发明授权
US07464556B2 Magnetic resonance apparatus with phase-aligned coupling-in of working gas pressure pulses
有权
具有相位对准的工作气体压力脉冲耦合的磁共振装置
- 专利标题: Magnetic resonance apparatus with phase-aligned coupling-in of working gas pressure pulses
- 专利标题(中): 具有相位对准的工作气体压力脉冲耦合的磁共振装置
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申请号: US11330163申请日: 2006-01-12
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公开(公告)号: US07464556B2公开(公告)日: 2008-12-16
- 发明人: Klaus Schlenga
- 申请人: Klaus Schlenga
- 申请人地址: DE Rheinstetten
- 专利权人: Bruker Biospin GmbH
- 当前专利权人: Bruker Biospin GmbH
- 当前专利权人地址: DE Rheinstetten
- 代理商 Paul Vincent
- 优先权: DE102005004269 20050129
- 主分类号: F25B9/00
- IPC分类号: F25B9/00 ; F25B19/00
摘要:
A magnetic resonance apparatus comprising a superconducting magnet coil disposed in a cryostat, and a refrigerator for cooling same comprising a compressor (1) for compressing a working gas, and a high-pressure line (2) and a low-pressure line (3) disposed between the compressor (1) and a control valve (5), which periodically connects the high-pressure line (2) and the low-pressure line (3) to at least one connecting line (6) between the control valve (5) and a cold head (4) of the refrigerator, thereby producing pressure pulses through the switched working gas, wherein the control valve (5) and/or connecting line (6) and cold head (4) components are rigidly mechanically coupled to the cryostat, is characterized in that at least one of the above-mentioned lines (2, 3, 6) is branched on the compressor side upstream of the rigidly coupled components, and is symmetrically joined at one of the coupled components in such a manner that the pressure pulses through the working gas are vectorially compensated for at the component where the branched line is joined, thereby minimizing vibrations of the cryostat. The inventive magnetic resonance apparatus greatly reduces transmission of oscillations to the magnet coil and thereby the number and strength of artefacts in the spectra or images acquired with this magnetic resonance apparatus, to ensure high-quality magnetic resonance recordings.
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