Methodologies for Development of Patient Specific

Authors: Vikas Narayan Chougule Arati Vinayak Mulay Bharatkumar Bhagatraj Ahuja

Publish Date: 2016/06/22

Volume: 99, Issue: 4, Pages: 413-418

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Abstract

This work deals with development of algorithm for physical replication of patient specific human bone and construction of corresponding implants/inserts RP models by using Reverse Engineering approach from noninvasive medical images for surgical purpose In medical field the volumetric data ie voxel and triangular facet based models are primarily used for biomodelling and visualization which requires huge memory space On the other side recent advances in Computer Aided Design CAD technology provides additional facilities/functions for design prototyping and manufacturing of any object having freeform surfaces based on boundary representation techniques This work presents a process to physical replication of 3D rapid prototyping RP physical models of human bone from various CAD modeling techniques developed by using 3D point cloud data which is obtained from noninvasive CT/MRI scans in DICOM 30 format This point cloud data is used for construction of 3D CAD model by fitting Bspline curves through these points and then fitting surface between these curve networks by using swept blend techniques This process also can be achieved by generating the triangular mesh directly from 3D point cloud data without developing any surface model using any commercial CAD software The generated STL file from 3D point cloud data is used as a basic input for RP process The Delaunay tetrahedralization approach is used to process the 3D point cloud data to obtain STL file CT scan data of Metacarpus human bone is used as the case study for the generation of the 3D RP model A 3D physical model of the human bone is generated on rapid prototyping machine and its virtual reality model is presented for visualization The generated CAD model by different techniques is compared for the accuracy and reliability The results of this research work are assessed for clinical reliability in replication of human bone in medical fieldThis research is supported by Rajiv Gandhi Science and Technology Commission Scheme—Biomedical Engineering and Technology incubation Centre BETiC Project The authors would like to thank B K L Walawalkar Hospital Ratnagiri India for providing CT scans and valuable information regarding human anatomy and surgical processes

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