EP0307981A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Magnetic resonance apparatus comprising integrated gradient r.f. coils
Assignee: Koninklijke Philips NV
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Filing: 1988-08-12
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Granted: —
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Expires: 2008-08-12
Abstract
Abstract In a magnetic resonance apparatus a gradient coil system and an r.f. coil are combined so as to form a magnetically, electrically and structurally integrated coil system. Thus, a substantial saving is realized as regards the activation energy required for generating gradient fields as well as for generating r.f. fields and notably r.f. stray-fields are also reduced.
Inventors
- 👤 Johannes Adrianus Overweg
- 👤 Wilhelmus Reinerius Maria Mens
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-09 08:29
CPC Classifications
G; G01; G01R; G01R33/00; G01R33/20; G01R33/28; G01R33/32; G01R33/34; G01R33/34046; G01R33/38; G01R33/385
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
59 words
A magnetic resonance apparatus, comprising a magnet system for generating a steady magnetic field, a magnet system for generating mutually perpendicular gradient fields, and an r.f. coil for generating a spatially uniform r.f. magnetic field, characterized in that the gradient coil system and the r.f. coil are combined so as to form a magnetically/structurally integrated gradient r.f. coil system.
Claim 2
Dependent Claim
59 words
A magnetic resonance apparatus, comprising a magnet system for generating a steady magnetic field, a magnet system for generating mutually perpendicular gradient fields, and an r.f. coil for generating a spatially uniform r.f. magnetic field, characterized in that the gradient coil system and the r.f. coil are combined so as to form a magnetically/structurally integrated gradient r.f. coil system.
Claim 3
Dependent Claim
35 words
A magnetic resonance apparatus as claimed in Claim 1, characterized in that current conductors of the gradient coil system and current conductors of the r.f. coil are situated in substantially the same cylinder generated surface.
Claim 4
Dependent Claim
29 words
A magnetic resonance apparatus as claimed in Claim 1 or 2, characterized in that current conductors of a gradient coil system act as shielding members for an r.f. coil.
Claim 5
Dependent Claim
56 words
A magnetic resonance apparatus as claimed in Claim 3, characterized in that the location of the current conductors of the gradient coil system and current conductors of the r.f. coil with respect to one another is adapted so as to obtain optimun spatial homogeneity of an r.f. transmitter field to be generated in a measuring space.
Claim 6
Dependent Claim
43 words
A magnetic resonance apparatus as claimed in Claim 3 or 4, characterized in that, viewed axially, current conductors of a gradient coil system which are situated further outwards are located so as to obtain optimum shielding of an r.f. stray-field at that area.
Claim 7
Dependent Claim
34 words
A magnetic resonance apparatus as claimed in any one of the preceding Claims, characterized in that current conductors of an r.f. coil are accommodated in recesses in structural members of a gradient coil system.
Claim 8
Dependent Claim
43 words
A magnetic resonance apparatus as claimed in any one of the preceding Claims, characterized in that, viewed axially, arc conductors of the coil system which are situated further outwards have a diameter which is larger than that of more centrally situated arc conductors.
Claim 9
Dependent Claim
39 words
A magnetic resonance apparatus as claimed in any one of the preceding Claims, characterized in that the integrated coil system is symmetrically situated with respect to two mutually perpendicular axial planes in order to enable a quadrature measuring method.
Claim 10
Dependent Claim
22 words
An integrated gradient r.f. coil system, evidently intended for a magnetic resonance apparatus as claimed in any one of the preceding Claims.
References Cited (Backward Citations)
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