Electricity: measuring and testing – Particle precession resonance – Using a nuclear resonance spectrometer system
Patent
1993-03-11
1995-01-03
Arana, Louis
Electricity: measuring and testing
Particle precession resonance
Using a nuclear resonance spectrometer system
1286532, G01V 300
Patent
active
053789873
ABSTRACT:
A non-invasive measurement of a temperature distribution within a target body using a nuclear magnetic resonance imaging, capable of realizing a high speed and a high precision measurement, and accounting for a displacement of the target body during the measurement. The chemical shift data from the target body at each voxel in an imaging target region on the target body are collected with and without a temperature change of the target body, a difference between the chemical shift data collected with the temperature change and the chemical shift data collected without the temperature change at each voxel, and a temperature distribution image is constructed and displayed according to the difference calculated. The chemical shift data are preferably collected by using a phase mapping imaging sequence.
REFERENCES:
patent: 4558279 (1985-12-01), Ackerman et al.
patent: 5207222 (1993-05-01), Koizumi et al.
Hindman, "Proton Resonance Shift of Water in the Gas and Liquid States", The Journal of Chemical Physics, 44: pp. 4582-4592, (1966).
Vidrine et al, "Feedback Excitation Nuclear Magnetic Resonance Spectrometry and its Application to Simultaneous Temperature Measurement", Analytical Chemistry, vol. 50:293-303, (1978).
Hall et al., "Mapping of pH and Temperature Distribution Using Chemical-Shift-Resolved Tomography", Journal of Magnetic Resonance, vol. 65:501-505, (1985).
Lebihan et al, "Non-Invasive Temperature Mapping During Hyperthermia by MR Imaging of Molecular Diffusion", Magnetic Resonance Imaging II, pp.342-343.
Ishihara Yasutoshi
Sato Kozo
Arana Louis
Kabushiki Kaisha Toshiba
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