Long bones reconstruction using 3D ultrasound imaging system

Karlita, Tita (2020) Long bones reconstruction using 3D ultrasound imaging system. Doctoral thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Understanding the dimension and shape of a long bone is an essential aspect of many related fields. Currently, the primary modalities used for imaging bone are X-Ray and Computed Tomography (CT) since they can clearly show bony structures. Nevertheless, using X-Ray and CT involves radiation exposures. Hence, their usages are limited and ethically only for medical treatments. On the other hand, a large number of bone information from various individual characteristics is required. Therefore, a safe bone imaging technique for mass screening of healthy human volunteers is required. Ultrasound is often used for imaging the internal human body since it is non-invasive, no radiation exposure, cost-effective, and provides real-time images. The major drawback of ultrasound is that it is in two-dimensional (2D); it has low contrast and low image quality. Moreover, ultrasound lacks in determining quantitative and accurate 3D information since it has limitations in providing spatial data and precise dimension measurement. Therefore, it brings difficulty for obtaining the shape, dimension, and geometry of the bone in 3D space. The objective of this study is to reconstruct long bone using 3D ultrasound imaging systems. First, 3D ultrasound imaging systems are designed and developed using two approaches, i.e., the motorized mechanical linear tracking and the freehand with an optical position sensor. They allow us to acquire a sequence of bone ultrasound images, along with their 3D spatial coordinates. Second, the bone outer contour is extracted by first segmenting the bone using the combination of Region Proposal Networks and region-based curve approximation. Then, the outer bone surface is reconstructed by arranging a set of bone outer contours according to their spatial coordinates in 3D space. Finally, the bone shape can be visualized in 3D, and its dimension and geometry can be informed. In results, the mean absolute error of partial and full bone length of long bone reconstruction using the mechanical linear 3D ultrasound imaging system is 1.17 mm (0.55%), and 2.58 mm (1.22%), respectively. The mean absolute error of full bone width and full bone length of long bone reconstruction using the optical freehand are 1.66 mm (0.79%), and 2.79 mm (5.94%), respectively. These results show that the proposed 3D ultrasound imaging systems, together with bone outer contour extraction, can generate a high-quality long bone outer surface. These results also highlight the feasibility of the systems as a potential technique to safely scan bone for mass screening and create 3D bone models along with accurate dimensions and geometry.

Item Type:	Thesis (Doctoral)
Additional Information:	RDE 006.42 Kar r-1
Uncontrolled Keywords:	3D ultrasound imaging system, bone segmentation, mechanical linear, optical freehand, long bone reconstruction.
Subjects:	A General Works > AC Collections. Series. Collected works A General Works > AC Collections. Series. Collected works Q Science > Q Science (General) Q Science > Q Science (General) > Q180.55.M38 Mathematical models T Technology > T Technology (General)
Divisions:	Faculty of Electrical Technology > Electrical Engineering > 20001-(S3) PhD Thesis
Depositing User:	Tita Karlita
Date Deposited:	14 Mar 2025 03:42
Last Modified:	14 Mar 2025 03:42
URI:	http://repository.its.ac.id/id/eprint/75242

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