| 摘要 |
The invention concerns an apparatus for generating and/or detecting radio frequency (RF)-B1 fields in an investigational volume ( 10 ) of a magnetic resonance (MR) device, wherein the apparatus comprises a tubular surface coil ( 1; 20; 30; 41-44; 51-54; 61 ) which is formed from a conducting strip and is capacitively closed at least two neighboring ends, wherein the ratio between length L and width W of the strip is <=30, and wherein the volume under investigation ( 10 ) is disposed outside of the space surrounded by the strip, bordering an outer surface ( 9 ) of the surface coil ( 1; 20; 30; 41-44; 51-54; 61 ) such that the B1 field lines, generated by the surface coil ( 1; 20; 30; 41-44; 51-54; 61 ) in the volume under investigation ( 10 ) extend substantially parallel to this outer surface ( 9 ) thereby producing an NMR transmitting and receiving apparatus with improved properties, in particular, one permitting precise influence of the distribution of the RF-B1 field.
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