Method and device for dynamic effects correction in medical imaging

Patent metadata

Field	Value
Publication number	US-10275875-B2
Application number	US-201615092843-A
Country	US
Kind code	B2
Filing date	Apr 7, 2016
Priority date	Apr 7, 2015
Publication date	Apr 30, 2019
Grant date	Apr 30, 2019

Abstract

A method for automatically and dynamically optimizing image acquisition parameters/commands of an imaging procedure performed by a medical imaging apparatus in order to mitigate or cancel dynamic effects perturbing the image acquisition process of an object to be imaged by the medical imaging apparatus. The method includes connecting a dynamic correction module (DCM) to the medical imaging apparatus, automatically acquiring by the DCM image acquisition parameters/commands and data about dynamic changes or effects, and automatically determining in real time, by the DCM, at least one new image acquisition parameter/command from the image acquisition parameters/commands defined in the imaging control system and the dynamic change data, while the image acquisition parameter/command defined in the imaging control system remains unchanged. The method further includes automatically providing, by the DCM, the new image acquisition parameter/command to the hardware control system.

First claim

The invention claimed is:

1. A method for automatically and dynamically optimizing image acquisition parameters or commands of an imaging procedure performed by a medical imaging apparatus to mitigate or cancel dynamic effects perturbing an image acquisition process of an object to be imaged by the medical imaging apparatus, which comprises the steps of:
a). connecting a dynamic correction module (DCM) to the medical imaging apparatus;
b). automatically acquiring by the DCM dynamic change data containing dynamic changes or effects and the image acquisition parameters or commands defined by an imaging control system of the medical imaging apparatus, the imaging control system being separate from and decoupled from the DCM;
c). automatically determining in real time, by means of the DCM, at least one new image acquisition parameter or command from the dynamic change data and the image acquisition parameters or commands defined in the imaging control system, the new image acquisition parameter or command being one of the image acquisition parameters or commands defined in the imaging control system, but optimized for a dynamic change, while the one image acquisition parameter or command defined in the imaging control system and corresponding to the new image acquisition parameter or command remaining free of any adaptation to the dynamic change data, wherein the image acquisition process being controlled by programmed instructions of the imaging control system for defining and controlling the imaging procedure during imaging acquisition, wherein a correction or optimization process performed by the DCM are completely decoupled from the imaging control system, so that the image acquisition parameters or commands defined in the imaging control system for controlling a current image acquisition remain free of any adaptation to the dynamic change data during the current image acquisition; and
d). automatically providing, by means of the DCM, the new image acquisition parameter or command to a hardware control system controlling the medical imaging apparatus.

2. The method according to claim 1 , wherein the dynamic change data are data related to a detection or measurement of a dynamic effect that might degrade a quality of an image obtained for the object by means of the medical imaging apparatus.

3. The method according to claim 1 , wherein the dynamic change data contains at least one of information about a motion of at least one part of the object, a technical change of the medical imaging apparatus or parts of it, or an environmental change of an imaged volume or an imaged object/subject.

4. The method according to claim 1 , wherein the image acquisition parameters or commands are defined by an imaging control system of the medical imaging apparatus for performing the imaging procedure projected by the medical imaging apparatus for imaging the object.

5. The method according to claim 1 , wherein the image acquisition parameters or commands define at least one part of the imaging procedure.

6. The method according to claim 1 , wherein the image acquisition parameters or commands are data/control commands configured for controlling a medical imaging device of the medical imaging apparatus by a hardware control system.

7. The method according to claim 1 , wherein the medical imaging apparatus is a magnetic resonance imaging apparatus and the image acquisition parameters or commands are data/commands about at least one of a gradient pulse, a radio frequency pulse, or a radio frequency data sampling.

8. The method according to claim 1 , which further comprises acquiring, via the DCM, the dynamic change data from at least one source of the medical imaging apparatus, wherein the source is configured for measuring/detecting at least one dynamic effect.

9. The method according to claim 8 , which further comprises configuring the DCM to combine the dynamic change data of at least two sources for optimizing a correction of the imaging procedure for a single dynamic effect.

10. A dynamic correction module (DCM) for optimizing in real-time image acquisition parameters or commands of an imaging procedure performed by a medical imaging apparatus for imaging an object, the DCM comprising:
connections means for connecting the DCM to the medical imaging apparatus;
a processing unit for processing dynamic change data and the image acquisition parameters or commands received from an imaging control system of the medical imaging apparatus; and
a computer readable medium having a memory for storing computer executable instructions, that, when executed, cause said processing unit to perform the steps of:
automatically acquiring by the DCM the dynamic change data containing dynamic changes or effects and the image acquisition parameters or commands defined by the imaging control system of the medical imaging apparatus;
automatically determining in real time, by means of the DCM, at least one new image acquisition parameter or command from the dynamic change data and the image acquisition parameters or commands defined in the imaging control system, the new image acquisition parameter or command being one of the image acquisition parameters or commands defined in the imaging control system, but optimized for a dynamic change, while the one image acquisition parameter or command defined in the imaging control system and corresponding to the new image acquisition parameter or command remaining free of any adaptation to the dynamic change data, wherein the image acquisition process being controlled by programmed instructions of the imaging control system for defining and controlling the imaging procedure during imaging acquisition, wherein a correction or optimization process performed by the DCM are completely decoupled from the imaging control system, so that the image acquisition parameters or commands defined in the imaging control system for controlling a current image acquisition remain free of any adaptation to the dynamic change data during the current image acquisition; and
automatically providing, by means of the DCM, the new image acquisition parameter or command to a hardware control system controlling the medical imaging apparatus.

11. The DCM according to claim 10 , wherein said computer executable instructions contain several optimization procedures/models for optimizing the image acquisition parameters or commands in dependence on dynamic changes occurring in real-time during imaging of the object by means of the medical imaging apparatus, wherein each optimization procedure is configured for mitigating one dynamic effect.

12. The DCM according to claim 10 , wherein the DCM is configured for combining the dynamic change data acquired from at least one source of the medical imaging apparatus, wherein the source is configured for measuring/detecting at least one dynamic effect, the DCM being further configured for combining the dynamic change data of at least two sources for optimizing a correction of the imaging procedure for a single dynamic effect.

13. A magnetic resonance imaging apparatus for imaging an object, comprising:
a hardware control system;
an imaging control system;
a dynamic correction module (DCM) for optimizing in real-time image acquisition parameters or commands of an imaging procedure performed by the magnetic resonance imaging apparatus for imaging the object, the DCM containing:
connections means for connecting said DCM to other parts of the magnetic resonance imaging apparatus;
a processing unit for processing dynamic change data and the image acquisition parameters or commands received from said imaging control system; and
a computer readable medium

Assignees

• Siemens Healthcare Gmbh

Inventors

• Bhat Himanshu
• Feiweier Thorsten
• Kober Tobias
• Prinz Carsten
• Splitthoff Daniel Nico
• Stoecker Stephan

Classifications

• G01R33/56563

  caused by a distortion of the main magnetic field B0, e.g. temporal variation of the magnitude or spatial inhomogeneity of B0 (G01R33/56509, G01R33/56518, G01R33/56536 take precedence) · CPC title

• G01R33/56509 Primary

  due to motion, displacement or flow, e.g. gradient moment nulling (G01R33/567 takes precedence) · CPC title

• G06T7/80

  Analysis of captured images to determine intrinsic or extrinsic camera parameters, i.e. camera calibration · CPC title

• G01R33/543

  Control of the operation of the MR system, e.g. setting of acquisition parameters prior to or during MR data acquisition, dynamic shimming, use of one or more scout images for scan plane prescription (G01R33/546 takes precedence) · CPC title

• A61B8/5276

  due to motion · CPC title