Method for setting an operating parameter of a medical device and medical device

Patent metadata

Field	Value
Publication number	US-10788554-B2
Application number	US-201815901576-A
Country	US
Kind code	B2
Filing date	Feb 21, 2018
Priority date	Feb 22, 2017
Publication date	Sep 29, 2020
Grant date	Sep 29, 2020

Abstract

A method for setting an operating parameter of a medical device is provided. The method includes determining a current operating mode of the medical device. A time span available for setting the operating parameter is derived from the determined current operating mode. A setting range of the operating parameter necessary for fulfilling a pre-determined criterion is determined. A setting time necessary for setting the operating parameter according to the determined setting range is determined, and the operating parameter is set according to the setting range, provided the time span available for the setting is at least as long as the necessary setting time.

First claim

The invention claimed is:

1. A method for setting an operating parameter of a medical device, the method comprising:
determining a current operating mode of the medical device;
deriving a time span available for setting the operating parameter from the determined current operating mode;
determining a setting range of the operating parameter necessary for fulfilling a pre-determined criterion, the setting range being a range of values between a starting value of the operating parameter and a target value of the pre-determined criterion;
determining a setting time necessary for setting the operating parameter according to the determined setting range, the setting time being a time necessary to change a value of the operating parameter from the starting value to the target value; and
setting the operating parameter in the determined setting range when the derived time span available for the setting is at least as long as the determined setting time.

2. The method of claim 1 , further comprising carrying out a pre-scan,
wherein determining the necessary setting range comprises determining the necessary setting range using a scan result of the carried out pre-scan.

3. The method of claim 1 , further comprising evaluating a pre-determined sequence of process steps of the current operating mode,
wherein determining the time span available comprises determining the time span available taking into account an execution time of each of the pre-determined sequence of process steps that are insensitive to the setting of the operating parameter.

4. The method of claim 1 , wherein setting the operating parameter comprises setting a shim term of at least a second order of a magnetic field as the operating parameter.

5. The method of claim 1 , wherein the pre-determined criterion to be fulfilled includes a pre-determined limit value of a spatial homogeneity of a magnetic field.

6. The method of claim 5 , wherein the pre-determined limit value of the spatial homogeneity of the magnetic field is in an examination object.

7. The method of claim 1 , wherein the medical device is an imaging device, and the operating parameter is set once and used for a plurality of image recordings.

8. The method of claim 7 , wherein the plurality of image recordings are successive image recordings.

9. The method of claim 8 , further comprising separately setting and using at least one second operating parameter for each of the image recordings.

10. In a non-transitory computer-readable storage medium storing instructions executable by one or more processors to set an operating parameter of a medical device, the instructions comprising:
determining a current operating mode of the medical device;
deriving a time span available for setting the operating parameter from the determined current operating mode;
determining a setting range of the operating parameter necessary for fulfilling a pre-determined criterion, the setting range being a range of values between a starting value of the operating parameter and a target value of the pre-determined criterion;
determining a setting time necessary for setting the operating parameter according to the determined setting range, the setting time being a time necessary to change a value of the operating parameter from the starting value to the target value; and
setting the operating parameter in the determined setting range when the derived time span available for the setting is at least as long as the determined setting time.

11. The non-transitory computer-readable storage medium of claim 10 , wherein the instructions further comprise carrying out a pre-scan,
wherein determining the necessary setting range comprises determining the necessary setting range using a scan result of the carried out pre-scan.

12. The non-transitory computer-readable storage medium of claim 10 , wherein the instructions further comprise evaluating a pre-determined sequence of process steps of the current operating mode,
wherein determining the time span available comprises determining the time span available taking into account an execution time of each of the pre-determined sequence of process steps that are insensitive to the setting of the operating parameter.

13. The non-transitory computer-readable storage medium of claim 10 , wherein setting the operating parameter comprises setting a shim term of at least a second order of a magnetic field as the operating parameter.

14. The non-transitory computer-readable storage medium of claim 10 , wherein the pre-determined criterion to be fulfilled includes a pre-determined limit value of a spatial homogeneity of a magnetic field.

15. The non-transitory computer-readable storage medium of claim 14 , wherein the pre-determined limit value of the spatial homogeneity of the magnetic field is in an examination object.

16. A medical device comprising:
a controller configured to access a non-transitory computer-readable storage medium storing instructions and execute the instructions to:
determine a current operating mode of the medical device;
derive a time span available for setting the operating parameter from the determined current operating mode;
determine a setting range of the operating parameter necessary for fulfilling a pre-determined criterion, the setting range being a range of values between a starting value of the operating parameter and a target value of the pre-determined criterion;
determine a setting time necessary for setting the operating parameter according to the determined setting range, the setting time being a time necessary to change a value of the operating parameter from the starting value to the target value; and
setting the operating parameter in the determined setting range when the derived time span available for the setting is at least as long as the necessary setting time.

17. The medical device of claim 16 , wherein the medical device comprises a magnetic resonance tomograph.

Assignees

• Paul Dominik
• Splitthoff Daniel Nico
• Feiweier Thorsten
• Siemens Healthcare Gmbh

Inventors

• Paul Dominik
• Splitthoff Daniel Nico
• Feiweier Thorsten

Classifications

• A61B5/055

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

• A61B5/0037

  Performing a preliminary scan, e.g. a prescan for identifying a region of interest · CPC title

• G01R33/3875

  using correction coil assemblies, e.g. active shimming · CPC title

• G01R33/443

  Assessment of an electric or a magnetic field, e.g. spatial mapping, determination of a B0 drift or dosimetry · CPC title

• G01R33/543 Primary

  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