NAVIGATING AN INTERVENTIONAL DEVICE

• US 20130101196A1
• Filed: 01/04/2011
• Published: 04/25/2013
• Est. Priority Date: 01/12/2010
• Status: Active Grant

• Current Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Original Assignee: Koninklijke Philips Electronics N.V. (Koninklijke Philips N.V.)
• Inventors: Florent, Raoul, Van Rens, Bram Antonius Philomena, Schooenenberg, Gert Antonius Franciscus
• Granted Patent: US 8,942,457 B2
• Time in Patent Office: Days
• US Class Current: 382/131
• CPC Class Codes: A61B 6/52 Devices using data or image processing specially adapted for radiation diagnosis
• CPC Class Codes: G06T 11/003 Reconstruction from projections, e.g. tomography
• CPC Class Codes: G06T 11/008 Specific post-processing after tomographic reconstruction, e.g. voxelisation, metal artifact correction
• CPC Class Codes: G06T 2207/10072 Tomographic images
• CPC Class Codes: G06T 2207/10121 Fluoroscopy
• CPC Class Codes: G06T 2207/30101 Blood vessel; Artery; Vein; Vascular
• CPC Class Codes: G06T 2211/404 Angiography
• CPC Class Codes: G06T 2211/428 Real-time
• CPC Class Codes: G06T 7/30 Determination of transform parameters for the alignment of images, i.e. image registration
• CPC Class Codes: Y10S 128/922 including image analysis

Abstract

The present invention relates to navigating an interventional device. In particular, the invention relates to a system for navigating an interventional device within a tubular structure of an object, a method for navigating an interventional device within a tubular structure of an object as well as a computer program element and a computer-readable medium. In order to provide enhanced information to the user in an easily comprehensible manner while keeping the X-ray dose to a minimum, a system and a method for navigating an interventional device within a tubular structure of an object are provided, wherein the method comprised the following steps: a) Acquiring 2D X-ray fluoroscopy image data in one projection geometry of a region of interest of the tubular structure; b) detecting the interventional device in the 2D X-ray image; c) determining the 2D position of the interventional device in the 2D X-ray image; d) registering the at least one 2D X-ray image with a previously acquired 3D dataset of the region of interest of the tubular structure; e) mapping the determined 2D position of the interventional device to a position in the 3D dataset; f) extracting local 3D parameters of the tubular structure at the position of the interventional device; g) generating navigational information on behalf of the determined 3D position of the interventional device and the extracted local 3D parameters; and h) providing the navigational information to the user.

Claims

1. A system (10) for navigating an interventional device (12) within a tubular structure of an object (13);

comprising;

an X-ray image acquisition device (16);

a processing unit (24); and

an interface (28);

wherein the X-ray image acquisition device (16) is adapted to acquire 2D X-ray fluoroscopy image data in one projection geometry of a region of interest of the tubular structure;

wherein the processing unit (24) is adapted to detect the interventional device (12) in the 2D X-ray image;

to determine the 2D position of the interventional device (12) in the 2D X-ray image;

to register the at least one 2D X-ray image with a previously acquired 3D dataset of the region of interest of the tubular structure;

to map the determined 2D position of the interventional device to a position in the 3D dataset;

to extract local 3D parameters of the tubular structure at the position of the interventional device; and

to generate navigational information on behalf of the determined 3D position of the interventional device (12) and the extracted local 3D parameters;

wherein the interface (28) is adapted to provide the navigational information to the user.

2. The system according to claim 1, wherein the processing unit (24) is adapted to convert the navigational information into graphical advisory information;

to adapt acquired image data of the region of interest on behalf of the navigational information; and

a display (32) is provided to display the adapted image data to the user.

3. The system according to claim 1, wherein the processing unit (24) is adapted to determine the orientation of the surrounding tubular structure;

and to determine the orientation of the interventional device (12) in relation to the surrounding tubular structure; and

wherein the display (32) is adapted to display an orientation indicator.

4. The system according to claim 1, wherein the processing unit (24) is adapted to identify optimal viewing direction for the segment of the tubular structure surrounding the interventional device (12);

to determine a deviation factor of current viewing direction of the X-ray imaging device (16) in relation to the optimal viewing direction; and

to determine a movement factor for optimal viewing; and

wherein the X-ray image acquisition device (16) is adapted to be moved in relation to the object for optimal viewing.

12. Computer program element for controlling a system according to claim 1.

13. Computer readable medium having stored the program element of claim 12.

5. A method for navigating an interventional device (12) within a tubular structure of an object, comprising the following steps:

a) acquiring (112) 2D X-ray fluoroscopy image data (113) in one projection geometry of a region of interest of the tubular structure;

b) detecting (114) the interventional device (12) in the 2D X-ray image;

c) determining (116) the 2D position of the interventional device in the 2D X-ray image;

d) registering (118) the at least one 2D X-ray image with a previously acquired (120) 3D dataset (121) of the region of interest of the tubular structure;

e) mapping (122) the determined 2D position of the interventional device to a position in the 3D dataset (121);

f) extracting (124) local 3D parameters (125) of the tubular structure at the position of the interventional device (12);

g) generating (126) navigational information (127) on behalf of the determined 3D position of the interventional device (12) and the extracted local 3D parameters (125); and

h) providing (128) the navigational information (127) to the user.

6. The method according to claim 5, wherein step e) comprises computing (130) probabilities for different segments of the tubular structure;

and maximizing (132) accumulated probability from the different probabilities to determine (134) in which segment of the tubular structure the interventional device (12) may be located;

wherein on behalf of the accumulated probability information is gathered (136) in space from the 3D dataset.

7. The method according to claim 5, wherein before step h), the navigational information is converted (138) into graphical advisory information (140) and wherein step h) comprises adapting (142) acquired image data of the region of interest on behalf of the navigational information and displaying (144) the adapted image data to the user.

8. The method according to claim 5, wherein the 2D X-ray image data is transformed into enhanced 2D image data (143a) by superimposing the graphical advisory information (140) with the 2D X-ray image data (113);

and wherein the enhanced 2D image data (143a) is displayed (144) to the user.

9. The method according to claim 5, wherein 3D image data is generated from the previously acquired 3D dataset (121) and wherein the 3D image data is transformed into enhanced 3D image data (143b) by integrating the graphical advisory information (140);

and wherein the enhanced 3D image data (143b) is displayed (144) to the user.

10. The method according to claim 5, wherein step f) comprises determining (148) the orientation of the surrounding tubular structure;

wherein step g) comprises determining (150) the orientation of the device in relation to the surrounding tubular structure; and

wherein step h) comprises displaying (152) an orientation indicator (154).

11. The method according to claim 5, wherein step g) comprises identifying (156) optimal viewing direction (158) for the segment of the tubular structure surrounding the interventional device;

determining (160) a deviation factor (162) of current viewing direction of the X-ray imaging device in relation to the optimal viewing direction; and

determining (164) a movement factor (166) for optimal viewing; and

wherein step h) comprises moving (168) the X-ray imaging device (16) in relation to the object for optimal viewing.