MRI cool down apparatus
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United States of America Patent
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Feb 20, 2018
Grant Date -
Dec 10, 2015
app pub date -
Jan 2, 2014
filing date -
Jan 11, 2013
priority date (Note) -
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Abstract
A means and a method to cool down an MRI magnet, in a cryostat that is designed for a maximum pressure of about 0.2 MPa, are described which use cold helium output from a Brayton cycle refrigerator at a pressure of about 0.8 MPa to exchange heat with helium in the MRI cryostat in a coupling heat exchanger that is located removeably in or proximate the neck tube of the MRI cryostat. A circulator drives helium from the MRI cryostat through the coupling heat exchanger.
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