US 12,481,013 B2
Image processing apparatus for correcting distortions of magnetic resonance images
Shohei Hamanaga, Nasushiobara (JP)
Assigned to CANON MEDICAL SYSTEMS CORPORATION, Otawara (JP)
Filed by CANON MEDICAL SYSTEMS CORPORATION, Otawara (JP)
Filed on Dec. 20, 2022, as Appl. No. 18/068,684.
Claims priority of application No. 2022-003906 (JP), filed on Jan. 13, 2022.
Prior Publication US 2023/0221393 A1, Jul. 13, 2023
Int. Cl. G01R 33/565 (2006.01); G01R 33/24 (2006.01)
CPC G01R 33/56563 (2013.01) [G01R 33/243 (2013.01)] 14 Claims
OG exemplary drawing
 
1. An image processing apparatus, comprising:
processing circuitry configured to:
obtain two magnetic resonance images corresponding to two phase encoding directions opposite to each other;
generate a shift map related to shifting a plurality of pixels in the two magnetic resonance images, by optimizing a cost function using a first difference between the two magnetic resonance images and a second difference between two edge images generated based on the two magnetic resonance images;
generate a correction image obtained by correcting distortions of the two magnetic resonance images based on the two magnetic resonance images and the shift map; and
display the generated correction image.