The effect of threshold level on bone segmentation of cranial base structures from CT and CBCT images.

ABSTRACT: The use of a single grey intensity threshold is one of the most straightforward and widely used methods to segment cranial base surface models from a 3D radiographic volume. In this study we used thirty Cone Beam Computer Tomography (CBCT) scans from three different machines and ten CT scans of growing individuals to test the effect of thresholding on the subsequently produced anterior cranial base surface models. From each scan, six surface models were generated using a range of voxel intensity thresholds. The models were then superimposed on a manually selected reference surface model, using an iterative closest point algorithm. Multivariate tests showed significant effects of the machine type, threshold value, and superimposition on the spatial position and the form of the created model

SUBMITTER: Friedli L 

PROVIDER: S-EPMC7193643 | biostudies-literature | 2020 Apr

REPOSITORIES: biostudies-literature