公开(公告)号：US20250164588A1

公开(公告)日：2025-05-22

申请号：US18955956

申请日：2024-11-21

Applicant: CANON MEDICAL SYSTEMS CORPORATION

Inventor： Katsutoshi MIZUNO ,  Takehiro SHIBUYA ,  Yoshitomo SAKAKURA ,  Kentaro KIKUCHI

IPC: G01R33/34 ,  H01F6/06

Abstract: A superconducting magnet according to an exemplary embodiment is a superconducting magnet used in a magnetic resonance imaging apparatus, and includes a superconducting coil and a cylindrical radiation shield. The superconducting coil is made of a wound superconducting wire material. The radiation shield includes an outer cylinder and an inner cylinder that cover the superconducting coil. The outer cylinder of the radiation shield is made of a metal, and at least a part of the inner cylinder of the radiation shield is made of an insulator or a high-resistance material.

公开(公告)号：US20250060436A1

公开(公告)日：2025-02-20

申请号：US18797686

申请日：2024-08-08

Applicant: CANON MEDICAL SYSTEMS CORPORATION

Inventor： Katsutoshi MIZUNO ,  Takehiro SHIBUYA

IPC: G01R33/3815 ,  G01R33/38

Abstract: A superconducting magnet device of an embodiment includes a vacuum vessel, a superconducting coil, and an insulating load support. The insulating load support supports the superconducting coil through the thermal deformation cancellation 5 mechanism that generates a second deformation amount in a direction in which a first deformation amount applied from the superconducting coil to the insulating load support is canceled out due to thermal deformation occurring in the superconducting coil when the inside of the vacuum vessel is cooled to an extremely low temperature. The thermal deformation cancellation mechanism includes a thermal deformation member. The 10 thermal deformation member includes at least a material having a second coefficient of thermal expansion determined based on a first coefficient of thermal expansion of a material forming the superconducting coil, and generates the second deformation amount by thermally deforming in the same environment as the superconducting coil.

公开(公告)号：US20240161953A1

公开(公告)日：2024-05-16

申请号：US18484591

申请日：2023-10-11

Applicant: CANON MEDICAL SYSTEMS CORPORATION

Inventor： Katsutoshi MIZUNO ,  Takehiro SHIBUYA

IPC: H01F6/06

CPC classification number: H01F6/06

Abstract: A superconducting coil device of an embodiment includes stacked pancake coils. Each of the stacked pancake coils includes an inner frame, a separator disposed outside the inner frame, and a superconducting wire wound part formed on the separator. The superconducting coil device further includes a position adjustment part configured to adjust relative positions of the stacked pancake coils.