • Interventional MRI (I-MRI)
  • Magnetic field compatibility
  • Susceptibility
  • Temperature sensing
  • Thermocouple

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

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