%0 Conference Paper %B International Conference on Computer Assisted Radiology and Surgery (CARS) %D 2011 %T Value of virtual fracture reduction exemplified in CT data of pilon fractures %A Balázs Erdőhelyi %A Lukas Kamer %B International Conference on Computer Assisted Radiology and Surgery (CARS) %I Springer-Verlag %P 108 - 116 %8 June 2011 %G eng %9 Conference paper %0 Generic %D 2010 %T Angular Stable Locking System. Milestone in IM nailing? ASLS %A Endre Varga %A Balázs Erdőhelyi %8 2010/// %G eng %0 Journal Article %J OTKA MAGAZIN %D 2010 %T Műtétek tervezése számítógéppel %A Endre Varga %A Balázs Erdőhelyi %B OTKA MAGAZIN %P 38 - 40 %8 2010 %G eng %! OTKA MAGAZIN %0 Generic %D 2010 %T TraumArt:a computer assisted planning system for orthopedic-trauma %A Endre Varga %A Balázs Erdőhelyi %8 2010/// %G eng %0 Conference Paper %B International Conference on Computer Assisted Radiology and Surgery (CARS) %D 2009 %T Semi-automatic bone fracture reduction in surgical planning %A Balázs Erdőhelyi %A Endre Varga %X

The surgical intervention of complex bone fractures has to be planned very carefully, especially for such a complex region as the pelvic ring. The computer aided surgical planning is done before the actual surgery takes place and its main purpose is to gather more information about the dislocation of the bone fragments and to arrange the surgical implants to be inserted. With the help of finite element analysis even the biomechanical stability of the whole plan can be predicted. To create such a plan the following steps are performed. First, the CT dataset of the patient is segmented [1], which enables us to treat the different bones and broken fragments separately. Next the surface of this volumetric dataset is determined [2] and presented in a 3D environment. Since the fragments may have moved during the fracture, it is essential to move and rotate them back to their original anatomic position. Without this reduction, no implants can be inserted, since the final locations of the fragments are unknown. Previous solutions to the fracture reduction problem included moving the fragments with the mouse, or a special 3D haptic device. The former is not intuitive to use since the mouse is only 2D, and the later is expensive and still requires learning.

%B International Conference on Computer Assisted Radiology and Surgery (CARS) %I Springer Verlag %C Berlin, Germany %V 4 %P S98-S99 %G eng %9 Conference Paper %R 10.1007/s11548-009-0314-1 %0 Generic %D 2009 %T VCP volar approach %A Endre Varga %A Balázs Erdőhelyi %8 2009/// %G eng %0 Journal Article %J JOURNAL OF CRANIO-MAXILLOFACIAL SURGERY %D 2008 %T Finite element analysis of mandible virtual model %A Endre Varga %A Zoltán Raskó %A Balázs Erdőhelyi %A L Seres %A J Piffko %B JOURNAL OF CRANIO-MAXILLOFACIAL SURGERY %I Elsevier %V 36 %P S204 %8 2008 %@ 1010-5182 %G eng %N Suppl 1 %9 Journal article %! J CRANIO MAXILL SURG %R 10.1016/S1010-5182(08)71931-0 %0 Book Section %B Informatika a felsőoktatásban 2008 %D 2008 %T A képfeldolgozás kutatása a Szegedi Tudományegyetemen %A Péter Balázs %A Balázs Erdőhelyi %A Endre Katona %A Zoltan Kato %A Eörs Máté %A Antal Nagy %A László Gábor Nyúl %A Kálmán Palágyi %A Attila Tanacs %E Attila Pethő %E Miklós Herdon %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 Generic %D 2008 %T Virtual Planning Tool for Surgical Planning %A Endre Varga %A Balázs Erdőhelyi %8 2008/// %G eng %0 Conference Paper %B International Conference on Computer Assisted Radiology and Surgery (CARS) %D 2007 %T Surgical Planning Tool with Biomechanical Simulation %A Balázs Erdőhelyi %A Endre Varga %A Attila Kuba %X

The fixation of fractured bones often needs a very careful decision making. The operation has to be designed very carefully. A computer assisted system can help the surgeon in the planning phase to increase surgical accuracy. This paper introduces a software tool to plan a surgical intervention and to calculate the biomechanical stability of the plan. The proposed system provides 3D movement and rotation of the bone fragments and the insertion of fixation screws and plates. Finite element analysis is used to calculate mechanical stability of the surgical plan. Using these results the surgeon is able to see the week points of the fixation before the surgery. He can even try several surgical plans to pick the most promising one.

%B International Conference on Computer Assisted Radiology and Surgery (CARS) %I Springer %C Berlin, Germany %V 2 %P S262-S263 %G eng %9 Conference Paper %6 Suppl. 1 %R 10.1007/s11548-007-0098-0 %0 Generic %D 2006 %T Az arc- állcsontok biomechanikai tulajdonságai %A Endre Varga %A Zoltán Raskó %A Balázs Erdőhelyi %A Attila Kuba %A K Nagy %8 2006/// %G eng %0 Generic %D 2006 %T Computer Aided Surgical Planning %A Endre Varga %A Balázs Erdőhelyi %A Attila Kuba %8 2006/// %G eng %0 Journal Article %J ACTA CYBERNETICA-SZEGED %D 2006 %T MedEdit: A Computer Assisted Image Processing and Navigation System for Orthopedic Trauma Surgery %A Endre Varga %A Krisztián Ollé %A Balázs Erdőhelyi %A Attila Kuba %B ACTA CYBERNETICA-SZEGED %V 17 %P 589 - 603 %8 2006/// %@ 0324-721X %G eng %! ACTA CYBERN-SZEGED %0 Generic %D 2006 %T MedEdit Orvosi Képfeldolgozó rendszer használata a mindennapi orvosi gyakorlatban %A Endre Varga %A Balázs Erdőhelyi %A Krisztián Ollé %A Attila Kuba %8 2006/// %G eng %0 Generic %D 2006 %T Műtéti tervek biomechanikai analízise %A Endre Varga %A Balázs Erdőhelyi %A Krisztián Ollé %A Attila Kuba %8 2006/// %G eng %0 Generic %D 2006 %T Surgical Planning and Biomechanical Analysis %A Endre Varga %A Balázs Erdőhelyi %A Attila Kuba %8 2006/// %G eng %0 Generic %D 2005 %T Medence- és Acetabulum-törések Baleseti Mechanizmusainak Animálása MedEdit ® Orvosi Képfeldolgozó Rendszer Segítségével %A Endre Varga %A Balázs Erdőhelyi %A Krisztián Ollé %A Csongor Halmai %A Attila Kuba %8 2005/// %G eng %0 Generic %D 2004 %T Comparision of Pennig Ex.Fix. and palmar plating with FEA, in radius (A3) fractures %A Endre Varga %A Balázs Erdőhelyi %A Krisztián Ollé %A Attila Kuba %A J A Simonka %8 2004/// %G eng %0 Journal Article %J MAGYAR TRAUMATOLÓGIA ORTOPÉDIA KÉZSEBÉSZET PLASZTIKAI SEBÉSZET %D 2004 %T Comparision of Pennig Ex.Fix. and palmar plating with FEA, in radius (A3) fractures %A Endre Varga %A Balázs Erdőhelyi %A Krisztián Ollé %A Attila Kuba %A J A Simonka %B MAGYAR TRAUMATOLÓGIA ORTOPÉDIA KÉZSEBÉSZET PLASZTIKAI SEBÉSZET %V 4 %P 224 %8 2004/// %@ 1217-3231 %G eng %! MAGYAR TRAUMATOLÓGIA ORTOPÉDIA KÉZSEBÉSZET PLASZTIKAI SEBÉSZET %0 Generic %D 2004 %T Comparision of Synthes Hybrid Ex.Fix. and double plating in tibial fractures %A Endre Varga %A Balázs Erdőhelyi %A Krisztián Ollé %A Zs Balogh %A Attila Kuba %A J A Simonka %8 2004/// %G eng %0 Generic %D 2004 %T Computer Assisted Image Processing and Navigation System for Orthopedic-Trauma Surgery %A Endre Varga %A Krisztián Ollé %A Balázs Erdőhelyi %A György Bekes %A Krisztina Maróti %A Attila Kuba %8 2004/// %G eng %0 Generic %D 2004 %T MedEdit: A Computer Assisted Planning and Simulation System for Orthopedic-Trauma Surgery %A Endre Varga %A Krisztián Ollé %A Balázs Erdőhelyi %A Csongor Halmai %A Attila Kuba %8 2004/// %G eng %0 Generic %D 2004 %T MedEdit: A Computer Assisted Planning system for Orthopedic-Trauma Surgery %A Endre Varga %A Balázs Erdőhelyi %A Krisztián Ollé %A Zs Balogh %A Attila Kuba %A J A Simonka %8 2004/// %G eng %0 Generic %D 2004 %T MedEdit műtéti tervezést segítő orvosi képfeldolgozó rendszer %A Endre Varga %A Krisztián Ollé %A Balázs Erdőhelyi %A Csongor Halmai %A Attila Kuba %8 2004/// %G eng %0 Generic %D 2004 %T MedEdit. Orvosi Képfeldolgozó és Műtéti Tervező/Elemző Rendszer %A Endre Varga %A Balázs Erdőhelyi %A Krisztián Ollé %A Krisztina Maróti %A György Bekes %A Attila Kuba %8 2004/// %G eng %0 Generic %D 2004 %T MedEditÉ Orvosi képfeldolgozó, tervező/elemző és tervező rendszer %A Endre Varga %A Krisztián Ollé %A Balázs Erdőhelyi %A Krisztina Maróti %A György Bekes %A Attila Kuba %8 2004/// %G eng %0 Generic %D 2004 %T MedEditÉ Orvosi tervező és okatási rendszer %A Endre Varga %A Krisztián Ollé %A Balázs Erdőhelyi %A Krisztina Maróti %A György Bekes %A Attila Kuba %8 2004/// %G eng %0 Generic %D 2004 %T Műtéti tervek előkészítése véges elemes analízishez a MedEdit orvosi képfeldolgozó rendszer segítségével %A Endre Varga %A Balázs Erdőhelyi %A Krisztián Ollé %A Csongor Halmai %A Attila Kuba %8 2004/// %G eng %0 Generic %D 2004 %T Preparing Surgical Operation Plans for Finite Element Analysis Using the MedEdit System %A Endre Varga %A Balázs Erdőhelyi %A Krisztián Ollé %A Attila Kuba %8 2004/// %G eng %0 Journal Article %J RADIOLOGE %D 2003 %T 3D cross section of the laryngotracheal tract. A new method for visualization and quantification of tracheal stenoses %A Erich Sorantin %A Csongor Halmai %A Balázs Erdőhelyi %A Kálmán Palágyi %A László Gábor Nyúl %A Krisztián Ollé %A Franz Lindbichler %A Gerhard Friedrich %A Karl Kiesler %X PURPOSE: Demonstration of a technique for 3D assessment oftracheal stenoses, regarding site, length and degree, based on spiral computed tomography (S-CT). PATIENTS AND METHODS: S-CT scanning and automated segmentation of the laryngo-tracheal tract (LTT) was followed by the extraction of the LTT medial axis using a skeletonisation algorithm. Orthogonal to the medial axis the LTT 3D cross sectional profile was computed and presented as line charts, where degree and length were obtained. Values for both parameters were compared between 36 patients and 18 normal controls separately. Accuracy and precision was derived from 17 phantom studies. RESULTS: Average degree and length of tracheal stenoses were found to be 60.5% and 4.32 cm in patients compared to minor caliber changes of 8.8% and 2.31 cm in normal controls (p <0.005). For the phantoms an excellent correlation between the true and computed 3D cross sectional profile was found (p <0.005) and an accuracy for length and degree measurements of 2.14 mm and 2.53% respectively could be determined. The corresponding figures for the precision were found to be 0.92 mm and 2.56%. CONCLUSION: LTT 3D cross sectional profiles permit objective, accurate and precise assessment of LTT caliber changes. Minor LTT caliber changes can be observed even in normals and, in case of an otherwise normal S-CT study, can be regarded as artefacts. %B RADIOLOGE %V 43 %P 1056 - 1068 %8 2003/// %@ 0033-832X %G eng %N 12 %! RADIOLOGE %0 Journal Article %J RADIOLOGE %D 2003 %T 3D cross section of the laryngotracheal tract. A new method for visualization and quantification of tracheal stenoses %A Erich Sorantin %A Csongor Halmai %A Balázs Erdőhelyi %A Kálmán Palágyi %A László Gábor Nyúl %A Krisztián Ollé %A Franz Lindbichler %A Gerhard Friedrich %A Karl Kiesler %X PURPOSE: Demonstration of a technique for 3D assessment oftracheal stenoses, regarding site, length and degree, based on spiral computed tomography (S-CT). PATIENTS AND METHODS: S-CT scanning and automated segmentation of the laryngo-tracheal tract (LTT) was followed by the extraction of the LTT medial axis using a skeletonisation algorithm. Orthogonal to the medial axis the LTT 3D cross sectional profile was computed and presented as line charts, where degree and length were obtained. Values for both parameters were compared between 36 patients and 18 normal controls separately. Accuracy and precision was derived from 17 phantom studies. RESULTS: Average degree and length of tracheal stenoses were found to be 60.5% and 4.32 cm in patients compared to minor caliber changes of 8.8% and 2.31 cm in normal controls (p <0.005). For the phantoms an excellent correlation between the true and computed 3D cross sectional profile was found (p <0.005) and an accuracy for length and degree measurements of 2.14 mm and 2.53% respectively could be determined. The corresponding figures for the precision were found to be 0.92 mm and 2.56%. CONCLUSION: LTT 3D cross sectional profiles permit objective, accurate and precise assessment of LTT caliber changes. Minor LTT caliber changes can be observed even in normals and, in case of an otherwise normal S-CT study, can be regarded as artefacts. %B RADIOLOGE %V 43 %P 1056 - 1068 %8 2003/// %@ 0033-832X %G eng %N 12 %! RADIOLOGE %0 Journal Article %J Der Radiologe %D 2003 %T 3D-Querschnittsprofil des Laryngotrachealtrakts—Eine neue Methode zur Visualisierung und Quantifizierung von Trachealstenosen %A Sorantin, Erich. %A Halmai, Csongor. %A Balázs Erdőhelyi %A Kálmán Palágyi %A László Gábor Nyúl %A Ollé, Krisztián. %A Geiger, B. %A Lindbichler, F. %A Friedrich, G. %A Kiesler, K. %X

Purpose

Demonstration of a technique for 3D assessment of tracheal stenoses, regarding site, length and degree, based on spiral computed tomography (S-CT).

Patients and Methods

S-CT scanning and automated segmentation of the laryngo-tracheal tract (LTT) was followed by the extraction of the LTT medial axis using a skeletonisation algorithm. Orthogonal to the medial axis the LTT 3D cross sectional profile was computed and presented as line charts, where degree and length were obtained. Values for both parameters were compared between 36 patients and 18 normal controls separately. Accuracy and precision was derived from 17 phantom studies.

Results

Average degree and length of tracheal stenoses were found to be 60.5% and 4.32 cm in patients compared to minor caliber changes of 8.8% and 2.31 cm in normal controls (p <0.005). For the phantoms an excellent correlation between the true and computed 3D cross sectional profile was found (p <0.005) and an accuray for length and degree measurements of 2.14 mm and 2.53% respectively could be determined. The corresponding figures for the precision were found to be 0.92 mm and 2.56%.

Conclusion

LTT 3D cross sectional profiles permit objective, accurate and precise assessment of LTT caliber changes. Minor LTT caliber changes can be observed even in normals and, in case of an otherwise normal S-CT study, can be regarded as artefacts.

 

%B Der Radiologe %I Springer-Verlag %V 43 %P 1056-1068 %8 2003 %G eng %U http://dx.doi.org/10.1007/s00117-003-0990-8 %9 Journal Article %R 10.1007/s00117-003-0990-8 %0 Journal Article %J IEEE TRANSACTIONS ON MEDICAL IMAGING %D 2002 %T Spiral-CT-based assessment of tracheal stenoses using 3-D-skeletonization %A Erich Sorantin %A Csongor Halmai %A Balázs Erdőhelyi %A Kálmán Palágyi %A László Gábor Nyúl %A Krisztián Ollé %A Bernhard Geiger %A Franz Lindbichler %A Gerhard Friedrich %A Karl Kiesler %X PURPOSE: Demonstration of a technique for three-dimensional (3-D) assessment of tracheal-stenoses, regarding site, length and degree, based on spiral computed tomography (S-CT). PATIENTS AND METHODS: S-CT scanning and automated segmentation of the laryngo-tracheal tract (LTT) was followed by the extraction of the LTT medial axis using a skeletonization algorithm. Orthogonal to the medial axis the LTT 3-D cross-sectional profile was computed and presented as line charts, where degree and length was obtained. Values for both parameters were compared between 36 patients and 18 normal controls separately. Accuracy and precision was derived from 17 phantom studies. RESULTS: Average degree and length of tracheal stenoses was found to be 60.5% and 4.32 cm in patients compared with minor caliber changes of 8.8% and 2.31 cm in normal controls (p << 0.0001). For the phantoms an excellent correlation between the true and computed 3-D cross-sectional profile was found (p << 0.005) and an accuracy for length and degree measurements of 2.14 mm and 2.53% respectively could be determined. The corresponding figures for the precision were found to be 0.92 mm and 2.56%. CONCLUSION: LTT 3-D cross-sectional profiles permit objective, accurate and precise assessment of LTT caliber changes. Minor LTT caliber changes can be observed even in normals and, in case of an otherwise normal S-CT study, can be regarded as artifacts. %B IEEE TRANSACTIONS ON MEDICAL IMAGING %V 21 %P 263 - 273 %8 2002/// %@ 0278-0062 %G eng %N 3 %! IEEE T MED IMAGING %0 Journal Article %J LECTURE NOTES IN COMPUTER SCIENCE %D 2001 %T A sequential 3D thinning algorithm and its medical applications %A Kálmán Palágyi %A Erich Sorantin %A Emese Balogh %A Attila Kuba %A Csongor Halmai %A Balázs Erdőhelyi %A Klaus Hausegger %B LECTURE NOTES IN COMPUTER SCIENCE %V 2082 %P 409 - 415 %8 2001/// %@ 0302-9743 %G eng %U http://www.springerlink.com/content/py49qu0e434n0n16 %! LECT NOTES COMPUT SCI %0 Conference Paper %B A Képfeldolgozók és Alakfelismerők Társaságának konferenciája - KÉPAF 2000 %D 2000 %T 3D vékonyítás és alkalmazása vérerek és légutak átmérőjének meghatározására %A Kálmán Palágyi %A Erich Sorantin %A Csongor Halmai %A Balázs Erdőhelyi %A László Martonossy %A Attila Kuba %E Tamas Sziranyi %B A Képfeldolgozók és Alakfelismerők Társaságának konferenciája - KÉPAF 2000 %I NJSZT %C Noszvaj %P 95 - 100 %8 Jan 2000 %G eng %0 Book Section %B Digital (R)Evolution in Radiology %D 2000 %T New advances for imaging of laryngotracheal stenosis by post processing of spiral-CT data %A Erich Sorantin %A Csongor Halmai %A Balázs Erdőhelyi %A László Martonossy %A Kálmán Palágyi %A Bernhard Geiger %E Walter Hruby %B Digital (R)Evolution in Radiology %I Springer-Verlag %C Berlin; Heidelberg; New York; London; Paris; Tokyo %P 275 - 285 %8 2000/// %G eng