MRI method and device for fast determination of the transverse r

Details MRI method and device for fast determination of the transverse r MRI method and device for fast determination of the transverse r

1989-05-26

1991-11-26

Myracle, Jerry W.

Electricity: measuring and testing

Particle precession resonance

Using a nuclear resonance spectrometer system

G01R 3354

Patent

active

050686100

ABSTRACT:
An MRI method and device for fast determination of the transverse relaxation time constant T2 utilizes the fact that this time constant introduces asymmetry into all magnetic resonance echo signals (::exp(-t/T2) enabling determination of the time constant T2 from the asymmetry of the echo signals. During the determination of a spin density distribution the value of the time constant T2 can be determined for each pixel. After Fourier transformation of the resonance signal, integration of the imaginary terms is performed (in the coordinate direction of the measuring gradient). The quotient of the current integral and the real term of the associated pixel is an accurate measure of the time constant T2 in the relevant pixel.

REFERENCES:
patent: 4720679 (1988-01-01), Patrick et al.
patent: 4866386 (1989-09-01), Sattin
H. Bruder et al, "A New Steady-State Imaging Sequence for Simultaneous Acquisition of Two MR Image with Clearly Different Contrasts", Magnetic Resonance in Medicine, vol. 7, (1988), pp. 35-42.

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