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Title: Quantitative assessment of hip osteoarthritis based on image texture analysis
Authors: Μπονιάτης, Ιωάννης Σ.
Κωσταρίδου, Ελένη
Κάβουρας, Διονύσης Α.
Παναγιωτόπουλος, Ηλίας
Παναγιωτάκης, Γεώργιος Σ.
Item type: Journal article
Keywords: Osteoarthritis;Digital image texture analysis;Οστεοαρθρίτιδα;Ψηφιακή εικονική ανάλυση υφής
Subjects: Medicine
Biomedical engineering
Βιοϊατρική τεχνολογία
Issue Date: 30-Apr-2015
Publisher: British Institute of Radiology
Abstract: A non-invasive method was developed to investigate the potential capacity of digital image texture analysis in evaluating the severity of hip osteoarthritis (OA) and in monitoring its progression. 19 textural features evaluating patterns of pixel intensity fluctuations were extracted from 64 images of radiographic hip joint spaces (HJS), corresponding to 32 patients with verified unilateral or bilateral OA. Images were enhanced employing custom developed software for the delineation of the articular margins on digitized pelvic radiographs. The severity of OA for each patient was assessed by expert orthopaedists employing the Kellgren and Lawrence (KL) scale. Additionally, an index expressing HJS-narrowing was computed considering patients from the unilateral OA-group. A textural feature that quantified pixel distribution non-uniformity (grey level non-uniformity, GLNU) demonstrated the strongest correlation with the HJS-narrowing index among all extracted features and utilized in further analysis. Classification rules employing GLNU feature were introduced to characterize a hip as normal or osteoarthritic and to assign it to one of three severity categories, formed in accordance with the KL scale. Application of the proposed rules resulted in relatively high classification accuracies in characterizing a hip as normal or osteoarthritic (90.6%) and in assigning it to the correct KL scale category (88.9%). Furthermore, the strong correlation between the HJS-narrowing index and the pathological GLNU (r = −0.9, p<0.001) was utilized to provide percentages quantifying hip OA-severity. Texture analysis may contribute in the quantitative assessment of OA-severity, in the monitoring of OA-progression and in the evaluation of a chondroprotective therapy.
Language: English
Citation: Boniatis, I., Costaridou, L., Cavouras, D., Panagiotopoulos, E. and Panayiotakis, G. (2006). Quantitative assessment of hip osteoarthritis based on image texture analysis. The British Journal of Radiology. 79(939). pp. 232-238. British Institute of Radiology: 2006.
Journal: British Journal of Radiology
Type of Journal: With a review process (peer review)
Access scheme: Embargo
License: Αναφορά Δημιουργού-Μη Εμπορική Χρήση-Όχι Παράγωγα Έργα 3.0 Ηνωμένες Πολιτείες
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