title: Atlas-based rib-bone detection in chest X-rays.
abstract: This paper investigates using rib-bone atlases for automatic detection of rib-bones in chest X-rays (CXRs). We built a system that takes patient X-ray and model atlases as input and automatically computes the posterior rib borders with high accuracy and efficiency. In addition to conventional atlas, we propose two alternative atlases: (i) automatically computed rib bone models using Computed Tomography (CT) scans, and (ii) dual energy CXRs. We test the proposed approach with each model on 25 CXRs from the Japanese Society of Radiological Technology (JSRT) dataset and another 25 CXRs from the National Library of Medicine CXR dataset. We achieve an area under the ROC curve (AUC) of about 95% for Montgomery and 91% for JSRT datasets. Using the optimal operating point of the ROC curve, we achieve a segmentation accuracy of 88.91±1.8% for Montgomery and 85.48±3.3% for JSRT datasets. Our method produces comparable results with the state-of-the-art algorithms. The performance of our method is also excellent on challenging X-rays as it successfully addressed the rib-shape variance between patients and number of visible rib-bones due to patient respiration.
authors.affiliation: Lister Hill National Center for Biomedical Communications U.S. National Library of Medicine, National Institutes of Health, Bethesda, MD, USA. Electronic address: sema.candemir@nih.gov.
authors.forename: Sema
authors.initials: S
authors.lastname: Candemir
authors.affiliation: Lister Hill National Center for Biomedical Communications U.S. National Library of Medicine, National Institutes of Health, Bethesda, MD, USA. Electronic address: stefan.jaeger@nih.gov.
authors.forename: Stefan
authors.initials: S
authors.lastname: Jaeger
authors.affiliation: Lister Hill National Center for Biomedical Communications U.S. National Library of Medicine, National Institutes of Health, Bethesda, MD, USA. Electronic address: sameer.antani@nih.gov.
authors.forename: Sameer
authors.initials: S
authors.lastname: Antani
authors.affiliation: Center for Research in Computer Vision, University of Central Florida, Orlando, FL, USA. Electronic address: ulas.bagci@nih.gov.
authors.forename: Ulas
authors.initials: U
authors.lastname: Bagci
authors.affiliation: Radiology and Imaging Sciences, National Institutes of Health, Bethesda, MD, USA. Electronic address: les.folio@nih.gov.
authors.forename: Les R
authors.initials: LR
authors.lastname: Folio
authors.affiliation: Radiology and Imaging Sciences, National Institutes of Health, Bethesda, MD, USA. Electronic address: ziyue.xu@nih.gov.
authors.forename: Ziyue
authors.initials: Z
authors.lastname: Xu
authors.affiliation: Lister Hill National Center for Biomedical Communications U.S. National Library of Medicine, National Institutes of Health, Bethesda, MD, USA. Electronic address: george.thoma@nih.gov.
authors.forename: George
authors.initials: G
authors.lastname: Thoma
mesh_terms: D000465:Algorithms; D000716:Anatomy, Artistic; D001271:Atlases as Topic; D001331:Automation; D066264:Datasets as Topic; D006801:Humans; D012372:ROC Curve; D013902:Radiography, Thoracic; D012272:Ribs / Q000033:anatomy & histology* / Q000000981:diagnostic imaging*; D014057:Tomography, X-Ray Computed
keywords: Chest X-rays; Rib bone extraction