Data processing method of panoramagram generated by dental CBCT (cone beam computed tomography)

A technology of data processing and panorama, which is applied in the fields of dental clinical medicine and computer graphics, and can solve problems such as cumbersome operations

Active Publication Date: 2012-07-25
LARGEV INSTR CORP LTD
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  • Application Information

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Problems solved by technology

The first step of initializing the curve has to be done again, making the operation even more cumbersome

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  • Data processing method of panoramagram generated by dental CBCT (cone beam computed tomography)
  • Data processing method of panoramagram generated by dental CBCT (cone beam computed tomography)
  • Data processing method of panoramagram generated by dental CBCT (cone beam computed tomography)

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specific Embodiment approach

[0042] 1. Firstly, the three-dimensional image data of the whole mouth teeth are obtained from the digital tomography equipment of the oral cavity. These data are composed of a series offigure 1 Axial images are shown stacked perpendicular to the paper, and the data can include only the upper dentition, only the lower dentition, or both. If only the 3D data of the upper dentition is obtained, a half panorama containing only the upper dentition will be generated; if only the 3D data of the lower dentition is obtained, a half panorama containing only the lower dentition will be generated; Three-dimensional data will generate a full panorama that includes both the upper and lower dentition.

[0043] 2. Initialize a dental arch curve, denoted as C0 curve, and use it as the starting point of contraction or expansion. The contracted or expanded curve will be used as the dental arch curve when expanding the panorama. The method of curve initialization is as follows: firstly, one of t...

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Abstract

The invention discloses a data processing method of a panoramagram generated by a dental CBCT (cone beam computed tomography), comprising the steps of obtaining three-dimensional image data of full denture from oral digital tomography equipment; initializing a dental arch curve as a starting point of contraction or expansion; taking the contracted or extended curve as a dental arch curve used when expanding the panoramagram; obtaining a coordinate of each point on the curve, computing the normal direction of each point on the curve and setting the distance of the curve contracting inwards or expanding outwards; moving each point on the curve in the outer normal direction or inner normal direction of the point with a distance d; computing the distance of one point on a new curve to all points on the original curve; according to a distance threshold, performing screening; generating a final curve by all non-abandoned points on the new curve; and splicing multiple columns of data obtained by the final curve together in sequence to generate a corresponding panoramagram.

Description

technical field [0001] The method of the present invention belongs to the field of oral clinical medicine and computer graphics, and in particular relates to a data processing method for generating panoramic images by dental CBCT. Background technique [0002] The three-dimensional data collected by digital tomography equipment used in dentistry (also known as cone beam computed tomography equipment, English abbreviation CBCT) can be regarded as a series of axial plane images (see attached figure 1 ), stacked along the direction perpendicular to the paper. The traditional panorama function can produce a two-dimensional panorama of the whole mouth. The digital tomography equipment used in dentistry cannot directly obtain a two-dimensional panorama, but can use the collected three-dimensional data to reconstruct a two-dimensional dental panorama. The panorama is also called a curved tomogram, which can be viewed as unfolding all the teeth along the curved direction of the den...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06T11/00
Inventor 吴宏新马晓昕
Owner LARGEV INSTR CORP LTD
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