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Methodologies for Development of Patient Specific Bone Models from Human Body CT Scans

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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 non-invasive medical images for surgical purpose. In medical field, the volumetric data i.e. voxel and triangular facet based models are primarily used for bio-modelling 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 non-invasive CT/MRI scans in DICOM 3.0 format. This point cloud data is used for construction of 3D CAD model by fitting B-spline 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 field.

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Acknowledgement

This 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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Authors and Affiliations

  1. Department of Production Engineering, College of Engineering, Pune, 411005, Maharashtra, India

    Vikas Narayan Chougule & Arati Vinayak Mulay

  2. College of Engineering, Pune, 411005, Maharashtra, India

    Bharatkumar Bhagatraj Ahuja

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  1. Vikas Narayan Chougule
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  2. Arati Vinayak Mulay
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  3. Bharatkumar Bhagatraj Ahuja
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Correspondence to Vikas Narayan Chougule.

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Chougule, V.N., Mulay, A.V. & Ahuja, B.B. Methodologies for Development of Patient Specific Bone Models from Human Body CT Scans. J. Inst. Eng. India Ser. C 99, 413–418 (2018). https://doi.org/10.1007/s40032-016-0301-6

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  • DOI: https://doi.org/10.1007/s40032-016-0301-6

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