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Developing a multichannel temperature probe for interventional MRI
Author(s) -
Shankaranarayanan Ajit,
Duerk Jeffrey L.,
Lewin Jonathan S.
Publication year - 1998
Publication title -
journal of magnetic resonance imaging
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.563
H-Index - 160
eISSN - 1522-2586
pISSN - 1053-1807
DOI - 10.1002/jmri.1880080133
Subject(s) - radiology , medical physics , interventional radiology , medicine , computer science , nuclear magnetic resonance , physics
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.