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首页> 外文期刊>Computer Methods and Programs in Biomedicine: An International Journal Devoted to the Development, Implementation and Exchange of Computing Methodology and Software Systems in Biomedical Research and Medical Practice >Computer-based extraction of the inferior alveolar nerve canal in 3-D space.
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Computer-based extraction of the inferior alveolar nerve canal in 3-D space.

机译：基于计算机的3-D空间中下牙槽神经管的提取。

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摘要

Computed tomography (CT) is increasingly employed in orthodontic treatment. One of the most successful applications is in dental implantology, in which an artificial root is surgically inserted into the jawbone to provide anchorage for a dental prosthesis. For successful implant surgery, it is crucial to locate internal structures such as the inferior alveolar nerve canal (IAC). This paper presents a computerized technique for extracting the IAC. To facilitate the extraction, we first generate panoramic CT images (panoramics) by reformatting the original CT images. The panoramics are a series of cross-sectional images along curved planes through the mandible (lower jawbone). Hollow canals are subsequently detected by analyzing the voxel intensities and 3-D gradient orientations in the panoramics. The axis of the IAC is then traced out by a novel 3-D line-tracking technique. The method is effective for extracting the IAC despite the open structure of the surrounding bone.
机译：正畸治疗中越来越多地使用计算机断层扫描（CT）。最成功的应用之一是在牙种植学中，其中通过外科手术将人造牙根插入颚骨中，以为假牙提供锚固。对于成功的植入手术，至关重要的是定位内部结构，例如下牙槽神经管（IAC）。本文提出了一种用于提取IAC的计算机化技术。为了便于提取，我们首先通过重新格式化原始CT图像来生成全景CT图像（全景）。全景图是沿着下颌骨（下颌骨）弯曲平面的一系列横截面图像。随后通过分析全景图中的体素强度和3-D梯度方向来检测空心运河。然后，通过新颖的3D线跟踪技术来跟踪IAC的轴。尽管周围骨骼的结构开放，该方法仍可有效地提取IAC。

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