Femur Bone

Last crawled date: 1 year, 10 months ago

Femur Bone
Prepared by Digital Imaging (DI) (CMM Optical) and CT Scan (CT Imaging)
Human specimen’s properties for this Femur bone are: Male, Left leg, Age 44, Death 2016, Weigh 85 (kg), Height 185 (cm) (original scale)

Femur bone was created in 3D using Digital Imaging (DI) (CMM Optical 2015, Made by GOM Co., Germany). Digitized model was first modeled as Shell and cloud points, i.e. STEP format, in CATIA V5/R21 and then was surfaced as a Solid. The inner area of the Femur (the central cavity and inner layer) cannot be modeled and surfaced using this method. So to model this section (which is one of the most important parts in FE model), Computed Tomography (CT) scan method is used (Only the Cortical bone tissue is modeled using this approach and Trabecular tissue is not modeled). In this way, the bone is completely and precisely modeled. In this type of imaging, first, all the bone is scanned and then sections with a space of 10mm of each other and with an exact coordinates from the top of Femur bone (Proximal region) to the end part (Distal region) of the bone is created using the related software. All sections are stored in two-dimensional and with Digital Imaging and Communication in Medicine (DICOM) format (Using Marco PACS and SECTRA PACS or Sonic PACS software and DICOM files, all the sections, i.e. 25 sections in diaphysis region with a distance of 10mm and almost 45 sections in throughout of bone), the output format of CT scanner, and visualized in Photoshop CC. Finally, the three-dimensional model of the original bone along with 2D images of cross sections of CT scan separately with the desired scaling transferred into Solid Works 2013 and each cross section corresponded to the outer boundaries of the same cross section in 3D models so that its central hole were determined in separate plans as sketched. Similarly, all the cross sections were modeled and in the end, using the lofted cut modules (removed) option all the sketches emptied from the original bone volume. This method is accurate to 0.01mm.