MR device provided with a medical instrument, and method of determining the position of the medical instrument
First Claim
1. A magnetic resonance (MR) device which is provided with a medical instrument which is to be introduced into an object to be examined,the medical instrument comprising a receiving coil system which is arranged in the instrument including a coil system comprising at least one coil for receiving and/or transmitting an RF signal as a resonant circuit in conjunction with a capacitor, and wherein the receiving coil system further comprises a modulation unit for modulating an RF signal coupled into the coil system.
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Accused Products
Abstract
The invention relates to a magnetic resonance (MR) device which is provided with a medical instrument (10) which is to be introduced into an object (1) to be examined, and also with a coil system (11) which is arranged in or on the instrument (10) and includes at least one coil for receiving and/or transmitting an RF signal, to a medical instrument (10) of this kind and also to a method of determining the position of such a medical instrument (10) that can be introduced into an object (1) to be examined. According to the invention the coil system (11) in an MR device of this kind forms a resonant circuit (20) in conjunction with a capacitor (19) and a modulation unit (12) is provided in order to modulate an RF signal coupled into the coil system (11).
167 Citations
18 Claims
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1. A magnetic resonance (MR) device which is provided with a medical instrument which is to be introduced into an object to be examined,
the medical instrument comprising a receiving coil system which is arranged in the instrument including a coil system comprising at least one coil for receiving and/or transmitting an RF signal as a resonant circuit in conjunction with a capacitor, and wherein the receiving coil system further comprises a modulation unit for modulating an RF signal coupled into the coil system.
- 10. A medical instrument for introduction into an object to be examined by magnetic resonance (MR) imaging comprising a receiving coil system which includes a coil system comprising at least one coil for receiving and/or transmitting an RF signal, wherein the coil system constitutes a resonant circuit in conjunction with a capacitor, and wherein the receiving coil system further includes a modulation unit for modulating an RF signal coupled into the coil system.
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11. A method of determining the position of a medical instrument in an object to be examined by magnetic resonance (MR) imaging comprising:
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introducing the medical instrument into the object to be examined arranged in the examination zone of an MR device, modulating an RF signal coupled into a receiving coil system of the MR device which includes a coil system comprising at least one coil for receiving and/or transmitting an RF signal and constitutes a resonant circuit in conjunction with a capacitor, the receiving coil system being arranged in the medical instrument, and determining the position of the medical instrument from an MR signal comprising a modulated coil signal received by the receiving coil system. - View Dependent Claims (12, 13, 14)
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Specification