Title:
MAGNETIC RESONANCE IMAGING DEVICE
Document Type and Number:
WIPO Patent Application WO/2014/185429
Kind Code:
A1
Abstract:
A magnetic resonance imaging device (1) comprising: at least a pair of superconducting main coils (21) which are disposed in a manner so as to have the same central axis (2) as one another, and to be in plane symmetry in relation to the equatorial plane (4) that is orthogonal to the central axis (2); at least a pair of shield coils (22) which are disposed coaxially with the superconducting main coils (21), at the outer sides of the superconducting main coils (21), at the opposite side thereof to the equatorial plane (4), and in plane symmetry in relation to the equatorial plane (4), and generate magnetic fields of the reverse direction to the superconducting main coils (21); a pair of annular first magnetic bodies (31) which are disposed at the inner sides of the superconducting main coils (21) in the radial direction, and in plane symmetry in relation to the equatorial plane (4); and a second magnetic body (32) which is a protrusion provided to the outer peripheral side of an end surface (311) at the opposite side of the first magnetic bodies (31) to the equatorial plane (4). Thus, the uniform magnetic field performance of an image capture space is improved without reducing the degree of opening, and without causing the cost of the device to increase due to an increase in superconducting wires.
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Inventors:
SHIBATA KEIICHIRO (JP)
ABE MITSUSHI (JP)
ABE MITSUSHI (JP)
Application Number:
PCT/JP2014/062751
Publication Date:
November 20, 2014
Filing Date:
May 13, 2014
Export Citation:
Assignee:
HITACHI MEDICAL CORP (JP)
International Classes:
A61B5/055; G01R33/387; H01F7/20
Foreign References:
| JP2006102060A | 2006-04-20 | |||
| JP2001224571A | 2001-08-21 |
Attorney, Agent or Firm:
ISONO Michizo (JP)
Michizo Isono (JP)
Michizo Isono (JP)
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