ShareLiquid helium cryostat for SQUID-based MRI receivers.
Author(s) : SETON H. C., HUTCHISON J. M. S., BUSSELL D. M.
Type of article: Article
Summary
The authors describe a liquid helium cryostat, developed to cool SQUID-based receivers in low field MRI systems. The cryostat has a 4 L liquid helium capacity, a hold time of over 3 days and accommodates 10 cm diameter receiver coils. New vacuum insulation methods reduce the noise level by at least an order of magnitude compared to existing commercial designs. Further measurements indicated that most of this field noise probably originates with dielectric losses in the cryostat's fibreglass shells.
Details
- Original title: Liquid helium cryostat for SQUID-based MRI receivers.
- Record ID : 2005-2412
- Languages: English
- Source: Cryogenics - vol. 45 - n. 5
- Publication date: 2005/05
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