Signal processing in a magnetic resonance tomography device

Patent metadata

Field	Value
Publication number	US-10436868-B2
Application number	US-201514828646-A
Country	US
Kind code	B2
Filing date	Aug 18, 2015
Priority date	Aug 19, 2014
Publication date	Oct 8, 2019
Grant date	Oct 8, 2019

Abstract

A magnetic resonance tomography system includes a computer configured to implement signal processing of transmit signals and/or receive signals. The signal processing is configured to implement a mixer, an upsampler, a decimator, a filter, or any combination thereof.

First claim

The invention claimed is:

1. A magnetic resonance tomography system comprising:
a computer comprising:
a memory in which computer-readable instructions are stored;
a processor configured by the computer-readable instructions to implement signal processing of transmit signals and receive signals; and
a mixer, an upsampler, a decimator, a filter, or any combination thereof configured for the signal processing of the transmit signals and the receive signals with the memory and the processor,

wherein the processor is configured by the computer-readable instructions to establish coherence between a transmit signal and a receive signal by sampling the transmit signal by a temporal relation of the receive signal relative to the transmit signal via a time stamp in data representing the receive signal,
wherein the computer is configured to generate a magnetic resonance tomography image using the receive signal determining a phase relationship from the time stamp data, and
wherein the magnetic resonance tomography system is configured to store or display the generated magnetic resonance tomography image.

2. The magnetic resonance tomography system of claim 1 , wherein the processor is configured by the computer-readable instructions to implement the upsampler for the signal processing of the transmit signals.

3. The magnetic resonance tomography system of claim 1 , wherein the processor is configured by the computer-readable instructions to implement the decimator for the signal processing of the receive signals.

4. The magnetic resonance tomography system of claim 1 , wherein the processor is configured by the computer-readable instructions to implement the filter for the signal processing of the transmit signals, the receive signals, or both the transmit and receive signals.

5. The magnetic resonance tomography system of claim 1 , wherein the processor is configured by the computer-readable instructions to implement the mixer for the signal processing of the transmit signals, the receive signals, or both the transmit and receive signals.

6. The magnetic resonance tomography system of claim 1 , wherein the magnetic resonance tomography system is configured to record the receive signal in a receive path and the transmit signal, and to implement phase-sensitive methods of signal processing to calculate coherence information for the receive signal from the transmit signal.

7. A method for signal processing in a magnetic resonance tomography system, the method comprising:
signal processing, by a computer of the magnetic resonance tomography system, transmit signals and receive signals, wherein the signal processing is configured to implement a mixer, an upsampler, a decimator, a filter, or any combination thereof, and wherein the signal processing comprises sampling a transmit signal by a temporal relation of a receive signal relative to the transmit signal via a time stamp in data representing the receive signal, therein establishing coherence between the transmit signal and the receive signal;
generating, by the computer, a magnetic resonance tomography image using the processed receive signal determining a phase relationship from the time stamp data; and
storing or displaying the generated magnetic resonance tomography image.

8. The method of claim 7 , wherein implementing the signal processing comprises implementing the upsampler for the signal processing of the transmit signals.

9. The method of claim 7 , wherein implementing the signal processing comprises implementing the decimator for the signal processing of the receive signals.

10. The method of claim 7 , wherein implementing the signal processing comprises implementing the filter for the signal processing of the transmit signals, the receive signals, or both the transmit and receive signals.

11. The method of claim 7 , wherein implementing the signal processing comprises implementing the mixer for the signal processing of the transmit signals, the receive signals, or both the transmit and receive signals.

12. The method of claim 7 , further comprising:
recording the receive signal and the transmit signal in a receive path of the magnetic resonance tomography system; and
calculating coherence information for the receive signal from the transmit signal with phase-sensitive methods of signal processing.

13. A magnetic resonance tomography system comprising:
a computer comprising:
a memory in which computer-readable instructions are stored;
a processor configured by the computer-readable instructions to implement signal processing of transmit signals and receive signals;
a first mixer configured to generate a transmit signal;
an upsampler configured to convert the transmit signal to a higher sampling range;
a first filter configured to filter the upsampled transmit signal;
a second mixer configured to synchronize a signal received from hardware of the magnetic resonance tomography system and a transmit signal received from the first mixer;
a second filter configured to filter the synchronized signal from the second mixer; and
a decimator configured to downsample the filtered signal from the second filter to a lower sampling range,

wherein the computer is configured to process the downsampled signal to generate a magnetic resonance tomography image.

Assignees

• Demharter Nikolaus
• Siemens Ag

Inventors

• Demharter Nikolaus

Classifications

• G01R33/4822

  in three dimensions · CPC title

• G01R33/482

  using a Cartesian trajectory · CPC title

• G01R33/4826

  in three dimensions · CPC title

• G01R33/4816

  NMR imaging of samples with ultrashort relaxation times such as solid samples, e.g. MRI using ultrashort TE [UTE], single point imaging, constant time imaging · CPC title

• G01R33/4824

  using a non-Cartesian trajectory · CPC title