@article {2344, title = {Binary image reconstruction from a small number of projections and the morphological skeleton}, journal = {ANNALS OF MATHEMATICS AND ARTIFICIAL INTELLIGENCE}, volume = {75}, year = {2015}, month = {2015}, pages = {195-216}, publisher = {Springer}, type = {Journal article}, issn = {1012-2443}, doi = {10.1007/s10472-014-9440-8}, author = {Norbert Hantos and Szabolcs Iv{\'a}n and P{\'e}ter Bal{\'a}zs and K{\'a}lm{\'a}n Pal{\'a}gyi} } @article {2356, title = {Discrete tomographic reconstruction via adaptive weighting of gradient descents}, journal = {Computer Methods in Biomechanics and Biomedical Engineering: Imaging \& Visualization}, volume = {3}, year = {2015}, month = {Feb 2014}, pages = {101-109}, publisher = {Taylor\&Francis}, type = {Journal article}, chapter = {101}, abstract = {

Discrete tomography (DT) is a set of tools for reconstructing the inner structure of objects consisting of only few different homogeneous materials. We propose a new method for multivalued DT, which performs the reconstruction as an energy minimisation task. For this algorithm, we define an energy function that can mathematically formulate the reconstruction task, and design a novel optimisation process for approximating the minima of this energy function. We validate the algorithm by comparing its performance with other cutting-edge reconstruction algorithms from the literature. We show that our method can compete with the currently used reconstruction techniques and under certain circumstances (e.g. with a low number of projections, or when the projection data are affected by random noise) it can even outperform them.

}, doi = {DOI: 10.1080/21681163.2013.853624}, author = {L{\'a}szl{\'o} G{\'a}bor Varga and P{\'e}ter Bal{\'a}zs and Antal Nagy} } @article {2354, title = {A Measure of Directional Convexity Inspired by Binary Tomography}, journal = {Fundamenta Informaticae}, volume = {141}, year = {2015}, month = {Oct 2015}, pages = {151-167}, type = {Journal article}, chapter = {151}, abstract = {

Inspired by binary tomography, we present a measure of directional convexity of binary images combining various properties of the configuration of 0s and 1s in the binary image. The measure can be supported by proper theory, is easy to compute, and as shown in our experiments, behaves intuitively. The measure can be useful in numerous applications of digital image processing and pattern recognition, and especially in binary tomography. We show in detail an application of this latter one, by providing a novel reconstruction algorithm for almost hv-convex binary images. We also present experimental results and mention some of the possible generalizations of the measure.

}, doi = {10.3233/FI-2015-1269}, author = {P{\'e}ter Bal{\'a}zs and Zolt{\'a}n Ozsv{\'a}r and Tam{\'a}s S{\'a}muel Tasi and L{\'a}szl{\'o} G Ny{\'u}l} } @article {2355, title = {Periosteal microcirculatory reactions in a zoledronate-induced osteonecrosis model of the jaw in rats}, journal = {Clinical Oral Investigations}, volume = {19}, year = {2015}, month = {July 2015}, pages = {1279-1288}, publisher = {Springer}, type = {Journal article}, chapter = {1279}, abstract = {

Objectives

Nitrogen-containing bisphosphonates induce osteonecrosis mostly in the jaw and less frequently in other bones. Because of the crucial role of periosteal perfusion in bone repair, we investigated zoledronate-induced microcirculatory reactions in the mandibular periosteum in comparison with those in the tibia in a clinically relevant model of bisphosphonate-induced medication-related osteonecrosis of the jaw (MRONJ).

Materials and methods

Sprague{\textendash}Dawley rats were treated with zoledronate (ZOL; 80 i.v. μg/kg/week over 8\ weeks) or saline vehicle. The first two right mandibular molar teeth were extracted after 3\ weeks. Various systemic and local (periosteal) microcirculatory inflammatory parameters were examined by intravital videomicroscopy after 9\ weeks.

Results

Gingival healing disorders (\~{}100\ \%) and MRONJ developed in 70\ \% of ZOL-treated cases but not after saline (shown by micro-CT). ZOL induced significantly higher degrees of periosteal leukocyte rolling and adhesion in the mandibular postcapillary venules (at both extraction and intact sites) than at the tibia. Leukocyte NADPH-oxidase activity was reduced; leukocyte CD11b and plasma TNF-alpha levels were unchanged.

Conclusion

Chronic ZOL treatment causes a distinct microcirculatory inflammatory reaction in the mandibular periosteum but not in the tibia. The local reaction in the absence of augmented systemic leukocyte inflammatory activity suggests that topically different, endothelium-specific changes may play a critical role in the pathogenesis of MRONJ.

Clinical relevance

This model permits for the first time to explore the microvascular processes in the mandibular periosteum after chronic ZOL treatment. This approach may contribute to a better understanding of the pathomechanism and the development of strategies to counteract bisphosphonate-induced side effects.

}, doi = {DOI 10.1007/s00784-014-1347-6}, author = {{\'A}gnes Janovszky and Andrea Szab{\'o} and Ren{\'a}ta Varga and D{\'e}nes Garab and Mih{\'a}ly Boros and Csilla Mester and Nikolett Beretka and Tam{\'a}s Zombori and Hans-Peter Wiesmann and Ricardo Bernhardt and Imre Ocsovszki and P{\'e}ter Bal{\'a}zs and J{\'o}zsef Piffk{\'o}} } @article {1988, title = {Eliminating switching components in binary matrices}, year = {2014}, pages = {21}, publisher = {University of Szeged}, type = {Abstract}, address = {Szeged, Hungary}, author = {Norbert Hantos and P{\'e}ter Bal{\'a}zs} } @inbook {1987, title = {Fast Heuristics for Eliminating Switching Components in Binary Matrices by 0-1 Flips}, booktitle = {Progress in Pattern Recognition, Image Analysis, Computer Vision, and Applications: 19th Iberoamerican Congress (CIARP)}, series = {LNCS}, number = {8827}, year = {2014}, month = {2014}, pages = {62-69}, publisher = {Springer}, organization = {Springer}, type = {Conference paper}, address = {Puerto Vallarta, Mexico}, abstract = {

Switching components are special patterns in binary matrices that play an essential role in many image processing and pattern analysis tasks. Finding the minimal number of 0s that must be switched to 1s in order to eliminate all switching components is an NP-complete problem. We present two novel-type heuristics for the above problems and show via experiments that they outperform the formerly proposed ones, both in optimality and in running time.

}, isbn = {978-3-319-12567-1}, issn = {0302-9743}, doi = {10.1007/978-3-319-12568-8_8}, author = {Norbert Hantos and P{\'e}ter Bal{\'a}zs}, editor = {E. Bayro-Corrochano and E. Hancock} } @inbook {1990, title = {K{\'e}pfeldolgoz{\'a}s a szegedi informatikus-k{\'e}pz{\'e}sben}, booktitle = {Informatika a fels{\H o}oktat{\'a}sban 2014}, year = {2014}, month = {2014}, pages = {667-675}, publisher = {University of Debrecen}, organization = {University of Debrecen}, type = {Conference paper}, address = {Debrecen, Hungary}, issn = {978-963-473-712-4}, author = {P{\'e}ter Bal{\'a}zs and Endre Katona and Zoltan Kato and Antal Nagy and G{\'a}bor N{\'e}meth and L{\'a}szl{\'o} G{\'a}bor Ny{\'u}l and K{\'a}lm{\'a}n Pal{\'a}gyi and Attila Tanacs and L{\'a}szl{\'o} G{\'a}bor Varga}, editor = {Roland Kunkli and Ildik{\'o} Papp and Ed{\'e}n{\'e} Rutkovszky} } @article {1989, title = {Reconstruction of hv-convex binary matrices from horizontal and vertical projections based on simulated annealing}, year = {2014}, pages = {50}, publisher = {University of Szeged}, type = {Abstract}, address = {Szeged, Hungary}, author = {Zolt{\'a}n Ozsv{\'a}r and P{\'e}ter Bal{\'a}zs} }