Browsing by Author "Cavouras, Dionisis"
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- ItemDevelopment and evaluation of a PDA-based teleradiology terminal in thyroid nodule diagnosis.(2010-07-12) Ninos, Konstantinos; Spiros, Kostopoulos; Glotsos, Dimitris; Georgiadis, Pantelis; Sidiropoulos, Konstantinos; Dimitropoulos, Nikolaos; Kalatzis, Ioannis; Cavouras, DionisisWe developed a wireless personal digital assistant PDA based teleradiology terminal which allowed a secure connection to the hospital s Picture Archiving and Communication System PACS through the DICOM protocol Ten members of the hospital s medical staff completed a questionnaire about its mobility usability stability performance and diagnostic efficiency in a real health care environment There was a high degree of satisfaction with the system s mobility mean score 4 1 SD 1 0 on a five point scale usability mean score 4 2 SD 1 1 stability mean score 3 9 SD 0 4 and performance mean score 4 2 SD 0 6 The system was evaluated as a tool for providing assistance in diagnosing thyroid nodules from ultrasound images A total of 144 ultrasound images with thyroid nodules were assessed by an expert Six image quality attributes were evaluated The physician concluded that the ultrasound thyroid images on the PDA screen were of similar quality to those displayed on a diagnostic visual display unit screen However the expert found difficulties in diagnosing microcalcification internal echo texture and vascularity The PDA terminal provided rapid secure and convenient portable access to PACS images and the image quality was sufficient for diagnostic interpretation of ultrasound images of the thyroid
- ItemMobile consultant: combining total mobility with constant access.(2007-10-23) Banitsas, Konstantinos A; Georgiadis, Pantelis; Tachakra, Sapal; Cavouras, DionisisMinimizing the time required for a medical consultant to offer his her expert opinion can be viewed as a life saving procedure We have designed and tested an integrated system that will allow a medical consultant to freely move either within or outside the hospital while still maintaining constant contact with the patients via videoconferencing and high resolution imaging The above system is explained in this paper along with its advantages and its potential limitations Conclusively we demonstrate that such a system further increases the mobility of the medical consultant while improving the healthcare service
- ItemMobile consultant: evaluation of additional services.(2007-11-16) Banitsas, Konstantinos; Georgiadis, Pantelis; Tachakra, Sapal; Cavouras, DionisisAs the need for mobility in the medical world increases newer systems and applications came to light many of them based on wireless and mobile networks PDA based systems were presented in the past capable of videoconferencing and transmitting high quality images between a roaming consultant and a fixed point in the hospital These systems not only had desirable characteristics but also incorporated additional services that were found of value paging Voice over IP calling Internet email intranet patient record update etc This paper presents an engineering and clinical evaluation of those additional services based on both objective and subjective criteria It concludes that such complementary services can be desirable as they increase personnel mobility utilize the hospital resources more efficiently while at the same time increase productivity and decrease the cost of hardware and communications
- 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