Wireless-type RF coil and transmitter for legacy magnetic resonance imaging (MRI) systems and method of operation thereof

Patent metadata

Field	Value
Publication number	US-10598744-B2
Application number	US-201615561536-A
Country	US
Kind code	B2
Filing date	Mar 14, 2016
Priority date	Mar 31, 2015
Publication date	Mar 24, 2020
Grant date	Mar 24, 2020

Abstract

A transmission apparatus for legacy magnetic resonance (MR) systems including one or more of a radio transmission portion having coupling to an analog RF cable port of the MR system including at least one first controller, an analog-to-digital converter (A/D), and a transmitter. The first controller controls the A/D to digitize analog magnetic resonance (MR) information received from the RF coil and controls the transmitter to transmit the digitized MR information. A radio reception portion including an analog output port and a coupler for coupling the output port to a legacy cable port input of the legacy system including at least one second controller, a receiver, and a digital-to-analog converter (D/A). The second controller controls the receiver to receive the transmitted digitized MR information, and controls the D/A to perform a digital-to-analog conversion to form a corresponding analog MR signal which is output at the output port.

First claim

The invention claimed is:

1. A transmission apparatus for a legacy magnetic resonance (MR) system, comprising:
a radio-frequency (RF) transmission portion having a coupler for coupling to an analog radio frequency (RF) cable port of an RF coil, the RF transmission portion comprising at least one first controller, an analog-to-digital converter (A/D), and a first digital transceiver, the first controller being configured to control the A/D to digitize analog magnetic resonance (MR) information received from the RF coil and to control the first digital transceiver to transmit the digitized MR information; and
a radio-frequency (RF) reception portion having an analog output port and a coupler for coupling the analog output port to a legacy RF cable port input of the legacy MR system, the RF reception portion comprising: at least one second controller; a second digital transceiver; a digital-to-analog converter (D/A), the at least one second controller being operative to control the second digital transceiver to receive the transmitted digitized MR information, and to control the D/A to perform a digital-to-analog conversion upon received digitized MR information to form a corresponding analog MR signal which is output at the analog output port; and a gain controller operative to control the gain of the analog MR signal prior to the output,
wherein: the first digital transceiver and the second digital transceiver communicate with each other using a bi-directional digital data transfer method; and the gain controller determines an average of the analog MR signal, and compares the average to a threshold desired gain control threshold (GCT) value.

2. The transmission apparatus of claim 1 , wherein the gain controller adjusts the gain of the analog MR signal based upon results of the comparison.

3. The transmission apparatus of claim 1 , further comprising at least one of a wireless or optical transmitter, to perform the transmission of the digitized MR information.

4. The transmission apparatus of claim 1 , wherein the RF reception portion further comprises analog filters which filter the analog MR signal prior to the gain control.

5. The transmission apparatus of claim 1 , wherein the digital data transfer method includes at least one selected from the group of encoding on a carrier frequency and a handshaking signals.

6. A transmission apparatus for a legacy magnetic resonance (MR) system, comprising:
a transmit-type radio frequency (RF) coil comprising a plurality of receive-loops for receiving induced MR signals from an object-of-interest (OOI) subject to MR sequence signals, and at least one first controller, the at least one first controller configured to form MR information based upon the received induced MR signals, digitize the MR information, and to transmit the MR information as a digital data stream signal with a first digital transceiver; and
a radio-frequency (RF) reception portion having an analog output port and a coupler for coupling the analog output port to a legacy RF cable port input of the legacy MR system, the RF reception portion comprising: at least one second controller; a second digital transceiver; a digital-to-analog converter (D/A), the at least one second controller operative to control the second digital transceiver to receive the transmitted digitized MR information, and control the D/A to perform a digital-to-analog conversion upon received digitized MR information to form a corresponding analog MR signal which is output at the analog output port; and a gain controller operative to control the gain of the analog MR signal prior to the output,
wherein: the first digital transceiver and the second digital transceiver are bi-directional transceivers that communicate with each other using a digital data transfer method; and the gain controller determines an average of the analog MR signal, and compares the average to a threshold desired gain control threshold (GCT) value.

7. The transmission apparatus of claim 6 , wherein the gain controller adjusts the gain of the analog MR signal based upon results of the comparison.

8. The transmission apparatus of claim 6 , further comprising at least one of a wireless or optical transmitter, to perform the transmission of the digitized MR information.

9. The transmission apparatus of claim 6 , wherein the RF reception portion further comprises analog filters which filter the analog MR signal prior to the gain control.

10. The transmission apparatus of claim 6 , further comprising a wireless-type RF coil adapted to receive emitted MR signals.

11. A method for upgrading a legacy MR system, the method comprising:
coupling to an analog RF cable port of an RF coil;
performing an analog-to-digital conversion to digitize analog magnetic resonance (MR) information received from the RF coil;
transmitting wirelessly the digitized MR information with a first digital transceiver;
receiving the wirelessly transmitted digitized MR information with a second digital transceiver, wherein the first digital transceiver and the second digital transceiver are bi-directional transceivers that communicate with each other using a digital data transfer method;
performing a digital-to-analog conversion upon the received digitized MR information to form a corresponding analog MR signal; and
outputting the corresponding analog MR signal to an output port;
coupling the output port to a legacy RF cable port input of the legacy MR system;
controlling gain of the analog MR signal prior to the output port; and
determining an average of the analog MR signal, and comparing the average to a threshold desired gain control threshold (GCT) value.

12. The method of claim 11 , comprising an act of adjusting the gain of the analog MR signal based upon results of the comparison.

13. The method of claim 11 , comprising an act of filtering the analog MR signal prior to the gain control.

14. The method of claim 11 , wherein the digital data transfer method includes at least one selected from the group of encoding on a carrier frequency and a handshaking signals.

15. A non-transitory tangible computer-readable storage medium, comprising instructions which, when executed by a processor, cause the processor to perform the method of claim 11 .

Assignees

• Koninklijke Philips Nv

Inventors

• Duensing George Randall
• Reykowski Arne
• Ortiz Timothy

Classifications

• G01R33/3621

  NMR receivers or demodulators, e.g. preamplifiers, means for frequency modulation of the MR signal using a digital down converter, means for analog to digital conversion [ADC] or for filtering or processing of the MR signal such as bandpass filtering, resampling, decimation or interpolation · CPC title

• G01R33/3692 Primary

  involving signal transmission without using electrically conductive connections, e.g. wireless communication or optical communication of the MR signal or an auxiliary signal other than the MR signal · CPC title