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Method and apparatus for automatic local path planning for virtual colonoscopy

A technology for local path planning and colonoscopy, which is applied in image enhancement, instrumentation, calculation, etc., and can solve problems such as failure and time-consuming

Inactive Publication Date: 2006-03-08
SIEMENS MEDICAL SOLUTIONS USA INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this technique requires segmentation and orbit calculation steps, which are time consuming and may fail

Method used

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  • Method and apparatus for automatic local path planning for virtual colonoscopy
  • Method and apparatus for automatic local path planning for virtual colonoscopy
  • Method and apparatus for automatic local path planning for virtual colonoscopy

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Embodiment Construction

[0030] It is understood that the methods and systems of the present invention are implemented using programmable digital computers, and that the operations described herein relate to such implementations. In relation to imaging, terms such as "air", "lumen", etc. typically refer to the corresponding imaging of these properties.

[0031] As noted above, in some cases, the operation of the prior art virtual colonoscopy system may get stuck in a sharp bend or aspirator fold, as may occur during a virtual colonoscopy. figure 1 A typical situation when the endoscope is caught in a sharp bend is shown.

[0032] According to an embodiment of the invention, region growth from the endoscope position intersects the cube in three clusters c0, cl and c2. The system calculates new centerlines from the endoscope to the center of each cluster and compares each path to the endoscope's path. Compute a score reflecting the masking of the path with the new path. The path with the highest scor...

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Abstract

A method for automatic local path planning for a virtual endoscope comprises the steps of defining a sub volume around a current endoscope position in a lumen; performing a region growing inside the lumen, starting from the current endoscope position; calculating and clustering the intersection of the region with the faces of a cube circumscribing the sub volume; calculating approximated centerline paths from the current endoscope position to the center of each cluster formed in the preceding step; comparing each of the centerline paths with a current path exhibited by the endoscope; and selecting an optimal centerline path based on the comparison.

Description

[0001] Cross References to Related Applications [0002] priority [0003] Reference is made herein to co-pending U.S. Provisional Patent Application No. 60 / 443,734, filed with the U.S. Patent and Trademark Office by inventor Bernhard Geiger on January 30, 2003, entitled AUTOMATIC LOCAL PATH PLANNING FORVIRTUAL CONLONOSCOPY, which is hereby incorporated by reference Its publication, and its priority is claimed. [0004] Reference is also made herein to co-pending U.S. Provisional Patent Application No. 60 / 470,579, filed May 14, 2003, by inventors Bernhard Geiger and Jean Daniel Boissonnat in the U.S. Patent and Trademark Office, entitled FAST CENTERLINE EXTRACTION, wherein here The disclosure thereof is incorporated by reference, and the priority of which is claimed. [0005] The present application relates generally to computer vision and imaging systems, and more particularly to systems and methods for automatic local path planning, such as may be used for virtual endoscopy ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T5/30
Inventor B·盖格
Owner SIEMENS MEDICAL SOLUTIONS USA INC
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