US 11,918,337 B2
Magnetic resonance imaging apparatus, noise reduction method and image processing apparatus
Toru Shirai, Chiba (JP); Suguru Yokosawa, Chiba (JP); Yukio Kaneko, Chiba (JP); Atsuro Suzuki, Chiba (JP); and Tomoki Amemiya, Chiba (JP)
Assigned to FUJIFILM Healthcare Corporation, Chiba (JP)
Filed by FUJIFILM Healthcare Corporation, Kashiwa (JP)
Filed on Jun. 6, 2022, as Appl. No. 17/832,772.
Claims priority of application No. 2021-099577 (JP), filed on Jun. 15, 2021.
Prior Publication US 2022/0395188 A1, Dec. 15, 2022
Int. Cl. A61B 5/055 (2006.01); G01R 33/3415 (2006.01); G01R 33/56 (2006.01); G01R 33/561 (2006.01); G06T 7/00 (2017.01)
CPC A61B 5/055 (2013.01) [G01R 33/3415 (2013.01); G01R 33/5608 (2013.01); G01R 33/5611 (2013.01); G06T 7/0012 (2013.01); G06T 2207/10088 (2013.01)] 18 Claims
OG exemplary drawing
 
1. A magnetic resonance imaging apparatus comprising:
a measurement unit configured to receive a nuclear magnetic resonance signal generated in a subject by a receiving coil;
an image reconstruction unit configured to process the nuclear magnetic resonance signal received by the receiving coil and reconstruct an image of the subject;
an SNR spatial distribution calculation unit configured to calculate spatial distribution of noise of the image, calculate spatial distribution of the signal of the image, and calculate spatial distribution of a signal-to-noise ratio of the image using the spatial distribution of noise and the spatial distribution of the signal of the image;
a noise reduction unit configured to perform noise reduction to reduce noise from the image based on the spatial distribution of the signal-to-noise ratio; and
a noise processing unit configured to cause a reduced-noise image to be output, based on the noise reduction by the noise reduction unit.