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Volume rendering using surface guided cropping

A volume-rendering, volume-based technology applied to diagnostic radiology instruments, applications, dental prostheses, etc., to achieve superior results

Active Publication Date: 2020-04-17
3SHAPE AS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, often clipping planes or simple bounding boxes do not provide a sufficiently detailed selection of 3D volume data in relation to selected parts, especially for occluded objects with intervening parts

Method used

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  • Volume rendering using surface guided cropping
  • Volume rendering using surface guided cropping
  • Volume rendering using surface guided cropping

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Embodiment Construction

[0053] In the following description, reference is made to the accompanying drawings, which show by way of illustration how the disclosure may be practiced.

[0054] figure 1 A 2D projection of 3D volume data recorded from a patient by a computed tomography (CT) X-ray scan is shown according to an embodiment. Computed tomography, especially X-ray computed tomography, is a widely used volumetric imaging principle. Generally, the radiation source and the radiation-sensitive image sensor are arranged in a line with the examination subject in between. Subject attenuates radiation. The source-detector arrangement is usually moved to several positions around the examination subject, usually on a circle or a segment thereof, and images are taken at each position. A 3D volumetric dataset representing the spatial, volumetric distribution of the attenuation coefficients within the subject can then be generated from the recorded images. CT scans of patient groups of teeth are often us...

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Abstract

Disclosed is surface guided cropping in volume rendering of 3D volumetric data from intervening anatomical structures in the patient's body. A digital 3D representation expressing the topography of afirst anatomical structure is used to define a clipping surface or a bounding volume which then is used in the volume rendering to exclude data from an intervening structure when generating a 2D projection of the first anatomical structure.

Description

technical field [0001] The present disclosure generally relates to the use of surface information for clipping out unnecessary or unimportant data in volume rendering of 3D volume data, such as computed tomography (CT) data. The present disclosure has application in various fields of medicine, for example in dentistry. Background technique [0002] Volume rendering of 3D volumetric data can generate a 2D projection of an object as it would appear from a given viewpoint relative to the object being scanned. For each different viewpoint, a new 2D projection is generated. When volume rendering should only select 3D volume data related to a specific anatomy, clipping planes and / or bounding boxes can be used to exclude parts of the 3D volume data related to other anatomical structures. A clipping plane enclosing the 3D volume data that should be included in the volume rendering is then defined such that objects lying outside the clipping plane are not visible in the resulting 2...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61C13/00A61B6/00A61B6/51
CPCA61C9/0046A61B6/5235A61C13/0004A61B6/032A61B6/466A61B6/505A61B6/51A61B6/5223G06T15/08A61B6/5247G06T15/06G06T17/00
Inventor A·克亚尔-尼尔森A·C·斯图特
Owner 3SHAPE AS