%0 Book Section %B Proceedings of the ACCV Workshop on Intelligent Mobile and Egocentric Vision (ACCV-IMEV), Lecture Notes in Computer Science %D 2015 %T Collaborative Mobile 3D Reconstruction of Urban Scenes %A Attila Tanacs %A András Majdik %A Levente Hajder %A Jozsef Molnar %A Zsolt Santa %A Zoltan Kato %E Chu-Song Chen %E Mohan Kankanhall %E Shang-Hong Lai %E Joo Hwee %B Proceedings of the ACCV Workshop on Intelligent Mobile and Egocentric Vision (ACCV-IMEV), Lecture Notes in Computer Science %I Springer %C Singapore %P 1-16 %8 Nov 2014 %G eng %9 Conference paper %0 Journal Article %J PATTERN RECOGNITION %D 2015 %T Estimation of linear deformations of 2D and 3D fuzzy objects %A Attila Tanacs %A Joakim Lindbald %A Nataša Sladoje %A Zoltan Kato %X

Registration is a fundamental task in image processing, it is used to determine geometric correspondences between images taken at different times and/or from different viewpoints. Here we propose a general framework in n-dimensions to solve binary shape/object matching problems without the need of establishing additional point or other type of correspondences. The approach is based on generating and solving polynomial systems of equations. We also propose an extension which, provided that a suitable segmentation method can produce a fuzzy border representation, further increases the registration precision. Via numerous synthetic and real test we examine the different solution techniques of the polynomial systems of equations. We take into account a direct analytical, an iterative least-squares, and a combined method. Iterative and combined approaches produce the most precise results. Comparison is made against competing methods for rigid-body problems. Our method is orders of magnitude faster and is able to recover alignment regardless of the magnitude of the deformation compared to the narrow capture range of others. The applicability of the proposed methods is demonstrated on real X-ray images of hip replacement implants and 3D CT volumes of the pelvic area. Since the images must be parsed through only once, our approach is especially suitable for solving registration problems of large images.

%B PATTERN RECOGNITION %I Elsevier %V 48 %P 1387-1399 %8 Apr 2015 %G eng %N 4 %9 Journal Article %R 10.1016/j.patcog.2014.10.006 %0 Conference Paper %B International Conference on Digital Image Computing: Techniques and Applications (DICTA) %D 2014 %T Establishing Correspondences between Planar Image Patches %A Attila Tanacs %A András Majdik %A Jozsef Molnar %A Atul Rai %A Zoltan Kato %E Abdesselam Bouzerdoum %E Lei Wang %E Philip Ogunbona %E Wanqing Li %E Son Lam Phung %B International Conference on Digital Image Computing: Techniques and Applications (DICTA) %I IEEE %C Wollongong, Australia %P 1-7 %8 2014 %G eng %9 Conference paper %0 Book Section %B Informatika a felsőoktatásban 2014 %D 2014 %T Képfeldolgozás a szegedi informatikus-képzésben %A Péter Balázs %A Endre Katona %A Zoltan Kato %A Antal Nagy %A Gábor Németh %A László Gábor Nyúl %A Kálmán Palágyi %A Attila Tanacs %A László Gábor Varga %E Roland Kunkli %E Ildikó Papp %E Edéné Rutkovszky %B Informatika a felsőoktatásban 2014 %I University of Debrecen %C Debrecen, Hungary %P 667-675 %8 2014 %G hun %9 Conference paper %0 Conference Proceedings %D 2014 %T X. Magyar Számítógépes Nyelvészeti Konferencia %E Attila Tanacs %E Viktor Varga %E Veronika Vincze %I Szegedi Tudományegyetem Informatikai Tanszékcsoport %C Szeged %8 2014 %G eng %U http://www.inf.u-szeged.hu/rgai/mszny2014/ %9 Conference proceedings %0 Conference Paper %B A Képfeldolgozók és Alakfelismerők Társaságának konferenciája - KÉPAF 2013 %D 2013 %T 2D és 3D bináris objektumok lineáris deformáció-becslésének numerikus megoldási lehetőségei %A Attila Tanacs %A Joakim Lindblad %A Nataša Sladoje %A Zoltan Kato %E László Czúni %B A Képfeldolgozók és Alakfelismerők Társaságának konferenciája - KÉPAF 2013 %I NJSZT-KÉPAF %C Veszprém %P 526 - 541 %8 Jan 2013 %G eng %9 Conference paper %0 Book Section %B Proceedings of ISPA 2013 8th International Symposium on Image and Signal Processing and Analysis %D 2013 %T Car Recognition from Frontal Images in Mobile Environment %B Proceedings of ISPA 2013 8th International Symposium on Image and Signal Processing and Analysis %I University of Zagreb; University of Trieste %C Trieste %P 812 - 816 %8 Sep 2013 %G eng %9 Conference paper %0 Book Section %B Proceedings of the International Symposium on Image and Signal Processing and Analysis (ISPA) %D 2013 %T Evaluation of Point Matching Methods for Wide-baseline Stereo Correspondence on Mobile Platforms %A Endre Juhász %A Attila Tanacs %A Zoltan Kato %E Giovanni Ramponi %E Sven Lončarić %E Alberto Carini %E Karen Egiazarian %X

Wide-baseline stereo matching is a common problem of computer vision. By the explosion of smartphones equipped with camera modules, many classical computer vision solutions have been adapted to such platforms. Considering the widespread use of various networking options for mobile phones, one can consider a set of smart phones as an ad-hoc camera network, where each camera is equipped with a more and more powerful computing engine in addition to a limited bandwidth communication with other devices. Therefore the performance of classical vision algorithms in a collaborative mobile environment is of particular interest. In such a scenario we expect that the images are taken almost simultaneously but from different viewpoints, implying that the camera poses are significantly different but lighting conditions are the same. In this work, we provide quantitative comparison of the most important keypoint detectors and descriptors in the context of wide baseline stereo matching. We found that for resolution of 2 megapixels images the current mobile hardware is capable of providing results efficiently.

 

%B Proceedings of the International Symposium on Image and Signal Processing and Analysis (ISPA) %I IEEE %C Trieste %P 806 - 811 %8 Sep 2013 %G eng %9 Conference paper %R 10.1109/ISPA.2013.6703848 %0 Conference Paper %B A Képfeldolgozók és Alakfelismerők Társaságának konferenciája - KÉPAF 2013 %D 2013 %T Gépkocsi felismerés elölnézeti képek alapján %A Viktor Varjas %A Attila Tanacs %E László Czúni %B A Képfeldolgozók és Alakfelismerők Társaságának konferenciája - KÉPAF 2013 %I NJSZT-KÉPAF %C Veszprém %P 294 - 308 %8 Jan 2013 %G eng %9 Conference paper %0 Generic %D 2012 %T Affine Registration of 3D Objects %X

This is the sample implementation and benchmark dataset of the binary image registration algorithm described in the following papers: Attila Tanacs and Zoltan Kato. Fast Linear Registration of 3D Objects Segmented from Medical Images. In Proceedings of International Conference on BioMedical Engineering and Informatics, Shanghai, China, pages 299--303, October 2011. IEEE. Attila Tanacs, Joakim Lindblad, Natasa Sladoje and Zoltan Kato. Estimation of Linear Deformations of 3D Objects. In Proceedings of International Conference on Image Processing, Hong Kong, China, pp. 153-156, September 2010. IEEE.

%8 2012/// %G eng %U http://www.inf.u-szeged.hu/~kato/software/affbin3dregdemo.html %9 Software %0 Conference Paper %B A Képfeldolgozók és Alakfelismerők Társaságának konferenciája - KÉPAF 2011 %D 2011 %T 3D objektumok lineáris deformációinak becslése %A Attila Tanacs %A Joakim Lindblad %A Nataša Sladoje %A Zoltan Kato %E Zoltan Kato %E Kálmán Palágyi %B A Képfeldolgozók és Alakfelismerők Társaságának konferenciája - KÉPAF 2011 %I NJSZT %C Szeged %P 471 - 480 %8 Jan 2011 %G eng %9 Conference paper %0 Conference Paper %B Biomedical Engineering and Informatics (BMEI) %D 2011 %T Fast linear registration of 3D objects segmented from medical images %A Attila Tanacs %A Zoltan Kato %E Yongsheng Ding %E Yonghong Peng %E Riyi Shi %E Kuangrong Hao %E Lipo Wang %X

In this paper a linear registration framework is used for medical image registration using segmented binary objects. The method is best suited for problems where the segmentation is available, but we also propose a general bone segmentation approach for CT images. We focus on the case when the objects to be registered differ considerably because of segmentation errors. We check the applicability of the method to bone segmentation of pelvic and thoracic CT images. Comparison is also made against a classical mutual information-based registration method. © 2011 IEEE.

%B Biomedical Engineering and Informatics (BMEI) %I IEEE %C Shanghai %P 294 - 298 %8 Oct 2011 %@ 978-1-4244-9351-7 %G eng %9 Conference paper %M 12436502 %R 10.1109/BMEI.2011.6098290 %0 Book Section %B Képi információ mérése %D 2011 %T Orvosi képfeldolgozás, Orvosi algoritmusok, Távérzékelés, mikroszkópia %A Attila Tanacs %A László Czúni %A Attila Tanacs %B Képi információ mérése %I Typotex Kiadó %C Budapest %P 57 - 105 %8 2011 %G hun %9 Book chapter %0 Conference Proceedings %B Magyar Számítógépes Nyelvészeti Konferencia %D 2011 %T VIII. Magyar Számítógépes Nyelvészeti Konferencia %E Attila Tanacs %E Veronika Vincze %B Magyar Számítógépes Nyelvészeti Konferencia %I Szegedi Tudományegyetem %C Szeged %8 Dec 2011 %@ 978-963-306-121-3 %G eng %U http://www.inf.u-szeged.hu/mszny2011/ %9 Conference proceedings %0 Book Section %B IEEE International Conference on Image Processing (ICIP) %D 2010 %T Estimation of linear deformations of 3D objects %A Attila Tanacs %A Joakim Lindblad %A Nataša Sladoje %A Zoltan Kato %X

We propose a registration method to find affine transformations between 3D objects by constructing and solving an overdetermined system of polynomial equations. We utilize voxel coverage information for more precise object boundary description. An iterative solution enables us to easily adjust the method to recover e.g. rigid-body and similarity transformations. Synthetic tests show the advantage of the voxel coverage representation, and reveal the robustness properties of our method against different types of segmentation errors. The method is tested on a real medical CT volume. © 2010 IEEE.

%B IEEE International Conference on Image Processing (ICIP) %I IEEE %C Hong Kong, Hong Kong %P 153 - 156 %8 Sep 2010 %G eng %9 Conference paper %0 Book %D 2010 %T VII. Magyar Számítógépes Nyelvészeti Konferencia %I Szegedi Tudományegyetem %C Szeged %8 2010 %G eng %U http://www.inf.u-szeged.hu/mszny2010/mszny2010.pdf %0 Book Section %B Proceedings of the 6th International Symposium on Image and Signal Processing and Analysis %D 2009 %T Object subsampling strategies to improve computational performance %A András Hajdú %A Péter Veres %A Attila Tanacs %A Rorland Harangozó %E P Zinterhof %E Sven Lončarić %E A Uhl %E Alberto Carini %X

We investigate object simplification methods based on Centroidal Voronoi Tesselation (CVT) that share the possibility of great speed-ups in various scenarios. We propose Constrained CVT to sample points from the object boundary and the Region-based CVT to be able to subsample lower dimensional objects, as well. Moreover we introduce custom weight functions based on object properties. Thus, wecan be more specific on what are the important parts of the subsampled object. We also list several novel applications corresponding to the theoretical achivements presented. The advantages of applying the subsampling strategies are presented for registration, human detection, and the segmentation of the retinal vascular system, respectively. Quantitative results are shown to check the deterioration of the accuracy with the level of subsampling, and the computational gain. We also make comparisons with other naive (e.g. random) subsampling methods.

%B Proceedings of the 6th International Symposium on Image and Signal Processing and Analysis %I IEEE Press %C Salzburg %P 448 - 453 %8 Sep 2009 %G eng %9 Conference paper %0 Book Section %B Image Analysis %D 2009 %T Recovering affine deformations of fuzzy shapes %A Attila Tanacs %A Csaba Domokos %A Nataša Sladoje %A Joakim Lindblad %A Zoltan Kato %E Arnt-Borre Salberg %E Jon Yngve Hardeberg %E Robert Jenssen %X

Fuzzy sets and fuzzy techniques are attracting increasing attention nowadays in the field of image processing and analysis. It has been shown that the information preserved by using fuzzy representation based on area coverage may be successfully utilized to improve precision and accuracy of several shape descriptors; geometric moments of a shape are among them. We propose to extend an existing binary shape matching method to take advantage of fuzzy object representation. The result of a synthetic test show that fuzzy representation yields smaller registration errors in average. A segmentation method is also presented to generate fuzzy segmentations of real images. The applicability of the proposed methods is demonstrated on real X-ray images of hip replacement implants. © 2009 Springer Berlin Heidelberg.

%B Image Analysis %S Lecture Notes in Computer Science %I Springer-Verlag %C Oslo, Norway %P 735 - 744 %8 June 2009 %G eng %9 Conference paper %! LNCS %R 10.1007/978-3-642-02230-2_75 %0 Book %D 2009 %T VI. Magyar Számítógépes Nyelvészeti Konferencia (MSZNY 2009) %I Szegedi Tudományegyetem Informatikai Tanszékcsoport %C Szeged %8 2009 %G eng %0 Conference Paper %B Proceedings of the Eight World Conference WCNR-8 %D 2008 %T Comparison Radiography and Tomography Possibilities of FRM-II (20 MW) and Budapest (10 MW) Research Reactor %A Márton Balaskó %A Attila Kuba %A Attila Tanacs %A Zoltán Kiss %A Antal Nagy %A Burkhard Schillinger %E Muhammed Arif %B Proceedings of the Eight World Conference WCNR-8 %P 18–27 %8 October %0 Book Section %B Informatika a felsőoktatásban 2008 %D 2008 %T A képfeldolgozás kutatása a Szegedi Tudományegyetemen %X A digitális képfeldolgozás kutatásának a Szegedi TudományegyetemTermészettudományi és Informatikai Karán, az Informatikai Tanszékcsoport Képfeldolgozás és Számítógépes Grafika Tanszékén közel négy évtizedes hagyománya van. A Tanszék valamennyi munkatársa nemzetközileg elismert kutatómunkát folytat, melyet már több száz rangos publikáció fémjelez. Számos, a képfeldolgozás kutatásában vezető egyetemmel és kutatóintézettel építettünk ki szoros kapcsolatot és folytattunk eredményes kutatómunkát, aktív résztvevői vagyunk a hazai és a nemzetközi tudományos közéletnek. A legfontosabb, jelenleg is folyó kutatásaink: orvosi képek feldolgozása, diszkrét tomográfia, képszegmentálás, térinformatika, távérzékelés, képregisztráció, vázkijelölés, műtéti tervezés. %B Informatika a felsőoktatásban 2008 %I Debreceni Egyetem Informatikai Kar %C Debrecen %8 2008/// %G eng %U http://www.agr.unideb.hu/if2008/kiadvany/papers/E62.pdf %0 Conference Paper %B Proceedings of the Eight World Conference WCNR-8 %D 2008 %T Study of the Inner Structure of a Damaged Control Rod by Neutron and X-ray Radiography and Discrete Tomography %A Márton Balaskó %A Erzsébet Sváb %A Zoltán Kiss %A Attila Tanacs %A Antal Nagy %A Attila Kuba %E Muhammed Arif %B Proceedings of the Eight World Conference WCNR-8 %P 294–303 %8 October %0 Patent %D 2007 %T Method and system for automatically transforming CT studies to a common reference frame %A Attila Tanacs %A Eörs Máté %A Attila Kuba %7 US Patent Application %8 2007 %G eng %9 Patent %& #20070002046 (Filing Date: 1/04/2007), 2007. %0 Book %D 2007 %T V. Magyar Számítógépes Nyelvészeti Konferencia %I Szegedi Tudományegyetem %C Szeged %8 2007 %G eng %U http://nektar.oszk.hu/hu/manifestation/2800373 %0 Journal Article %J BRACHYTHERAPY %D 2006 %T Robotically assisted prostate brachytherapy with transrectal ultrasound guidance - Phantom experiments %X PURPOSE: To report the preliminary experimental results obtained with a robot-assisted transrectal ultrasound (TRUS)-guided prostate brachytherapy system. METHODS AND MATERIALS: The system consists of a TRUS unit, a spatially coregistered needle insertion robot, and an FDA-approved treatment planning and image-registered implant system. The robot receives each entry/target coordinate pair of the implant plan, inserts a preloaded needle, and then the seeds are deposited. The needles/sources are tracked in TRUS, thus allowing the plan to be updated as the procedure progresses. RESULTS: The first insertion attempt was recorded for each needle, without adjustment. All clinically relevant locations were reached in a prostate phantom. Nonparallel and parallel needle trajectories were demonstrated. Based on TRUS, the average transverse placement error was 2 mm (worst case 2.5 mm, 80% less than 2 mm), and the average sagittal error was 2.5 mm (worst case 5.0 mm, 70% less than 2.5 mm). CONCLUSIONS: The concept and technical viability of robot-assisted brachytherapy were demonstrated in phantoms. The kinematically decoupled robotic assistant device is inherently safe. Overall performance was promising, but further optimization is necessary to prove the possibility of improved dosimetry. © 2006 American Brachytherapy Society. All rights reserved. %B BRACHYTHERAPY %V 5 %P 14 - 26 %8 2006 %@ 1538-4721 %G eng %N 1 %! BRACHYTHERAPY %0 Journal Article %J LECTURE NOTES IN COMPUTER SCIENCE %D 2005 %T Application of automatic image registration in a segmentation framework of pelvic CT images %B LECTURE NOTES IN COMPUTER SCIENCE %C MAINTZ JBA, 1998, MED IMAGE ANAL, V2, P1PEKAR V, 2004, INT J RADIAT ONCOL, V60, P973, DOI 10.1016/j.ijrobp.2004.06.004 TANACS A, 2003, ACTA CYBERNET, V16, P327 WEST J, 1999, IEEE T MED IMAGING, V18, P144 ZHAN YQ, 2004, IEEE INT S BIOM IM I %V 3691 %P 628 - 635 %8 2005 %@ 0302-9743 %G eng %! LECT NOTES COMPUT SCI %0 Journal Article %J JOURNAL OF AFFECTIVE DISORDERS %D 2005 %T Dopamine transporter availability in medication free and in bupropion treated depression: a 99mTc-TRODAT-1 SPECT study. %X BACKGROUND: Bupropion is thought to exert its antidepressive effect by blocking the dopamine transporter (DAT). The purpose of this study was to evaluate the DAT activity in depressed patients by means of 99mTc-TRODAT-1 SPECT in relation to the efficacy of bupropion treatment. METHODS: In 12 healthy controls and 16 depressed patients the baseline DAT activity was examined. Nine of the 16 patients went through an additional second SPECT investigation, after 4 weeks of bupropion treatment. RESULTS: In the depressed patients, the baseline DAT striatum-occipital ratio (SOR) (1.04+/-.36, mean+/-SD) was not significantly different from that in the control group (1.12+/-.33) (p>.05). Correlation was found between baseline SOR and HAM-D score change (r=-.745, p=.02) of the bupropion treated patients. The average DAT occupancy due to the bupropion treatment was 20.84+/-27.7%. No significant correlation between the therapeutical effectiveness and the occupancy was observed. LIMITATIONS: One of the limiting factors of our study has been the lack of drug monitoring. CONCLUSIONS: In good agreement with other PET studies, we found 20.84% DAT occupancy during bupropion treatment. The lack of correlation between the efficacy of therapy and occupancy of DAT may raise the question as to whether other mechanisms are involved in the effect of bupropion. %B JOURNAL OF AFFECTIVE DISORDERS %V 89 %P 115 - 123 %8 2005 %@ 0165-0327 %G eng %N 1-3 %! J AFFECT DISORDERS %0 Journal Article %J EUROPEAN JOURNAL OF NUCLEAR MEDICINE AND MOLECULAR IMAGING %D 2004 %T Effects of bupropion in depression: a 99mTc-TRODAT SPECT study %B EUROPEAN JOURNAL OF NUCLEAR MEDICINE AND MOLECULAR IMAGING %V 31 %P S228 %8 2004 %@ 1619-7070 %G eng %! EUR J NUCL MED MOL I %0 Journal Article %J Alkamazott Matematikai Lapok %D 2004 %T Image registration methods based on interactively identified point pairs %A Attila Tanacs %B Alkamazott Matematikai Lapok %V 21 %P 237-260 %8 2004 %G eng %9 Journal Article %0 Journal Article %J ALKALMAZOTT MATEMATIKAI LAPOK %D 2004 %T Kijelölt pontpárokon alapuló képregisztrációs módszerek %B ALKALMAZOTT MATEMATIKAI LAPOK %V 21 %P 237 - 260 %8 2004 %@ 0133-3399 %G eng %! ALKALMAZOTT MATEMATIKAI LAPOK %0 Conference Paper %B A Képfeldolgozók és Alakfelismerők Társaságának konferenciája - KÉPAF 2004 %D 2004 %T Számítógépes képfeldolgozás oktatása a Szegedi Tudományegyetemen %X

Az SZTE Informatikai Tanszékcsoportja által gondozott szakoktanterveiben 1993 óta szerepel a képfeldolgozás és alkalmazásainak oktatása. A kreditrendszer bevezetésével a Képfeldolgozás I. tárgy kötelező az ötéves képzésben részt vevő informatikus hallgatóknak. Ezen felül a választható szakirányok között szintén szerepel a Képfeldolgozás szakirány. A szakirányon belül különböző képpfeldolgozási területeket tárgyaló kurzusok épülnek egymásra. Az elméleti megalapozás mellett a képfeldolgozás alkalmazásaira is nagy hangsúlyt fektetünk. A kutatások illetve az orvosi alkalmazások fejlesztése során szerzett eredményeket a kötelező jellegű tárgyak mellett speciálkollégiumok keretében építjül be az otkatási anyagba. Számos hallgatónk választ a képfeldolgzás területéről témát a diplomamunkájához, dolgozataikkal rendszeresen és sikerrel szerepelnek az OTDK-n. Hallgatóink évente több hónapot tölthetnek külföldi partneregyetemeinken, ahol a kutató- és fejlesztőmunka mellett nálunk is elfogadott kurzusokat teljesíthetnek. A képfeldolgozás témakörön belül "ipari" projekt munkákban is egyre több hallgató vesz részt. A doktori programon belül is meghirdetünk képfeldolgozáshoz kapcsolódó kutatási irányokat. Az évente megrendezésre kerülő, 11-éves múltra visszatekintő Képfeldolgozó Nyári Iskolának (SSIP) eddig hatszor adott otthont Szeged. A rendszvénysorozat kiemelkedő fontosságú nemzetközi fórum hallgatóink és oktatóink számára is.

%B A Képfeldolgozók és Alakfelismerők Társaságának konferenciája - KÉPAF 2004 %I Neumann János Számítógép-tudományi Társaság %C Miskolc %P 191 - 196 %8 Jan 2004 %G eng %0 Journal Article %J ACTA CYBERNETICA-SZEGED %D 2003 %T Evaluation of a fully automatic medical image registration algorithm based on mutual information %X Registration is a fundamental task in image processing. Its purpose is to find a geometrical transformation that relates the points of an image to their corresponding points of another image. Many registration algorithms have been proposed in the past decade. We present a fast, fully automatic algorithm that is capable of solving rigid-body registration of 3D images of the human brain where the images are taken by different imaging devices. We joined the Retrospective Registration Evaluation Project conducted by Vanderbilt University, USA. The evaluations of our results show that our method has the potential to produce satisfactory results, but visual inspection is necessary to guard against large errors. %B ACTA CYBERNETICA-SZEGED %V 16 %P 327 - 336 %8 2003 %@ 0324-721X %G eng %N 2 %! ACTA CYBERN-SZEGED %0 Journal Article %J ACADEMIC RADIOLOGY %D 2003 %T Po-topic IV-05: Prostate biopsy and local therapy inside conventional closed mri with robotic assistance - animal studies %B ACADEMIC RADIOLOGY %V 10 %P 955 %8 2003 %@ 1076-6332 %G eng %N 8 %! ACAD RADIOL %0 Journal Article %J RADIOLOGY %D 2003 %T System for MR image-guided prostate interventions: Canine study %X The purpose of this study was to demonstrate the use of a transrectal system that enables precise magnetic resonance (MR) image guidance and monitoring of prostate interventions. The system used a closed-bore 1.5-T MR imaging unit and enables one to take advantage of the higher signal-to-noise ratio achieved with traditional magnet designs, which is crucial for accurate targeting and monitoring of prostate interventions. In the first of the four canine studies, reliable needle placement, with all needles placed within 2 mm of the desired target site, was achieved. In two other studies, MR imaging was used to monitor distribution of injected contrast agent solution (gadopentetate dimeglumine mixed with trypan blue dye) in and around the prostate, thereby confirming that solution had been delivered to the desired tissue and also detecting faulty injections. In the final study, accurate placement and MR imaging of brachytherapy seeds in the prostate were demonstrated. The described system provides a flexible platform for a variety of minimally invasive MR image-guided therapeutic and diagnostic prostate interventions. © RSNA, 2003. %B RADIOLOGY %V 228 %P 886 - 894 %8 2003 %@ 0033-8419 %G eng %N 3 %! RADIOLOGY %0 Conference Paper %B 7th World Conference on Neutron Radiography (WCNR) %D 2002 %T Composition of Radiography Pictures of Whole Helicopter Rotor Blades in Hungary %A Márton Balaskó %A Zoltán Balaskó %A Emese Balogh %A Attila Tanacs %A Endre Katona %A Attila Kuba %B 7th World Conference on Neutron Radiography (WCNR) %P 637-642 %8 2002 %G eng %9 Conference paper %0 Journal Article %J ACADEMIC RADIOLOGY %D 2002 %T System for robotically assisted prostate biopsy and therapy with intraoperative CT guidance %X Rationale and Objectives. The purpose of this study was to assess the work-in-progress prototype of an image-guided, robotic system for accurate and consistent placement of transperineal needles into the prostate with intraoperative image guidance inside the gantry of a computed tomographic (CT) scanner. Materials and Methods. The coach-mounted system consists of a seven-degrees-of-freedom, passive mounting arm; a remote-center-of-motion robot; and a motorized, radiolucent needle-insertion device to deliver 17-18-gauge implant and biopsy needles into the prostate with the transperineal route. The robot is registered to the image space with a stereotactic adapter. The surgeon plans and controls the intervention in the CT scanner room with a desktop computer that receives DICOM images from the CT scanner. The complete system fits in a carry-on suitcase, does not need calibration, and does not utilize vendor-specific features of the CT scanner. Results. In open air, the average accuracy was better than 1 mm at a 5-8-cm depth. In various phantoms, the average orientation error was 1.3°, and the average distance between the needle tip and the target was 2 mm. Conclusion. Results of preliminary experiments indicate that this robotic system may be suitable for transperineal needle placement into the prostate and shows potential in a variety of other percutaneous clinical applications. %B ACADEMIC RADIOLOGY %V 9 %P 60 - 74 %8 2002 %@ 1076-6332 %G eng %N 1 %! ACAD RADIOL %0 Book Section %B Informatika a felsőoktatásban %D 2002 %T Számítógépes képfeldolgozás oktatása a Szegedi Tudományegyetemen %X A Szegedi Tudományegyetem tanterveiben 1993 óta szerepel aképfeldolgozás és alkalmazásainak oktatása. A tantárgy ez idő alatt sok változáson ment át. Jelenleg a Képfeldolgozás szakirányt választó hallgatók részesülnek ilyen képzésben. Az adott szakirányon belül különböző képfeldolgozási területek oktatása épül egymásra. Az oktatás során nem csak elméleti és gyakorlati ismereteket szerezhetnek a hallgatók, hanem néhány (főleg orvosi) alkalmazás is bemutatásra kerül. A kötelező jellegű tárgyak mellett speciálkollégiumok engednek bepillantást más kiegészítő területekre. A hallgatók a képfeldolgozás témával rendszeresen vesznek rész helyi és országos Tudományos DIákköri Konferenciákon. Az utóbbi időben sikerült a képfeldolgozásban érdekelt cégekkel felvenni a kapcsolatot, így évente több hallgató vehet részt ipari alkalmazások fejlesztésében. A doktori programon belül is meghirdetünk képfeldolgozáshoz kapcsolódó kutatási irányokat. Ezenkívül rendszeresen megrendezzük a nemzetközi Képfeldolgozó Nyári Iskolákat, ahol nemcsak Magyarországról, hanem a környező országokból is fogadunk hallgatókat és oktatókat. %B Informatika a felsőoktatásban %I Debreceni Egyetem %C Debrecen %P 750 - 757 %8 2002/// %G eng %0 Book Section %B MEDICAL IMAGE COMPUTING AND COMPUTER-ASSISTED INTERVENTION-MICCAI 2002, PT 1 %D 2002 %T Transrectal prostate biopsy inside closed MRI scanner with remote actuation, under real-time image guidance %X We present the proof-of-concept prototype of a prostate biopsyrobot to be used inside a conventional high-field MRI scanner. A three degree-of-freedom (DOF) mechanical device translates and rotates inside the rectum and enters a needle into the body, and steers the needle to a target point pre-selected by the user. The device is guided by real-time images from the scanner. Networked computers process the medical images and enable the clinician to control the motion of the mechanical device that is operated remotely from outside the imager. The system is also applicable to localized prostate therapy and also demonstrates potential in other intra-cavitary procedures. %B MEDICAL IMAGE COMPUTING AND COMPUTER-ASSISTED INTERVENTION-MICCAI 2002, PT 1 %I Springer Verlag %C Tokyo %P 91 - 98 %8 2002 %G eng %0 Journal Article %J ACTA CYBERNETICA-SZEGED %D 2001 %T Affine matching of two sets of points in arbitrary dimensions. %B ACTA CYBERNETICA-SZEGED %V 15 %P 101 - 106 %8 2001 %@ 0324-721X %G eng %N 1 %! ACTA CYBERN-SZEGED %0 Book Section %B Medical Image Computing and Computer-Assisted Intervention - MICCAI 2001, 4th International Conference %D 2001 %T Approximate Volumetric Reconstruction from Projected Images %B Medical Image Computing and Computer-Assisted Intervention - MICCAI 2001, 4th International Conference %I Springer Verlag %C Utrecht %P 1376 - 1378 %8 2001 %G eng %0 Journal Article %J LECTURE NOTES IN COMPUTER SCIENCE %D 2000 %T Point-based registration assuming affine motion %B LECTURE NOTES IN COMPUTER SCIENCE %V 1888 %P 329 - 338 %8 2000 %@ 0302-9743 %G eng %U http://www.inf.u-szeged.hu/ipcg/publications/papers/Tanacs_2000_AFPAC.pdf %! LECT NOTES COMPUT SCI %0 Conference Paper %B International Workshop on Biomedical Image Registration (WBIR) %D 1999 %T Target registration error of point-based methods assuming rigid-body and linear motions %B International Workshop on Biomedical Image Registration (WBIR) %I Slovenian Society of Informatics %C Ljubljana %P 223 - 233 %8 Aug 1999 %G eng %0 Journal Article %J MACHINE GRAPHICS AND VISION %D 1998 %T Medical image registration based on interactively identified anatomical landmark points %B MACHINE GRAPHICS AND VISION %V 7 %P 151 - 158 %8 1998/// %@ 1230-0535 %G eng %N 1/2 %! MACH GRAPH VIS %0 Journal Article %J MACHINE GRAPHICS AND VISION %D 1998 %T Medical image registration based on interactively identified anatomical landmark points %B MACHINE GRAPHICS AND VISION %V 7 %P 151 - 158 %8 1998 %@ 1230-0535 %G eng %N 1/2 %! MACH GRAPH VIS %0 Conference Paper %B XXI. Neumann Kollokvium kiadványa %D 1998 %T Pont alapú regisztráció, képfúzió %B XXI. Neumann Kollokvium kiadványa %I Neumann János Számítógép-tudományi Társaság %C Budapest %P 67 - 70 %8 Nov 1998 %G eng %0 Conference Paper %B XXI. Neumann Kollokvium kiadványa %D 1998 %T Pont alapú regisztráció, képfúzió %B XXI. Neumann Kollokvium kiadványa %I Neumann János Számítógép-tudományi Társaság %C Budapest %P 67 - 70 %8 Nov 1998 %G eng %0 Conference Paper %B Magyar Képfeldolgozók és Alakfelismerők Országos Konferenciája %D 1997 %T Orvosi képek regisztrációja interaktívan kijelölt anatómiai pontok alapján %B Magyar Képfeldolgozók és Alakfelismerők Országos Konferenciája %I Pannon Agrártudományi Egyetem Georgikon Mezőgazdaságtudományi Kar %C Keszthely %P 1 - 8 %8 Oct 1997 %G eng %0 Conference Paper %B Magyar Képfeldolgozók és Alakfelismerők Országos Konferenciája %D 1997 %T Orvosi képek regisztrációja interaktívan kijelölt anatómiai pontok alapján %B Magyar Képfeldolgozók és Alakfelismerők Országos Konferenciája %I Pannon Agrártudományi Egyetem Georgikon Mezőgazdaságtudományi Kar %C Keszthely %P 1 - 8 %8 Oct 1997 %G eng