EP0138269A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Nuclear magnetic resonance apparatus
Assignee: Koninklijke Philips NV
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Filing: 1984-10-05
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Granted: —
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Expires: 2004-10-05
Abstract
Abstract Inside the gradient coils in the magnet system of a nuclear magnetic resonance apparatus there is arranged a sleeve which forms a noise-absorbing shield between the gradient coils and the measurement space in the magnet. The shield is preferably formed by an evacuatable space between the sleeve and a support for the gradient coils. This space is then provided with elastic vacuum seals at its axial ends.
Inventors
- 👤 Chritien Jacques Marie Beaumont
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-02 00:28
CPC Classifications
G; G01; G01R; G01R33/00; G01R33/20; G01R33/28; G01R33/38; G01R33/385; G01R33/3854; Y; Y10; Y10S; Y10S505/00; Y10S505/825; Y10S505/842; Y10S505/843; Y10S505/844
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
62 words
A nuclear magnetic resonance apparatus, comprising a cylindrical electromagnetic main coil system (1) for generating a homogeneous magnetic field (H) in a measurement space (3) and a gradient coil system (5) for generating gradient fields in the measurement space, characterized in that a concentrically arranged sleeve (10) forms a noise-absorbing shield between the measurement space (3) and the gradient coil system (5).
Claim 2
Dependent Claim
62 words
A nuclear magnetic resonance apparatus, comprising a cylindrical electromagnetic main coil system (1) for generating a homogeneous magnetic field (H) in a measurement space (3) and a gradient coil system (5) for generating gradient fields in the measurement space, characterized in that a concentrically arranged sleeve (10) forms a noise-absorbing shield between the measurement space (3) and the gradient coil system (5).
Claim 3
Dependent Claim
47 words
A nuclear magnetic resonance apparatus as claimed in Claim 1, characterized in that in conjunction with seals (14) which are provided at its axial ends, the sleeve forms a space (12) which can be evacuated and which extends between the measurement space and the gradient coil system.
Claim 4
Dependent Claim
23 words
A nuclear magnetic resonance apparatus as claimed in Claim 2, characterized in that the axial seals are formed by inflatable hollow elastic rings.
Claim 5
Dependent Claim
39 words
A nuclear magnetic resonance apparatus as claimed in Claim 1, characterized in that the sleeve forms an integral unit with a support (4) for the gradient coil system (5), thus forming an intermediate space (12) which can be evacuated.
Claim 6
Dependent Claim
29 words
A nuclear magnetic resonance apparatus as claimed in Claim 1, 2, 3 or 4, characterized in that the sleeve is made of plastics having a comparatively low thermal conductivity.
Claim 7
Dependent Claim
36 words
A nuclear magnetic resonance apparatus as claimed in Claim 1, characterized in that the sleeve is made of a noise-absorbing material and extends as far as against the support (4) for the gradient coil system (5).
Claim 8
Dependent Claim
30 words
A nuclear magnetic resonance apparatus as claimed in any one of the preceding Claims, characterized in that a cylinder surface of the sleeve is provided with a thermal radiation shield.
Claim 9
Dependent Claim
40 words
A nuclear magnetic resonance apparatus as claimed in any one of the preceding Claims, characterized in that the sleeve is constructed as a support for parts of the apparatus which are to be arranged in or near the measurement space.
Claim 10
Dependent Claim
22 words
A magnet system, evidently intended for use in a nuclear magnetic resonance apparatus as claimed in any one of the preceding Claims.
References Cited (Backward Citations)
No citation records indexed.
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