Retrospective triggered mri of active or passive joint motion
First Claim
1. A system for generating cine images of a continuously moving bodily structure, the apparatus comprising:
- a magnetic resonance imager (10) which generates magnetic resonance image data of a bodily structure of a subject in an examination region (12) as the subject bodily structure moves continuously through a continuous series of motion states;
a means (38, 40, 72) for providing indications of current motion states through which the bodily structure is moving; and
, a distributing means (42) for distributing the magnetic resonance data in accordance with the detected current motion states.
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Abstract
A subject is placed on a patient support (16) with a bodily structure, such as a joint, within an imaging region (12) of a magnetic resonance imager (10). The bodily structure is moved continuously back and forth through a series of motion states, either manually or under power (70, 72). Encoded magnetic resonance data is distributed (42) into motion state windows. Data with phase encodings near the center of k-space are distributed accurately into the corresponding motion state window; whereas, data phase encoded near the edge of k-space is distributed with less accuracy and may be duplicated and shared among several motion state windows. Data from each motion state window are reconstructed (50) and displayed (56) in a cine mode representing continuous motion.
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Citations
21 Claims
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1. A system for generating cine images of a continuously moving bodily structure, the apparatus comprising:
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a magnetic resonance imager (10) which generates magnetic resonance image data of a bodily structure of a subject in an examination region (12) as the subject bodily structure moves continuously through a continuous series of motion states;
a means (38, 40, 72) for providing indications of current motion states through which the bodily structure is moving; and
,a distributing means (42) for distributing the magnetic resonance data in accordance with the detected current motion states. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A method for generating cine images of a continuously moving bodily structure, the method comprising:
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continuously moving the bodily structure back and forth through a series of motion states;
generating magnetic resonance image data of the bodily structure as it moves continuously through the motion states;
detecting current motion states through which the bodily structure is moving; and
,distributing the magnetic resonance data in accordance with the detected current motion states. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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21. A computer program for programming a magnetic resonance imager (10) to generate cine images of a bodily structure which is continuously moving back and forth through a series of motion states by performing the steps of:
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generating magnetic resonance image data of the bodily structure as it moves continuously through the motion states;
detecting current motion states through which the bodily structure is moving; and
,distributing the magnetic resonance data in accordance with the detected current motion states.
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Specification