| 摘要 |
The invention relates to an MR arrangement which includes a medical instrument ( 3 ), an RF arrangement ( 17 ) which is provided thereon and in which at least one microcoil ( 1 ) and a capacitor ( 2 ) are connected so as to form a resonant circuit, and also an optical signal lead ( 4 ) via which a light signal is applied to the RF arrangement. In order to achieve simple and fast determination of the position of the medical instrument ( 3 ) within the examination zone of an MR apparatus, the invention proposes to provide a modulator ( 20 ) for modulating the light signal applied to the RF arrangement and also an optoelectrical converter ( 5 ) which converts the modulated light signal into an electrical signal and is coupled to the resonant circuit in such a manner that the resonant circuit is triggered by the electrical signal from the optoelectrical converter ( 5 ) so as to emit an RF field.
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