New techniques for the thermal physiologist: using clinical magnetic resonance methods in basic research

Werner, J.; Mietzsch, E.

doi:10.1016/s0306-4565(01)00028-6

Cited by 4 publications

(2 citation statements)

References 21 publications

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“…MR thermometry is already used for temperature follow‐up in hyperthermia cancer treatments (15) as a noninvasive method. This method is based on the thermal sensitivity of MR parameters such as the water proton resonance frequency shift, the water diffusion coefficient (D) or the T 1 relaxation time (16–18).…”

Section: Introductionmentioning

confidence: 99%

“…For in vivo MR‐based thermometry, this method offers the advantage of better measurement accuracy at high fields, but the main drawback is its increased sensitivity to physiological motion, and the method is inappropriate in presence of lipid tissues (21). The diffusion coefficient thermometry method relies on a linear relation between the diffusion coefficient and temperature as given by the Stokes Einstein equation (18, 22). When temperature increases, the Brownian motion also increases, resulting in a diffusion coefficient variation of about 2.5%/°C.…”

Section: Introductionmentioning

confidence: 99%

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Assessment of radiofrequency self‐heating around a metallic wire with MR T1‐based thermometry

Detti¹,

Grenier²,

Perrin³

et al. 2011

Magnetic Resonance in Med

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Heat produced by a magnetic resonance (MR) imaging sequence in the vicinity of a conductive wire (pacemaker, electrodes, or catheter), is a subject of interest for the assessment of patient safety during imaging. For this purpose, the measurement of temperature rises during an MR imaging sequence using MR T 1 -based thermometry provides several advantages, mainly in its ability to retrieve in situ realtime thermal maps. Recent studies investigated the heat produced by an independent radiofrequency pulse, assessing MR imaging sequence heating using a specific MR thermometry sequence. This study focuses on self-heating for which the radiofrequency pulses used for measuring temperature create the heat. An experimental design was set up to evaluate T 1 -based thermometry self-heating using a coupled/decoupled wire and to compare it with a reference temperature gathered by an optical fiber device. For the tested experimental set up, T 1 -based thermometry is in fairly good agreement with optical fiber reference temperature. Magn Reson Med 66:448-455,

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Section: Introductionmentioning

confidence: 99%