Please use this identifier to cite or link to this item: http://hdl.handle.net/11400/3918
Title: A digital subtraction radiography scheme based on automatic multiresolution registration
Authors: Ζαχαράκη, Ευαγγελία Ι.
Ματσόπουλος, Γεώργιος Κ.
Ασβεστάς, Παντελής Α.
Νικήτα, Κωνσταντίνα Σ.
Gröndahl, K.
Contributors: Gröndahl, H-G.
Item type: Journal article
Keywords: Image registration;Fusion;Εγγραφή εικόνας;Ένωση
Subjects: Medicine
Ιατρική
Internal medicine
Εσωτερική παθολογία
Issue Date: 13-Jan-2015
2004
Date of availability: 13-Jan-2015
Publisher: The British Institute of Radiology
Abstract: Objectives: To establish a digital subtraction radiography scheme for aligning clinical in vivo radiographs based on the implementations of an automatic geometric registration method and a contrast correction technique. Methods: Thirty-five pairs of in vivo dental radiographs from four clinical studies were used in this work. First, each image pair was automatically aligned by applying a multiresolution registration strategy using the affine transformation followed by the implementation of the projective transformation at full resolution. Then, a contrast correction technique was applied in order to produce subtraction radiographs and fused images for further clinical evaluation. The performance of the proposed registration method was assessed against a manual method based on the projective transformation. Results: The qualitative assessment of the experiments based on visual inspection has shown advantageous performance of the proposed automatic registration method against the manual method. Furthermore, the quantitative analysis showed statistical difference in terms of the root mean square (RMS) error estimated over the whole images and specific regions of interest. Conclusions: The proposed automatic geometric registration method is capable of aligning radiographs acquired with or without rigorous a priori standardization. The methodology is pixel-based and does not require the application of any segmentation process prior to alignment. The employed projective transformation provides a reliable model for registering intraoral radiographs. The implemented contrast correction technique sequentially applied provides subtraction radiographs and fused images for clinical evaluation regarding the evolution of a disease or the response to a therapeutic scheme.
Language: English
Citation: Zacharaki, E., Matsopoulos, G., Asvestas, P., Nikita, K., Grondahl, K., et al. (2004). A digital subtraction radiography scheme based on automatic multiresolution registration. "Dentomaxillofacial Radiology". 33 (6). p. 1-12. Available from: http://www.birpublications.org/ [Accessed 28/01/2014]
Journal: Dentomaxillofacial Radiology
Type of Journal: With a review process (peer review)
Access scheme: Publicly accessible
License: Αναφορά Δημιουργού-Μη Εμπορική Χρήση-Όχι Παράγωγα Έργα 3.0 Ηνωμένες Πολιτείες
URI: http://hdl.handle.net/11400/3918
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