A computerized scheme for localization of vertebral bodies on body CT scans

Tatsuro Hayashi; Huayue Chen; Kei Miyamoto; Xiangrong Zhou; Takeshi Hara; Ryujiro Yokoyama; Masayuki Kanematsu; Hiroaki Hoshi; Hiroshi Fujita

doi:10.1117/12.877511

14 March 2011 A computerized scheme for localization of vertebral bodies on body CT scans

Tatsuro Hayashi, Huayue Chen, Kei Miyamoto, Xiangrong Zhou, Takeshi Hara, Ryujiro Yokoyama, Masayuki Kanematsu, Hiroaki Hoshi, Hiroshi Fujita

Author Affiliations +

Proceedings Volume 7962, Medical Imaging 2011: Image Processing; 796238 (2011) https://doi.org/10.1117/12.877511
Event: SPIE Medical Imaging, 2011, Lake Buena Vista (Orlando), Florida, United States

Abstract

The multidetector row computed tomography (MDCT) method has the potential to be used for quantitative analysis of osteoporosis with higher accuracy and precision than that provided by conventional two-dimensional methods. It is desirable to develop a computer-assisted scheme for analyzing vertebral geometry using body CT images. The aim of this study was to design a computerized scheme for the localization of vertebral bodies on body CT images. Our new scheme involves the following steps: (i) Re-formation of CT images on the basis of the center line of the spinal canal to visually remove the spinal curvature, (ii) use of information on the position of the ribs relative to the vertebral bodies, (iii) the construction of a simple model on the basis of the contour of the vertebral bodies on CT sections, and (iv) the localization of individual vertebral bodies by using a template matching technique. The proposed scheme was applied to 104 CT cases, and its performance was assessed using the Hausdorff distance. The average Hausdorff distance of T2-L5 was 4.3 mm when learning models with 100 samples were used. On the other hand, the average Hausdorff distance with 10 samples was 5.1 mm. The results of our assessments confirmed that the proposed scheme could provide the location of individual vertebral bodies. Therefore, the proposed scheme may be useful in designing a computer-based application that analyzes vertebral geometry on body CT images.

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Tatsuro Hayashi, Huayue Chen, Kei Miyamoto, Xiangrong Zhou, Takeshi Hara, Ryujiro Yokoyama, Masayuki Kanematsu, Hiroaki Hoshi, and Hiroshi Fujita "A computerized scheme for localization of vertebral bodies on body CT scans", Proc. SPIE 7962, Medical Imaging 2011: Image Processing, 796238 (14 March 2011); https://doi.org/10.1117/12.877511

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