Volume 34, Issue 6 pp. 814-823
Article
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A precise and fast temperature mapping using water proton chemical shift

Yasutoshi Ishihara

Corresponding Author

Yasutoshi Ishihara

Toshiba R & D Center, Kawasaki, 210 Japan

Yasutoshi Ishihara, Toshiba R & D Center, 1, Komukai Toshiba-cho, Saiwai-ku, Kawasaki, 210 Japan===Search for more papers by this author
Arturo Calderon

Arturo Calderon

Toshiba R & D Center, Kawasaki, 210 Japan

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Hidehiro Watanabe

Hidehiro Watanabe

Toshiba R & D Center, Kawasaki, 210 Japan

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Kazuya Okamoto

Kazuya Okamoto

Toshiba R & D Center, Kawasaki, 210 Japan

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Yoshinori Suzuki

Yoshinori Suzuki

Toshiba R & D Center, Kawasaki, 210 Japan

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Kagayaki Kuroda

Kagayaki Kuroda

Faculty of Engineering, Osaka City University, Osaka, 558 Japan

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Yutaka Suzuki

Yutaka Suzuki

Faculty of Engineering, Osaka City University, Osaka, 558 Japan

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First published: December 1995
Citations: 869

Abstract

A new temperature measurement procedure using phase mapping was developed that makes use of the temperature dependence of the water proton chemical shift. Highly accurate and fast measurements were obtained during phantom and in vivo experiments. In the pure water phantom experiments, an accuracy of more than ± 0.5°C was obtained within a few seconds/slice using a field echo pulse sequence (TR/TE = 115/13 ms, matrix = 128 × 128, number of slices = 5). The temperature dependence of the water proton chemical shift was found to be almost the same for different materials with a chemical composition similar to living tissues (water, glucide, protein). Using this method, the temperature change inside a cat's brain was obtained with an accuracy of more than ± 1°C and an in-plane resolution of 0.6 x 0.6 mm. The temperature measurement error was affected by several factors in the living system (B0 shifts caused by position shifts of the sample, blood flow, etc.), the position shift effect being the most serious.

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