Magnetic resonance imaging apparatus and calibration method thereof
AssigneeFUJIFILM Corporation
InventorsYasuhiro Kamada, Kota Hamada, Hideyuki Horio, Ayaka Ikegawa
Life of this patent
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Abstract
An apparatus and a method can be provided to improve the accuracy of automatic calibration without extension of an examination time in an MR examination. A range of calibration performed before main imaging is determined with reference to a main imaging range and other spatial information. The spatial information consists of information for estimating an MR signal generation range, such as a subject region, a uniform magnetic field region, and a structural restriction of an apparatus, and a calibration range is determined such that a proportion of the MR signal generation range included in the calibration range is as high as possible.
Claims18
A magnetic resonance imaging apparatus comprising:
- an imaging unit that performs main imaging of collecting a nuclear magnetic resonance signal, which is generated from a subject placed in a static magnetic field space, to acquire an image of the subject, and calibration imaging of collecting calibration data required for the main imaging;
- and
- a controller that controls an operation of the imaging unit,
- wherein the controller includes a calibration range setting unit that sets a range of the calibration imaging, and the calibration range setting unit sets a calibration range by using a main imaging range set in advance and spatial information other than the main imaging range, the spatial information used when setting the calibration range including a subject region and a uniform magnetic field region.
A calibration method of collecting, before main imaging of acquiring an image of a subject, calibration data required for the main imaging, the calibration method comprising:
- a step of setting a calibration range,
- in the step of setting the calibration range, the calibration range being set by combining a main imaging range set in advance and spatial information other than the main imaging range, the spatial information used when setting the calibration range including a subject region and a uniform magnetic field region.
A magnetic resonance imaging apparatus comprising:
- an imaging unit that performs main imaging of collecting a nuclear magnetic resonance signal, which is generated from a subject placed in a static magnetic field space, to acquire an image of the subject, and calibration imaging of collecting calibration data required for the main imaging;
- and
- a controller that controls an operation of the imaging unit,
- wherein the controller includes a calibration range setting unit that sets a range of the calibration imaging, and the calibration range setting unit sets a calibration range by using a main imaging range set in advance and spatial information other than the main imaging range, the spatial information used when setting the calibration range including a subject region and a uniform magnetic field region, and
- wherein the calibration range setting unit uses the spatial information and information regarding the uniform magnetic field region to exclude the uniform magnetic field region when determining the calibration range.
Dependencies are inferred from the claim text.