Nuclear magnetic resonance method and apparatus for reducing motion artifacts
AssigneePicker International, Inc.
InventorDavid R. Bailes
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Abstract
A method, and an apparatus for performing the method, are described, for imaging a region of a body using NMR in which part of the region is moving with a motion such that its displacement with respect to time is a nonmonotonic function during the time period over which NMR data signals are collected. The data signals are collected in an order dependent on the motion such that motion artifacts are reduced.
Claims10
A nuclear magnetic resonance method for imaging a region of a body in which part of the region is moving with a motion such that its displacement with respect to time is a nonmonotonic function during a time period over which a plurality of NMR data signals, which together define an image are collected comprising the step of collecting the data signals in an order dependent on the motion such that motion artifacts are reduced.
A nuclear magnetic resonance apparatus for imaging a region of a body in which part of the region is moving with a motion such that its displacement with respect to time is a nonmonotonic function during a time period over which a plurality of NMR data signals, which together define an image, are collected, the apparatus comprising:
- excitation means arranged to excite nuclear magnetic spins preferentially in said region;
- encoding means arranged to encode said magnetic spins;
- data collection means arranged to collect data signals representative of encoded magnetic spins;
- display means responsive to a plurality of collected data signals to display an image of said region;
- measuring means arranged to produce an output indicative of the displacement of said moving part of said region;
- and control means for controlling the encoding means during said time period in dependence on the output of said measuring means so that data signals collected during said time period are collected in an order dependent on said motion such that motion artifacts are reduced.
Dependencies are inferred from the claim text.