Adaptive segmentation for rotational C-arm computed tomography with a reduced angular range

Patent metadata

Field	Value
Publication number	US-10417765-B2
Application number	US-201615542777-A
Country	US
Kind code	B2
Filing date	Jan 6, 2016
Priority date	Jan 14, 2015
Publication date	Sep 17, 2019
Grant date	Sep 17, 2019

Abstract

The present invention relates to a system ( 1 ) for adaptive segmentation. The system ( 1 ) comprises a configurator ( 10 ), which is configured to determine an adapted angular range (AR) with respect to an operation mode of the system ( 1 ) and which is configured to determine a segmentation parameter (SP) based on the adapted angular range (AR). Further, the system comprises an imaging sensor ( 20 ), which is configured to acquire images (I 1 , . . . , I N ) within the adapted angular range (AR). Still further, the system comprises a segmentator ( 30 ), which is configured to generate a segmentation model based on the acquired images (I 1 , . . . , I N ) using the determined segmentation parameter (SP).

First claim

The invention claimed is:

1. A medical imaging system comprising:
a C-arm imaging device comprising a C-arm, the C-arm imaging device being configured to acquire X-ray images (I 1 , . . . , I N ) over an angular range;
a configurator circuit configured to determine: i) an adapted angular range in accordance with an operation mode of the medical imaging system, the adapted angular range being adapted with respect to a full angular range of the C-arm; and ii) a segmentation parameter directly based on the adapted angular range; and
a segmentator circuit configured to generate a segmentation model based on the acquired X-ray images (I 1 , . . . , I N ) using the determined segmentation parameter.

2. The medical imaging system according to claim 1 ,
further comprising a configurable user interface, which is configured to selectively display functionality used for controlling the medical imaging system based on the adapted angular range.

3. The medical imaging system according to claim 1 ,
further comprising an image analyzer circuit configured to identify a landmark on the acquired X-ray images (I 1 , . . . , I N ) based on the generated segmentation model.

4. The medical imaging system according to claim 1 , further comprising an image analyzer circuit configured to perform a measurement on the acquired X-ray images (I 1 , . . . , I N ) based on the generated segmentation model.

5. The medical imaging system according to claim 1 ,
wherein the configurator circuit is configured to determine an imaging parameter with respect to an operation mode of the medical imaging system.

6. The medical imaging system according to claim 5 ,
wherein the configurator circuit is configured to determine the imaging parameter in form of an X-ray voltage used by the C-arm imaging device to acquire the X-ray images (I 1 , . . . , I N ); or in form of an acquisition speed used by the C-arm imaging device; or in form of a determined quantity of the acquired X-ray images (I 1 , . . . , I N ) used by the imaging device.

7. The medical imaging system according to claim 5 ,
wherein the configurator circuit is configured to determine:
the adapted angular range or the imaging parameter with respect to
a treatment planning mode; or to
a pre-interventional examination mode; or to
an intra-interventional examination mode; or to
a post-interventional examination mode

as the operation mode of the medical imaging system.

8. The medical imaging system according to claim 7 ,
wherein the configurator circuit is configured to determine the adapted angular range to up to 180°, or to up to 140°, or to up to 110°, or to up to 90°.

9. The medical imaging system according to claim 7 ,
wherein the segmentator circuit is configured to generate the segmentation model with respect to the adapted angular range.

10. The medical imaging system according to claim 1 , further comprising a display device configured to display the generated segmentation model.

11. A method for adaptive segmentation, the method comprising:
a) determining, with respect to a full angular range of a C-arm imaging device, an adapted angular range in accordance with an operation mode of an X-ray imaging system and determining a segmentation parameter directly based on the adapted angular range by a configurator;
b) acquiring images (I 1 , . . . , I N ) within the adapted angular range by the C-arm imaging device; and
c) generating a segmentation model based on the acquired X-ray images (I 1 , . . . , I N ) using the determined segmentation parameter by a segmentator.

12. The method according to claim 11 ,
further comprising altering, enabling, or disabling functionality in a user interface based on the adapted angular range by an interface configurator.

13. The method according to claim 11 ,
further comprising identifying a landmark on the acquired images based on the generated segmentation model by an image analyzer.

14. The method according to claim 11 ,
further comprising performing a photogrammetric measurement on the acquired X-ray images (I 1 , . . . , I N ) based on the generated segmentation model.

15. The method according to claim 11 ,
further comprising determining an imaging parameter with respect to an operation mode of the X-ray imaging system by the configurator.

Assignees

• Koninklijke Philips Nv

Inventors

• Saalbach Axel
• Eshuis Pieter Gerben
• Van Den Boomen Wilhelmus Henrica Gerarda Maria
• Schäfer Dirk
• Weese Juergen

Classifications

• G06T2207/30004

  Biomedical image processing · CPC title

• A61B6/5258

  involving detection or reduction of artifacts or noise · CPC title

• A61B6/504

  for diagnosis of blood vessels, e.g. by angiography · CPC title

• G06T2207/10116

  X-ray image · CPC title

• G06T7/10 Primary

  Segmentation; Edge detection (motion-based segmentation G06T7/215) · CPC title