US 11,693,076 B2
Information processing apparatus, information processing method, and non-transitory computer-readable storage medium storing information processing program
Mitsuhiro Bekku, Utsunomiya (JP)
Assigned to CANON MEDICAL SYSTEMS CORPORATION, Otawara (JP)
Filed by CANON MEDICAL SYSTEMS CORPORATION, Otawara (JP)
Filed on Oct. 7, 2021, as Appl. No. 17/450,174.
Claims priority of application No. JP2020-176316 (JP), filed on Oct. 20, 2020.
Prior Publication US 2022/0120835 A1, Apr. 21, 2022
Int. Cl. G01V 3/00 (2006.01); G01R 33/561 (2006.01); G01R 33/54 (2006.01); G01R 33/565 (2006.01)
CPC G01R 33/5611 (2013.01) [G01R 33/543 (2013.01); G01R 33/56545 (2013.01)] 11 Claims
OG exemplary drawing
 
1. An information processing apparatus, comprising:
processing circuitry configured to
obtain a first g map generated using first magnetic resonance data acquired through a first parallel imaging process performed by using a plurality of reception coils and a second g map generated using second magnetic resonance data related to a second parallel imaging process performed by using the plurality of reception coils, the first g map indicating a spatial distribution of first g factors generated for a reception coil, the second g map indicating a spatial distribution of second g factors generated for a reception coil, the first g factors and the second g factors indicating a degree of amplification noise in an unfolding of the first and second parallel imaging processes,
wherein the first parallel imaging process has an imaging protocol to acquire a magnetic resonance signal related to a trajectory corresponding to an auto-calibration signal in a k-space,
the first magnetic resonance data corresponding to each of the plurality of reception coils includes data related to the auto-calibration signal,
the second parallel imaging process has an imaging protocol to acquire a magnetic resonance signal in which aliasing in an image in an image space is unfolded by using a plurality of sensitivity maps corresponding to the plurality of reception coils, and
the second magnetic resonance data corresponding to each of the plurality of reception coils includes data used for generating a corresponding one of the plurality of sensitivity maps;
adjust the plurality of first g factors so as to reduce a difference between the plurality of first g factors in a first region of the first g map and the plurality of second g factors, within a region of the second g map corresponding to the first region, by changing a regularization parameter with which an impact is imposed on the plurality of first g factors by the first magnetic resonance data; and
generate a magnetic resonance image related to the first parallel imaging process, by using the first magnetic resonance data and the adjusted plurality of first g factors.