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Date of Publication:2010-01-01

Journal:高技术通讯

Affiliation of Author(s):国际信息与软件学院

Issue:5

Page Number:511-517

ISSN No.:1002-0470

Abstract:The paper proposes a novel simulation method of obtaining the geometric parameters of a target fixation plate before the long bone fracture operation. Its main processing scheme consists of the following steps: First, Curvelet transform is utilized to denoise CT images of the fracture part and 3-D models are reconstructed; Second, axial lines of fractured bones are extracted and spatially aligned, and also the fractured bone models are driven to pre-register; Third, a method based on vertex normal feature is utilized to obtain the fractured bone sections; Fourth, a method based on the non-iterative estimation is used to align sections and to drive the fractured bone models to close register; Finally, an accurate NURBS surface fitting method is used to fit the plate, and the geometric parameters are measured. Humeral fracture and fibular fracture are chosen as the experimental subjects. The method proposed is proved effective in precise construction of the prebent plate model, which would shorten the operating time and improve the quality.

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