Title:
MAGNETIC RESONANCE IMAGING DEVICE AND METHOD OF OPERATING SAME
Document Type and Number:
WIPO Patent Application WO/2013/058062
Kind Code:
A1
Abstract:
The objective of the present invention is to extend the longevity of a cooler and to reduce idle periods of an MRI device due to maintenance of the cooler by controlling the cooling capacity of the cooler (107) of a superconducting magnet such that it exhibits roughly the same cooling and heat absorption as the quantity of heat that enters a refrigerant container (202) of the superconducting magnet in order to maintain the pressure of the refrigerant container (202) within a permissible range. Additionally, either the change in magnetic field strength or magnetic homogeneity of an imaging space that accompanies pressure change inside the refrigerant container (202) is compensated with a magnetic field adjusting unit.
Inventors:
TSUDA MUNETAKA (JP)
Application Number:
PCT/JP2012/074422
Publication Date:
April 25, 2013
Filing Date:
September 24, 2012
Export Citation:
Assignee:
HITACHI MEDICAL CORP (JP)
International Classes:
A61B5/055; G01R33/3815; H01F6/04
Domestic Patent References:
| WO2007060950A1 | 2007-05-31 |
Foreign References:
| JP2011005091A | 2011-01-13 | |||
| JPH11317307A | 1999-11-16 |
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