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A model of the temperature rise in the head due to magnetic resonance imaging procedures

โœ Scribed by T. Whit Athey

Publisher
John Wiley and Sons
Year
1989
Tongue
English
Weight
417 KB
Volume
9
Category
Article
ISSN
0740-3194

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โœฆ Synopsis

A simple model of power deposition in the head is presented in which the temperature increase in the head in general and, in particular, in a small spherical region of unperfused tissue contained within the head is calculated. The result of the calculation provides a limit on the SAR needed to ensure that a 1ยฐC temperature rise is not exceeded for unperfused spheres of different sizes, imaging sessions ofdifferent lengths of time, and different blood flow rates to the head. The model assumes that the rest of the body during a head imaging session can act as a perfect heat sink at 37ยฐC. The model suggests that current practices in MRI imaging will not cause a temperature rise in the center of small unperfused regions such as the eye of more than 1ยฐC.

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