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http://hdl.handle.net/10397/62030
Title: | Freehand three-dimensional ultrasound system for assessment of scoliosis | Authors: | Cheung, CWJ Zhou, GQ Law, SY Lai, KL Jiang, WW Zheng, YP |
Issue Date: | 2015 | Source: | Journal of orthopaedic translation, 2015, v. 3, no. 3, p. 123-133 | Abstract: | Background/Objective: Standing radiograph with Cobb's method is routinely used to diagnose scoliosis, a medical condition defined as a lateral spine curvature > 10° with concordant vertebral rotation. However, radiation hazard and two-dimensional (2-D) viewing of 3-D anatomy restrict the application of radiograph in scoliosis examination. Methods: In this study, a freehand 3-D ultrasound system was developed for the radiation-free assessment of scoliosis. Bony landmarks of the spine were manually extracted from a series of ultrasound images with their spatial information recorded to form a 3-D spine model for measuring its curvature. To validate its feasibility, invivo measurements were conducted in 28 volunteers (age: 28.0±13.0 years, 9 males and 19 females). A significant linear correlation (R2=0.86; p<0.001) was found between the spine curvatures as measured by Cobb's method and the 3-D ultrasound imaging with transverse process and superior articular process as landmarks. The intra- and interobserver tests indicated that the proposed method is repeatable. Results: The 3-D ultrasound method using bony landmarks tended to underestimate the deformity, and a proper scaling is required. Nevertheless, this study demonstrated the feasibility of the freehand 3-D ultrasound system to assess scoliosis in the standing posture with the proposed methods and 3-D spine profile. Conclusion: Further studies are required to understand the variations that exist between the ultrasound and radiograph results with a larger number of volunteers, and to demonstrate its potential clinical applications for monitoring of scoliosis patients. Through further clinical trials and development, the reported 3-D ultrasound imaging system can potentially be used for scoliosis mass screening and frequent monitoring of progress and treatment outcome because of its radiation-free and easy accessibility feature. |
Keywords: | Cobb angle Freehand 3-D ultrasound Scoliosis Spine deformity |
Publisher: | Elsevier | Journal: | Journal of orthopaedic translation | ISSN: | 2214-031X | DOI: | 10.1016/j.jot.2015.06.001 | Rights: | Copyright © 2015, The Authors. Published by Elsevier (Singapore) Pte Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). The following publication Cheung, C. W. J., Zhou, G. Q., Law, S. Y., Lai, K. L., Jiang, W. W., & Zheng, Y. P. (2015). Freehand three-dimensional ultrasound system for assessment of scoliosis. Journal of Orthopaedic Translation, 3(3), 123-133 is available at https://doi.org/10.1016/j.jot.2015.06.001 |
Appears in Collections: | Journal/Magazine Article |
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Cheung_Freehand_three-dimensional.pdf | 2.2 MB | Adobe PDF | View/Open |
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