Magnetic resonance imaging apparatus and method
First Claim
Patent Images
1. A magnetic resonance imaging apparatus comprising:
- a collector which collects data corresponding to a magnetic resonance signal emitted from a subject placed in a static magnetic field;
a detector which repeatedly detects a position of a particular section of the subject in the static magnetic field;
a reconstruction unit which reconstructs an image based on the data collected when a last one of the detected positions falls within an allowable area;
a calculation unit which repeatedly calculates a value indicating variations in positions each of which is detected by the detector for a last predetermined period; and
a setting unit which sets the allowable area in such a manner as to vary a size of the allowable area in accordance with a last one of values each calculated by the calculation unit.
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Abstract
A magnetic resonance imaging apparatus includes a movement unit which moves a subject placed in a static magnetic field, a collector which collects data corresponding to a magnetic resonance signal emitted from the subject, a detector which detects a position of a particular section of the subject in the static magnetic field, a reconstruction unit which reconstructs an image, based on the collected data, when the detected position falls within an allowable area, and a controller which controls the movement unit to compensate for a deviation of the detected position from a reference position.
59 Citations
6 Claims
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1. A magnetic resonance imaging apparatus comprising:
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a collector which collects data corresponding to a magnetic resonance signal emitted from a subject placed in a static magnetic field; a detector which repeatedly detects a position of a particular section of the subject in the static magnetic field; a reconstruction unit which reconstructs an image based on the data collected when a last one of the detected positions falls within an allowable area; a calculation unit which repeatedly calculates a value indicating variations in positions each of which is detected by the detector for a last predetermined period; and a setting unit which sets the allowable area in such a manner as to vary a size of the allowable area in accordance with a last one of values each calculated by the calculation unit. - View Dependent Claims (2, 3, 4, 5)
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6. A magnetic resonance imaging method comprising:
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collecting data corresponding to a magnetic resonance signal emitted from a subject placed in a static magnetic field; repeatedly detecting a position of a particular section of the subject in the static magnetic field; reconstructing an image based on the data collected when a last one of the detected positions falls within an allowable area; repeatedly calculating a value indicating variations in positions each of which is detected by the detector for a last predetermined period; and setting the allowable area in such a manner as to vary a size of the allowable area in accordance with a last one of values each calculated by the calculation unit.
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Specification