Method for reducing fast spin echo motion artifacts by echo sele

Surgery – Diagnostic testing – Detecting nuclear – electromagnetic – or ultrasonic radiation

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324307, 324309, A61B 5055

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active

058657479

ABSTRACT:
After exciting dipoles in an examination region (60), a train of magnetic resonance echoes including echoes (66.sub.1, 66.sub.2, . . . ) is induced, e.g., with a series of refocusing pulses including pulses (68.sub.1, 68.sub.2, . . . ). The echoes are phase and frequency-encoded. A receiver 38 is gated by a gate circuit (82) to sample the even echoes (66.sub.2 -66.sub.10) and the odd echoes (66.sub.5 -66.sub.10) that occur after a threshold odd echo such as the third echo (66.sub.3) so as to generate an image of a common physical region which exhibits reduced motion artifacts.

REFERENCES:
patent: 4728890 (1988-03-01), Pattany et al.
patent: 5431163 (1995-07-01), Kajima
Pradip M. Pattany, et al., Motion Artifact Suppression Technique (MAST) for MR Imaging, Journal of Computer Assisted Tomography, 11(3) :369-377, May/Jun.
R. Scott Hinks, et al., Gradient Moment Nulling in Fast Spin Echo, MRM 32(6) 698-706 (1994).
A.M. Siuciak, et al., Eddy Currents Effects on the Fast Spin Echo Sequence, 1994 SMR Conference, p. 476.
G.L. Nayler, Blood Flow Imaging By Cine Magnetic Resonance, Journal of Computer Assisted Tomography, 10(5):715-722, Sep./Oct.

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