Share Email Print

Proceedings Paper

Estimation of cartilaginous region in noncontrast CT of the chest
Author(s): Qian Zhao; Nabile Safdar; Glenna Yu; Emmarie Myers; Anthony Sandler; Marius George Linguraru
Format Member Price Non-Member Price
PDF $17.00 $21.00

Paper Abstract

Pectus excavatum is a posterior depression of the sternum and adjacent costal cartilages and is the most common congenital deformity of the anterior chest wall. Its surgical repair can be performed via minimally invasive procedures that involve sternum and cartilage relocation and benefit from adequate surgical planning. In this study, we propose a method to estimate the cartilage regions in thoracic CT scans, which is the first step of statistical modeling of the osseous and cartilaginous structures for the rib cage. The ribs and sternum are first segmented by using interactive region growing and removing the vertebral column with morphological operations. The entire chest wall is also segmented to estimate the skin surface. After the segmentation, surface meshes are generated from the volumetric data and the skeleton of the ribs is extracted using surface contraction method. Then the cartilage surface is approximated via contracting the skin surface to the osseous structure. The ribs’ skeleton is projected to the cartilage surface and the cartilages are estimated using cubic interpolation given the joints with the sternum. The final cartilage regions are formed by the cartilage surface inside the convex hull of the estimated cartilages. The method was validated with the CT scans of two pectus excavatum patients and three healthy subjects. The average distance between the estimated cartilage surface and the ground truth is 2.89 mm. The promising results indicate the effectiveness of cartilage surface estimation using the skin surface.

Paper Details

Date Published: 18 March 2014
PDF: 7 pages
Proc. SPIE 9035, Medical Imaging 2014: Computer-Aided Diagnosis, 90350N (18 March 2014); doi: 10.1117/12.2043117
Show Author Affiliations
Qian Zhao, Children's National Medical Ctr. (United States)
Nabile Safdar, Children's National Medical Ctr. (United States)
Glenna Yu, Children's National Medical Ctr. (United States)
Princeton Univ. (United States)
Emmarie Myers, Children's National Medical Ctr. (United States)
Anthony Sandler, Children's National Medical Ctr. (United States)
Marius George Linguraru, Children's National Medical Ctr. (United States)

Published in SPIE Proceedings Vol. 9035:
Medical Imaging 2014: Computer-Aided Diagnosis
Stephen Aylward; Lubomir M. Hadjiiski, Editor(s)

© SPIE. Terms of Use
Back to Top
Sign in to read the full article
Create a free SPIE account to get access to
premium articles and original research
Forgot your username?