Transmission line for use in magnetic resonance system
First Claim
1. An electrically conductive transmission cable configured for safely treating a patient with a pulsed DC signal, in the presence of radiofrequency fields in a magnetic resonance environment the transmission cable being configured toreceive an RF modulated DC signal, the transmission cable comprising:
- a transmission line comprising at least a first segment and a second segment, wherein the first and second segments are electrically connected to each other by a reactive coupling unit;
a rectifier unit connected to the transmission line and configured to extract the pulsed DC signal from the RF modulated DC signal; and
electrodes connected with the rectifier configured to apply the extracted pulsed DC signal to the patient.
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Accused Products
Abstract
An electrically conductive transmission cable for supplying a DC signal safely to an electrical device in the presence of radio-frequency (RF) fields in a magnetic resonance (MR) is disclosed herein. The transmission cable comprises a transmission line (STL) comprising at least a first segment (S1) and a second segment (S2), wherein the first and second segments are electrically connected to each other by a reactive coupling unit (103), and a rectifier unit (101) connected to the transmission line and configured to extract the DC signal (203) from the modulated DC signal (201). The extracted DC signal may be supplied to an electrical device or used for cardiac pacing. The transmission cable finds application in auxiliary devices used in an MR environment, for example an interventional catheter with or without an active tracking circuit (301).
59 Citations
18 Claims
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1. An electrically conductive transmission cable configured for safely treating a patient with a pulsed DC signal, in the presence of radiofrequency fields in a magnetic resonance environment the transmission cable being configured to
receive an RF modulated DC signal, the transmission cable comprising: -
a transmission line comprising at least a first segment and a second segment, wherein the first and second segments are electrically connected to each other by a reactive coupling unit; a rectifier unit connected to the transmission line and configured to extract the pulsed DC signal from the RF modulated DC signal; and electrodes connected with the rectifier configured to apply the extracted pulsed DC signal to the patient. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A magnetic resonance system configured for safely treating a patient using a pulsed DC signal in an MR environment, the system comprising:
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a modulator which modulates a pulsed DC signal with a radio frequency carrier in order to generate an RF modulated DC signal; an electrically conductive transmission cable configured for safely transmitting the RF modulated DC signal, the transmission cable including; a transmission line comprising at least a first segment and a second segment, wherein the first and second segments are electrically connected to each other by a reactive coupling unit; a rectifier unit connected to the transmission line and configured to extract the pulsed DC signal from the RF modulated DC signal; and electrodes connected to the rectifier in order to apply the extracted pulsed DC signal to anatomical tissue of a patient.
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15. A method for safely treating a patient using a pulsed DC signal in the presence of radiofrequency fields in an MR environment, the method comprising:
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generating a pulsed DC signal; modulating the pulsed DC signal with an AC signal in order to generate a modulated DC signal; transmitting the modulated DC signal on a transmission line which includes a plurality of reactively coupled segments; rectifying the modulated DC signal which has been transmitted on the transmission line in order to recover the pulsed DC signal; applying the recovered pulsed DC signal to a patient; and concurrently performing a magnetic resonance procedure while the generating, modulating, transmitting, rectifying, and applying steps of the method are carried out. - View Dependent Claims (16, 17, 18)
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Specification