公开(公告)号：US20210003651A1

公开(公告)日：2021-01-07

申请号：US16912034

申请日：2020-06-25

Applicant: Canon Medical Systems Corporation

Inventor： Yuuzo KAMIGUCHI

IPC: G01R33/56 ,  G01R33/561 ,  G01R33/48 ,  G06N20/00

Abstract: According to one embodiment, a medical data processing apparatus includes processing circuitry. The processing circuitry acquires first data pieces obtained by sparse sampling. The processing circuitry generates first compressed data pieces lower in number than the first data pieces by multiplying the first data pieces by each of sets of weight coefficients and adding each of the multiplied first data pieces. The processing circuitry performs first processing of outputting second compressed data pieces by applying a trained model to the first compressed data pieces, the trained model being trained by receiving first compressed data pieces based on sparse sampling and outputting at least one of second compressed data pieces based on full sampling.

公开(公告)号：US20250060439A1

公开(公告)日：2025-02-20

申请号：US18800203

申请日：2024-08-12

Applicant: CANON MEDICAL SYSTEMS CORPORATION

Inventor： Takehiro SHIBUYA ,  Sadanori TOMIHA ,  Yoshitomo SAKAKURA ,  Hiromi KAWAMOTO ,  Yuuzo KAMIGUCHI ,  Michiru KAJIWARA

IPC: G01R33/421 ,  A61B5/055 ,  G01R33/34 ,  G01R33/3875

Abstract: An MRI system includes a static magnetic field magnet configured to determine an MR frequency for imaging and generate a first static magnetic field be applied to an object during imaging; a pre-polarizing magnet configured to polarize nuclear spin of the object prior to imaging of the object and generate a second static magnetic field, application of which is stopped during imaging of the object; at least one first shield configured to block a leakage magnetic field of the first static magnetic field, the first shield being provided in a region opposite to an imaging region of the object with respect to the static magnetic field magnet; and at least one second shield configured to block a leakage magnetic field of the second static magnetic field, the second shield being provided in a region opposite to the imaging region with respect to the pre-polarizing magnet.

公开(公告)号：US20230160982A1

公开(公告)日：2023-05-25

申请号：US18056281

申请日：2022-11-17

Applicant: Canon Medical Systems Corporation

Inventor： Yuuzo KAMIGUCHI

IPC: G01R33/20 ,  A61B5/055

CPC classification number: G01R33/20 ,  A61B5/055 ,  G01R33/56341

Abstract: According to one embodiment, a medical data processing apparatus includes processing circuitry. The processing circuitry acquires imaging data acquired by executing spoiled gradient echo imaging and coherent gradient echo imaging by using multiple flip angles. The processing circuitry generates a low-rank approximate image set, which is a set of low-rank approximated images from the imaging data. The processing circuitry reconstructs one or more parameter maps using the above low-rank approximate image set and a related to water exchange in a biological tissue, the multi-pool model including plural free waters and bound water that performs magnetization exchange with those free waters.