IMAGING PROCESS AND NUCLEAR SPIN TOMOGRAPH FOR SENSING LONGITUDINAL SPIN-LATTICE RELAXATION TIME

An MR image imaging procedure for the acquisition of the longitudinal spin-lattice relaxation time has a data-acquisition module with a slice-selective alpha-high-frequency impulse as well as magnetic gradients (Gx, Gy, Gz) for slice selection and/or for encoding of a k-space. The acquired data desc...

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Bibliographic Details
Main Author SHAH, N., JONI
Format Patent
LanguageEnglish
French
German
Published 01.04.2009
Subjects
MEASURING
MEASURING ELECTRIC VARIABLES
MEASURING MAGNETIC VARIABLES
PHYSICS
TESTING
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Summary:An MR image imaging procedure for the acquisition of the longitudinal spin-lattice relaxation time has a data-acquisition module with a slice-selective alpha-high-frequency impulse as well as magnetic gradients (Gx, Gy, Gz) for slice selection and/or for encoding of a k-space. The acquired data describes a time point of a spin-lattice relaxation and the data-acquisition module for acquiring data of a further time point being repeated. A 180° high-frequency impulse or a 180° high-frequency impulse and a 90° high-frequency impulse preceding the 180° high-frequency impulse generating a spin-lattice relaxation precede the data-acquisition module. The magnetic gradients Gx and Gy for k-space encoding are simultaneously applied subsequent to the slice-selective alpha-high-frequency impulse. A temporal course of the magnetic gradients Gx and Gy is sinusoidal so that the result is a spiral coverage of the k-space and data are acquired during k-space encoding.
Bibliography:Application Number: EP20050716457