Temperature distribution measurements in two‐dimensional NMR imaging

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Abstract
The effects of regional temperature distribution in 2-dimensional NMR T 1 imaging is studied. Variations in local temperature appear as variations in the corresponding T 1 image. The potential use of NMR T 1 imaging in temperature measurements is evaluated in the case of water and blood samples. Using containers where the temperature could be either known or directly controlled with reasonable accuracy, images are obtained with samples having at least 2 regions at different temperatures. As expected, T 1 is found to vary linearly with 1/T over the range of 0.degree. to about 40.degree. C for blood. The potential use of T 1 imaging in hyperthermia applications is also discussed.

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