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Title: | Computer-based automatic classification of trabecular bone pattern can assist radiographic bone quality assessment at dental implant site | Authors: | Nicolielo, Laura Ferreira Pinheiro Van Dessel, Jeroen Van Lenthe, G. Harry LAMBRICHTS, Ivo Jacobs, Reinhilde |
Issue Date: | 2018 | Publisher: | BRITISH INST RADIOLOGY | Source: | BRITISH JOURNAL OF RADIOLOGY, 91(1092) (Art N° 20180437) | Abstract: | Objective: To develop and validate an automated classification method that determines the trabecular bone pattern at implant site based on three-dimensional bone morphometric parameters derived from CBCT images. Methods: 25 human cadaver mandibles were scanned using CBCT clinical scanning protocol. Volumes-ofinterest comprising only the trabecular bone of the posterior regions were selected and segmented for three-dimensional morphometric parameters calculation. Three experts rated all bone regions into one of the three trabecular pattern classes (sparse, intermediate and dense) to generate a reference classification. Morphometric parameters were used to automatically classify the trabecular pattern with linear discriminant analysis statistical model. The discriminatory power of each morphometric parameter for automatic classification was indicated and the accuracy compared to the reference classification. Repeated-measures analysis of variances were used to statistically compare morphometric indices between the three classes. Finally, the outcome of the automatic classification was evaluated against a subjective classification performed independently by four different observers. Results: The overall correct classification was 83% for quantity-, 86% for structure-related parameters and 84% for the parameters combined. Cross-validation showed a 79% model prediction accuracy. Bone volume fraction (BV/TV) had the most discriminatory power in the automatic classification. Trabecular bone patterns could be distinguished based on most morphometric parameters, except for trabecular thickness (Tb.Th) and degree of anisotropy (DA). The interobserver agreement between the subjective observers was fair (0.25), while the test-retest agreement was moderate (0.46). In comparison with the reference standard, the overall agreement was moderate (0.44). Conclusion: Automatic classification performed better than subjective classification with a prediction model comprising structure- and quantity-related morphometric parameters. Advances in knowledge: Computer-aided trabecular bone pattern assessment based on morphometric parameters could assist objectivity in clinical bone quality classification. | Notes: | [Nicolielo, Laura Ferreira Pinheiro; Van Dessel, Jeroen; Jacobs, Reinhilde] Katholieke Univ Leuven, Dept Imaging & Pathol, OMFS IMPATH Res Grp, Leuven, Belgium. [Nicolielo, Laura Ferreira Pinheiro; Van Dessel, Jeroen; Jacobs, Reinhilde] Univ Hosp Leuven, Oral & Maxillofacial Surg, Leuven, Belgium. [Van Lenthe, G. Harry] Dept Mech Engn, Biomech Sect, Leuven, Belgium. [Lambrichts, Ivo] Hasselt Univ, Biomed Res Inst, Morphol Grp, Diepenbeek, Belgium. [Jacobs, Reinhilde] Karolinska Inst, Dept Dent Med, Huddinge, Sweden. | Document URI: | http://hdl.handle.net/1942/28611 | ISSN: | 0007-1285 | e-ISSN: | 1748-880X | DOI: | 10.1259/bjr.20180437 | ISI #: | 000450768700017 | Rights: | 2018 The Authors. Published by the British Institute of Radiology | Category: | A1 | Type: | Journal Contribution | Validations: | ecoom 2019 |
Appears in Collections: | Research publications |
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