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Informatica


Feature-Based Registration of Thorax CT Scan Slices
Volume 28, Issue 3 (2017), pp. 439–452
Pub. online: 1 January 2017      Type: Research Article      Open accessOpen Access
Received
1 December 2016
Accepted
1 August 2017
Published
1 January 2017

Abstract

Radiologists need to find a position of a slice of one computed tomography (CT) scan in another scan. The image registration is a technique used to transform several images into one coordinate system and to compare them. Such transversal plane images obtained by CT scans are considered, where ribs are visible, but it does not lessen the significance of our work because many important internal organs are located here: liver, heart, stomach, pancreas, lungs, etc. The new method is developed for registration based on the mathematical model describing the rib-bounded contour. Parameters of the mathematical model and of distribution of the bone tissue on the CT scan slice form a set of features describing a particular slice. The registration method applies translation, rotation, and scaling invariances. Several strategies of translation invariance and options of the unification of scales are proposed. The method is examined on real CT scans seeking for its best performance.

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Biographies

Bilinskas Mykolas J.
mykolas.bilinskas@mii.vu.lt

M.J. Bilinskas received BA in software engineering in 2011 and MS in computer modelling in 2013 from Vilnius University Faculty of Mathematics and Informatics. He got experience in software development in CERN (European Organization for Nuclear Research) in Switzerland and in the Joint Stock Company Altechna. Currently he is a PhD student in the Vilnius University Institute of Mathematics and Informatics. His interests include computer vision and computational geometry.

Dzemyda Gintautas
gintautas.dzemyda@mii.vu.lt

G. Dzemyda received the doctoral degree in technical sciences (PhD) in 1984, and he received the degree of Doctor Habilius in 1997 from the Kaunas University of Technology. He was conferred the title of Professor (1998) at the Kaunas University of Technology. Full member of the Lithuanian Academy of Sciences (2011). Recent employment is at the Vilnius University Institute of Mathematics and Informatics as the director of the Institute, a head of Cognitive Computing Group and principal researcher.

The research interests cover visualization of multidimensional data, optimization theory and applications, data mining in databases, multiple criteria decision support, neural networks, parallel optimization, image analysis. The author of more than 240 scientific publications, two monographs, five textbooks. Editor in chief of the international journals Informatica and Baltic Journal of Modern Computing. Member of editorial boards of seven international journals.

Trakymas Mantas

M. Trakymas received MD in 1998 and PhD in 2008 from Vilnius University Faculty of Medicine. He works as interventional oncologist and oncoradiologist in Department of Radiology, Center of Radiology, Nuclear Medicine and Outpatient Department, National Cancer Institute, Lithuania since 2001. His interests are interventional oncology, tumour ablation, guiding systems, ultrasound, liver, kidney, and breast cancer.


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Copyright
© 2017 Vilnius University
Open access article under the CC BY license.

Keywords
image registration computed tomography thorax bone tissue feature-based registration image parameterization

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