Surgery – Diagnostic testing – Detecting nuclear – electromagnetic – or ultrasonic radiation
Patent
1997-04-22
1999-02-02
Lateef, Marvin M.
Surgery
Diagnostic testing
Detecting nuclear, electromagnetic, or ultrasonic radiation
324307, 324309, A61B 5055
Patent
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.
Lateef Marvin M.
Mantis Mercader Eleni
Picker International Inc.
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