Acquisition of 3D temperature distributions in fluid flow using proton resonance frequency thermometry.

Buchenberg, Waltraud B; Wassermann, Florian; Grundmann, Sven; Jung, Bernd; Simpson, Robin (2016). Acquisition of 3D temperature distributions in fluid flow using proton resonance frequency thermometry. Magnetic resonance in medicine, 76(1), pp. 145-155. Wiley 10.1002/mrm.25874

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PURPOSE Proton resonance frequency thermometry is well established for monitoring small temperature changes in tissue. Application of the technique to the measurement of complex temperature distributions within fluid flow is of great interest to the engineering community and could also have medical applications. This work presents an experimental approach to reliably measure three-dimensional (3D) temperature fields in fluid flow using proton resonance frequency thermometry. METHODS A velocity-compensated three-dimensional gradient echo sequence was used. A flexible pumping system was attached to an MR compatible double pipe heat exchanger. The temperature of two separate flow circuits could be adjusted to produce various three-dimensional spatial temperature distributions within the fluid flow. Validation was performed using MR compatible temperature probes in a uniformly heated flow. A comparative study was conducted with thermocouples in the presence of a spatially varying temperature distribution. RESULTS In uniformly heated flow, temperature changes were accurately measured to within 0.5 K using proton resonance frequency thermometry, while spatially varying temperature changes measured with MR showed good qualitative agreement with pointwise measurements using thermocouples. CONCLUSION Proton resonance frequency thermometry can be used in a variety of complex flow situations to address medical as well as engineering questions. This work makes it possible to gain new insights into fundamental heat transfer phenomena. Magn Reson Med 76:145-155, 2016. © 2015 Wiley Periodicals, Inc.

Item Type:

Journal Article (Original Article)

Division/Institute:

04 Faculty of Medicine > Department of Radiology, Neuroradiology and Nuclear Medicine (DRNN) > Institute of Diagnostic, Interventional and Paediatric Radiology

UniBE Contributor:

Jung, Bernd

Subjects:

600 Technology > 610 Medicine & health

ISSN:

0740-3194

Publisher:

Wiley

Language:

English

Submitter:

Karin Hofmann

Date Deposited:

19 Apr 2017 15:16

Last Modified:

19 Apr 2017 15:16

Publisher DOI:

10.1002/mrm.25874

PubMed ID:

26302238

Uncontrolled Keywords:

double pipe heat exchanger; fluid flow; in vitro models; laminar mixed convection flow; magnetic resonance thermometry; proton resonance frequency (PRF); three-dimensional (3D) temperature measurements

BORIS DOI:

10.7892/boris.94108

URI:

https://boris.unibe.ch/id/eprint/94108

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