U.S. Philips Corporation

Jurgen S Wieland

Dietmar W Kunz

Karl Georg Bomsdorf

A method of reproducing the lactate distribution in a slice comprises first and second sequences, each comprising generating at least three rf pulses. The first sequence is such that the resultant stimulated echo signal remains uninfluenced by the lactate components, the second sequence is such that the stimulated echo signal is determined by the lactate component. A group of difference signals is formed by subtracting the two stimulated echo signals and repeating of these sequences with encoding gradients which vary as regards strength and/or direction, the group is suitable for determining the desired distribution by two-dimensional Fourier transformation.

Magnetic resonance spectroscopie imaging method

A method of a device for determining the spectral distribution of a nuclear magnetization in a limited volume, wherein each sequence of r.f. and gradient excitation comprises a sub-sequence which dephases the nuclear magnetization everywhere outside a defined layer. This sub-sequence is followed by three r.f. pulses, the first two of which are layer-selective. These three r.f. pulses excite the nuclear magnetization in an area of intersection between said layer and two layers which extend perpendicularly to one another and to said layer. In order to suppress undesirable FID signals and to enhance the spectrum, phase cycling is performed.

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Pinneberg, Germany

Jurgen S Wieland