Browsing by Author "Nikiforidis, George"
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- ItemCollaborative work during interventional radiological procedures based on a multicast satellite-terrestrial network.(2007-10-04) Gortzis, Lefteris G; Papadopoulos, Homer; Roelofs, Theo A; Rakowsky, Stefan; Karnabatidis, Dimitris; Siablis, Dimitris; Makropoulos, Constantinos; Nikiforidis, George; Graschew, GeorgiCollaboration is a key requirement in several contemporary interventional radiology procedures IRPs This work proposes a multicast hybrid satellite system capable of supporting advanced IRP collaboration and evaluates its feasibility and applicability Following a detailed IRP requirements study we have developed a system which supports IRP collaboration through the employment of a hybrid satellite terrestrial network a prototype multicast version of wavelet based interactive communication system WinVicos application and a partition aggregation and conditional coding PACC wavelet codec A semistructured questionnaire was also used to receive evaluative feedback from collaborating participants The departments of interventional radiology of University Hospital of Patras Greece and of Charite Hospital of Berlin Germany have been connected on the system Eight interventional radiologists and a vascular surgeon participated periodically in three satellite terrestrial fully collaborative IRPs average time 90 min of high complexity and in four terrestrial educational sessions with great success evidenced by considerable improving the IRP outcomes clinical and educational In case of high complexity where the simultaneous presence of remote interventional expert and or surgeon is required advanced collaboration among staff of geographically dispersed international centers is feasible via integration of existing networking and other technologies
- ItemPDA-based system with teleradiology and image analysis capabilities.(2007-11-16) Georgiadis, Pantelis; Cavouras, Dionisis; Daskalakis, Antonis; Sifaki, Koralia; Malamas, Menelaos; Nikiforidis, George; Solomou, EkateriniThe aim of the present study was to design and implement a Personal Digital Assistant PDA based teleradiology system incorporating image processing and analysis facilities for use in emergency situations within a hospital environment The system comprised a DICOM server connected to an MRI unit 3 wireless access points and 3 PDAs HP iPaq rx3715 PDA application software was developed in MS Embedded Visual C 4 0 Each PDA can receive load process and analyze hi quality static MR images Image processing includes gray scale manipulation and spatial filtering techniques while image analysis incorporates a probabilistic neural network PNN classifier which was optimally designed employing a suitable combination of textural features and was evaluated using the leave one out method The PNN is capable of discriminating between three major types of human brain tumors with accuracy of 86 66 The developed application may be useful as a mobile medical teleconsultation tool
- ItemTele-diagnostic and therapeutic guidance in urology.(2004-12-15) Liatsikos, Evangelos N; Gortzis, Lefteris; Nikiforidis, George; Barbalias, George ATo design a Web based network for diagnostic and therapeutic guidance in urology