A method and device for magnetic resonance imaging data acquisition guided by physiologic feedback

Patent metadata

Field	Value
Publication number	US-2017332981-A1
Application number	US-201515522098-A
Country	US
Kind code	A1
Filing date	Oct 27, 2015
Priority date	Oct 31, 2014
Publication date	Nov 23, 2017
Grant date	—

Abstract

An adaptive real-time radial k-space sampling trajectory (ARKS) can respond to a physiologic feedback signal to reduce motion effects and ensure sampling uniformity. In this adaptive k-space sampling strategy, the most recent signals from an ECG waveform can be continuously matched to the previous signal history, new radial k-space locations c were determined, and these MR signals combined using multi-shot or single-shot radial acquisition schemes. The disclosed methods allow for improved

First claim

1 . A method of making a Magnetic Resonance Imaging (MRI) image of a body part from MRI data, comprising:
obtaining physiologic data; analyzing the physiologic data to determine at least one previous time that the body part was in a similar position to the current position; analyzing MRI hardware-controllable settings used at the at least one previous time to determine new MRI hardware-controllable settings; scanning the body part with the new MRI hardware-controllable settings to produce new MRI data; and producing the MRI image using the new MRI data.

2 . The method of claim 1 wherein the physiologic data is a heart signal.

3 . The method of claim 1 , wherein the physiologic data is an electrocardiogram (ECG).

4 . The method of claim 1 , wherein an autocorrelation on the physiologic data is done to determine the at least one previous time.

5 . The method of claim 1 , wherein the MRI hardware-controllable settings are settings to control the magnetic fields and radiofrequency pulses of the MRI and correspond to k-space values of the time domain MRI signal.

6 . The method of claim 5 , wherein the new MRI hardware-controllable settings are such that the k-space values for the new MRI hardware-controllable settings differ from the k-space values for MRI hardware-controllable settings.

7 . The method of claim 1 , wherein the new MRI data along with previous MRI data from the at least one previous time is used to produce the MRI image.

8 . The method of, wherein the MRI image is a frame in an MRI cine.

9 . A Magnetic Resonance Imaging (MRI) device configured to make an MRI image of a body part from MRI data, comprising:
a sensor to obtain physiologic data; a controller to analyze the physiologic data to determine at least one previous time that the body part was in a similar position to the current position, the controller analyzing MRI hardware-controllable settings used at the at least one previous time to determine new MRI hardware-controllable settings; a MRI scanner to scan the body part with the new MRI hardware-controllable settings so as to produce new MRI data; and an image processor to produce the MRI image using the new MRI data.

10 . The MRI device of claim 9 , wherein the sensor is a heart sensor and the physiologic data is a heart signal.

11 . The MRI device of claim 9 , wherein the physiologic data is an electrocardiogram (ECG).

12 . The MRI device of claim 9 , wherein the controller does an autocorrelation on the physiologic data is done to determine the at least one previous time.

13 . The MRI device of claim 9 , wherein the MRI hardware-controllable settings are settings to control the magnetic fields and radiofrequency pulses of the MRI scanner and correspond to k-space values of the time domain MRI signal.

14 . The MRI device of claim 9 , wherein the new MRI hardware-controllable settings are such that the k-space values for the new MRI hardware-controllable settings differ from the k-space values for MRI hardware-controllable settings.

15 . The MRI device of claim 9 , wherein the new MRI data along with previous MRI data from the at least one previous time is used to produce the MRI image.

16 . The MRI device of claim 9 , wherein the MRI image is a frame in an MRI cine.

17 . A method of making an Magnetic Resonance Imaging (MRI) image of a heart from MRI data comprising:
obtaining physiologic data; analyzing the physiologic data to determine at least one previous time that the heart was in a similar position to the current position; analyzing MRI hardware-controllable settings used at the at least one previous time to determine new MRI hardware-controllable settings; scanning the heart with the new MRI hardware-controllable settings to produce new MRI data; and producing the MRI image of the heart using the new MRI data.

18 . The method of claim 17 , wherein an autocorrelation on the physiologic data is done to determine the at least one previous time.

19 . The method of claim 17 , wherein the MRI hardware-controllable settings are settings to control the magnetic fields and radiofrequency pulses of the MRI and correspond to k-space values of the time domain MRI signal.

20 . The method of claim 17 , wherein the new MRI data along with previous MRI data from the at least one previous time is used to produce the MRI image.

Assignees

• Univ Pennsylvania

Inventors

• Witschey Walter R T
• Contijoch Francisco
• Elliott Mark A
• Gualtieri Eugene E

Classifications

• A61B5/0044

  for the heart · CPC title

• A61B5/7289 Primary

  Retrospective gating, i.e. associating measured signals or images with a physiological event after the actual measurement or image acquisition, e.g. by simultaneously recording an additional physiological signal during the measurement or image acquisition · CPC title

• G01R33/56325

  Cine imaging · CPC title

• A61B5/055

  involving electronic [EMR] or nuclear [NMR] magnetic resonance, e.g. magnetic resonance imaging · CPC title

• G01R33/4824

  using a non-Cartesian trajectory · CPC title