Title:
MRI SYSTEM EMPLOYING SUPERCONDUCTING MAGNET AND ITS MAINTENANCE METHOD
Document Type and Number:
WIPO Patent Application WO/2007/060950
Kind Code:
A1
Abstract:
An MRI system in which a static magnetic field can be generated stably by sustaining the
cooling capacity of a cryocooler within an appropriate range. A magnetic resonance
imaging system employing a superconducting magnet (101) comprises superconducting
coils (201, 202), containers (203, 204) for containing the superconducting
coils and a refrigerant, a cooling section (208) for liquefying the gas in the
container produced through vaporization of the refrigerant, a pressure-detecting
section (215) for detecting the pressure in the container, a heat generating
section (216) for generating heat in at least one of the cooling section and the
container, a control section (127), and a computer (114). The control section
(127) controls heat generation of the heat generating section (216) depending
on the pressure detected at the pressure-detecting section (215). The computer
(114) judges whether the cooling section requires maintenance or not using heat
generation from the heat generating section (216).
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Inventors:
TSUDA MUNETAKA (JP)
Application Number:
PCT/JP2006/323224
Publication Date:
May 31, 2007
Filing Date:
November 21, 2006
Export Citation:
Assignee:
HITACHI MEDICAL CORP (JP)
TSUDA MUNETAKA (JP)
TSUDA MUNETAKA (JP)
International Classes:
A61B5/055; G01R33/28; G01R33/3815; H01F6/04
Foreign References:
| JPH0669030A | 1994-03-11 | |||
| JP2002336216A | 2002-11-26 | |||
| JPH01110356A | 1989-04-27 | |||
| JP2005005574A | 2005-01-06 | |||
| JP2002119493A | 2002-04-23 |
Attorney, Agent or Firm:
KASUGA, Yuzuru (4-1 Nihonbashi-honcho 3-chome, Chuo-k, Tokyo 23, JP)
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