Method and apparatus for acquiring image data in a nuclear magne

Details Method and apparatus for acquiring image data in a nuclear magne Method and apparatus for acquiring image data in a nuclear magne

1996-03-26

1998-03-10

O'Shea, Sandra L.

Electricity: measuring and testing

Particle precession resonance

Using a nuclear resonance spectrometer system

324307, G01V 314

Patent

active

057265690

ABSTRACT:
In a magnetic resonance imaging apparatus and method the following pulse sequence is repeated N times for acquiring image data. A first radio-frequency pulse is emitted for exciting nuclear spins, in an examination subject. A second radio-frequency pulse is emitted after a time span for rephasing the nuclear spins. Readout of the resulting nuclear magnetic resonance signal under a frequency-coding gradient takes place after a further time span following the second radio-frequency pulse. After waiting another time span, the first radio-frequency pulse of the next sequence is emitted. The pulse sequence is configured such that the nuclear magnetic resonance signals arising from the second radio-frequency pulse of the n-1.sup.th sequence and the first radio-frequency pulse of the following n.sup.th pulse sequence do not superimpose.

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"Suppression of Artefacts Due to Imperfect .pi.-Pulses in Multiple Echo Fourier Imaging," Duijn et al., SMRM 1984 (pp. 197-198).

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