Magnetic resonance imaging apparatus and method of controlling the same
AssigneeFUJIFILM Corporation
InventorYusuke Hoshino
Life of this patent
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Abstract
The present invention aims to, in a case where measurement data affected by a body movement that occurred during an examination is re-measured, reduce a time extension caused by the re-measurement. Whether or not re-measurement is necessary is determined in consideration of continuity of measurement data affected by a body movement. In addition, in a case of performing the re-measurement, measurement of a part of unmeasured measurement data is omitted in consideration of a measurement time (number of phase encoding steps) of the measurement data to be re-measured.
Claims11
A magnetic resonance imaging apparatus comprising:
- an imaging unit that collects nuclear magnetic resonance signals of a subject;
- an image generation unit that reconstructs an image of the subject using k-space data consisting of the nuclear magnetic resonance signals collected by the imaging unit;
- a body movement processing unit that analyzes a body movement of the subject during imaging and that specifies body movement-affected data that is affected by the body movement of the subject among the k-space data;
- and
- a processor that controls the imaging unit and the image generation unit,
- wherein the processor determines whether to subject the body movement-affected data to body movement correction reconstruction or to re-measure the body movement-affected data according to a position of the body movement-affected data in a k-space and a number of data points being consecutive in a data arrangement direction of the k-space of the body movement-affected data, and, in a case where it is determined to re-measure at least a part of the body movement-affected data, the processor controls a way by which re-measurement is executed by the imaging unit.
A method of controlling a magnetic resonance imaging apparatus, the method comprising:
- a step of specifying body movement-affected data affected by a body movement, which is included in k-space data collected by the magnetic resonance imaging apparatus;
- a step of determining whether or not re-measurement of the body movement-affected data is necessary, based on a position of the body movement-affected data in a k-space;
- a step of, in a case where it is determined that the re-measurement is not necessary, further determining whether or not re-measurement of the body movement-affected data is necessary, based on a number of data points being consecutive in a data arrangement direction of the k-space of the body movement-affected data;
- and
- a step of, in a case where it is determined that re-measurement of at least a part of the body movement-affected data is necessary, setting a condition for the re-measurement.
Dependencies are inferred from the claim text.