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US 5,957,843 AGranted
Partial flyback echo-planar imaging
AssigneeThe Board of Trustees of the Leland Stanford Junior University
InventorsGerard T. Luk Pat, Craig H. Meyer, John M. Pauly, Dwight G. Nishimura
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Abstract
Flyback imaging is combined with echo planar imaging (EPI) for improved readout flow properties. For increases in imaging time of 50% or less, significant improvements in imaging are realized. The partial flyback improves partial-Fourier EPI and inside-out EPI and can be applied to any EPI trajectory.
Claims8
A method of echo planar magnetic resonance imaging with reduced flow artifacts when material flows in an imaged plane comprising the steps of:
- a) selectively exciting nuclei spins in an object to be imaged,
- b) applying read-out gradients to said object to scan k-space with the scanning parallel to one axis near the origin of k-space being in one direction and elsewhere in k-space scanning parallel to said axis being bidirectional, and
- c) detecting signals from said nuclei during read-out.
Apparatus for imaging nuclei in a plane of an object in which material flows comprising:
- a) means for establishing a static magnetic field through said object,
- b) means for selectively exciting nuclei spins in said object,
- c) means for applying read-out gradients to said object to scan k-space with the scanning parallel to one axis near the origin of k-space being in one direction and elsewhere in k-space scanning being bidirectional, and
- d) means for detecting signals from said nuclei during read-out.
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