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Spyrou, G.; Panayiotakis, G.; Bakas, A.; Tzanakos, G.
Proceedings of the 8. Mediterranean Conference on Medical and Biological Engineering and Computing (Medicon '98)1998
Proceedings of the 8. Mediterranean Conference on Medical and Biological Engineering and Computing (Medicon '98)1998
AbstractAbstract
[en] A software package using Monte Carlo methods has been developed for the simulation of x-ray mammography. A simplified geometry of the mammographic apparatus has been considered along with the software phantom of compressed breast. This phantom may contain inhomogeneities of various compositions and sizes at any point. Using this model one can produce simulated mammograms. Results that demonstrate the validity of this simulation are presented. (authors)
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Christofides, Stelios; Pattichis, Constantinos; Schizas, Christos; Keravnou-Papailiou, Elpida; Kaplanis, Prodromos; Spyros, Spyrou; Christodoulides, George; Theodoulou, Yiannis (eds.); Cyprus Association of Medical Physics and Biomedical Engineering (CAMPBE), Nicosia (Cyprus); The Department of Computer Science, University of Cyprus, Nicosia (Cyprus); 220 p; ISBN 9963-607-14-4;
; 1998; p. 70; 8. Mediterranean Conference on Medical and Biological Engineering and Computing (Medicon '98); Lemesos (Cyprus); 14-17 Jun 1998; 16 refs, 4 figs

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Saro, J.P.; Bula-Cruz, J.; Rafael, J.A.; Botelho, M.F.; Lima, J.P.
Proceedings of the 8. Mediterranean Conference on Medical and Biological Engineering and Computing (Medicon '98)1998
Proceedings of the 8. Mediterranean Conference on Medical and Biological Engineering and Computing (Medicon '98)1998
AbstractAbstract
[en] The paper describes a non invasive methodology for the measurement of blood speed in the pulmonary artery trunk. The methodology has been tested with a moving radioactive tracer (nuclear medicine). An image processing technique is proposed, for detection and analysis of a moving object with variable shape and intensity over time (radioactive bolus). Experiments on the application of the technique in nuclear medicine are critically analysed. (authors)
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Christofides, Stelios; Pattichis, Constantinos; Schizas, Christos; Keravnou-Papailiou, Elpida; Kaplanis, Prodromos; Spyros, Spyrou; Christodoulides, George; Theodoulou, Yiannis (eds.); Cyprus Association of Medical Physics and Biomedical Engineering (CAMPBE), Nicosia (Cyprus); The Department of Computer Science, University of Cyprus, Nicosia (Cyprus); 220 p; ISBN 9963-607-14-4;
; 1998; p. 116; 8. Mediterranean Conference on Medical and Biological Engineering and Computing (Medicon '98); Lemesos (Cyprus); 14-17 Jun 1998; 9 refs., 7 figs.

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Ikonomidou, Vasiliki N.; Sergiadis, George D.
Proceedings of the 8. Mediterranean Conference on Medical and Biological Engineering and Computing (Medicon '98)1998
Proceedings of the 8. Mediterranean Conference on Medical and Biological Engineering and Computing (Medicon '98)1998
AbstractAbstract
[en] Selective excitation pulses are widely used in magnetic resonance imaging to excite only a specific region (slice) within the body of interest. Recently, a design algorithm has been developed than provides a direct solution to the generally nonlinear problem. However, as is the case in all differential problems, the result of the excitation is strongly dependent on the initial conditions. In this paper, we will show that when the magnetization is not initially at rest, the result of the radiofrequency pulse provokes a sinusoidal ripple depending on the excitation angle and the selection gradient. However, thus providing a second coding mechanism, that can be used to provide a general technique resulting in a uniform excitation
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Christofides, Stelios; Pattichis, Constantinos; Schizas, Christos; Keravnou-Papailiou, Elpida; Kaplanis, Prodromos; Spyros, Spyrou; Christodoulides, George; Theodoulou, Yiannis (eds.); Cyprus Association of Medical Physics and Biomedical Engineering (CAMPBE), Nicosia (Cyprus); The Department of Computer Science, University of Cyprus, Nicosia (Cyprus); 220 p; ISBN 9963-607-14-4;
; 1998; p. 117; 8. Mediterranean Conference on Medical and Biological Engineering and Computing (Medicon '98); Lemesos (Cyprus); 14-17 Jun 1998; 5 refs., 5 figs.

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Christofides, Stelios; Pattichis, Constantinos; Schizas, Christos; Keravnou-Papailiou, Elpida; Kaplanis, Prodromos; Spyros, Spyrou; Christodoulides, George; Theodoulou, Yiannis
Cyprus Association of Medical Physics and Biomedical Engineering (CAMPBE), Nicosia (Cyprus); The Department of Computer Science, University of Cyprus, Nicosia (Cyprus)1998
Cyprus Association of Medical Physics and Biomedical Engineering (CAMPBE), Nicosia (Cyprus); The Department of Computer Science, University of Cyprus, Nicosia (Cyprus)1998
AbstractAbstract
[en] Medicon '98 is the eighth in the series of regional meetings of the International Federation of Medical and Biological Engineering (IFMBE) in the Mediterranean. The goal of Medicon '98 is to provide updated information on the state of the art on medical and biological engineering and computing. Medicon '98 was held in Lemesos, Cyprus, between 14-17 June, 1998. The full papers of the proceedings were published on CD and consisted of 190 invited and submitted papers. A book of abstracts was also published in paper form and was available to all the participants. Twenty seven papers fall within the scope of INIS and are dealing with Nuclear Medicine,Computerized Tomography, Radiology, Radiotherapy, Magnetic Resonance Imaging and Personnel Dosimetry (eds)
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1998; 220 p; 8. Mediterranean Conference on Medical and Biological Engineering and Computing (Medicon '98); Lemesos (Cyprus); 14-17 Jun 1998; ISBN 9963-607-14-4;
; The proceedings of this meeting are available on CD-ROM in PDF, at the price of US$50, from the Cyprus Association of Medical Physics and Biomedical Engineering, P.O.Box 24039, 1700 Nicosia, Cyprus. The CD-ROM makes use of Abode Acrobat PDF (Portable Document Format). To read the files the Abode Acrobat reader has to be installed on your system. A copy is provided with the CD-ROM.

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Kaplanis, Prodromos A.; Christofides, Stelios
Proceedings of the 8. Mediterranean Conference on Medical and Biological Engineering and Computing (Medicon '98)1998
Proceedings of the 8. Mediterranean Conference on Medical and Biological Engineering and Computing (Medicon '98)1998
AbstractAbstract
[en] For the first time ever the occupational radiation exposure data of all the radiation workers of Cyprus, as obtained by the personnel monitoring service of the Dosimetry Laboratory of the Medical Physics Department of the Ministry of Health, is published and compared with that of other countries. The presented data shows a systematic trend of improvement both with regards to the methodology of monitoring and data recording. The efforts of the past few years in educating and training the users of ionising radiation with regards to the importance of the personnel monitoring service and the hazards of ionising radiation, has paid off and this is evident from the doses recorded in the past three years which are compared favourably with those of other countries, as given by the UNSCEAR 1993 report. The introduction of extremity monitoring, promises even better improvement in the methodology of monitoring the doses received by personnel working in Interventional Radiology, as well as other groups whose hands, unavoidably, come close to radiation sources. (authors)
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Christofides, Stelios; Pattichis, Constantinos; Schizas, Christos; Keravnou-Papailiou, Elpida; Kaplanis, Prodromos; Spyros, Spyrou; Christodoulides, George; Theodoulou, Yiannis (eds.); Cyprus Association of Medical Physics and Biomedical Engineering (CAMPBE), Nicosia (Cyprus); The Department of Computer Science, University of Cyprus, Nicosia (Cyprus); 220 p; ISBN 9963-607-14-4;
; 1998; p. 148; 8. Mediterranean Conference on Medical and Biological Engineering and Computing (Medicon '98); Lemesos (Cyprus); 14-17 Jun 1998; 3 refs., 12 tabs.

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Bajla, Ivan; Hollander, Igor
Proceedings of the 8. Mediterranean Conference on Medical and Biological Engineering and Computing (Medicon '98)1998
Proceedings of the 8. Mediterranean Conference on Medical and Biological Engineering and Computing (Medicon '98)1998
AbstractAbstract
[en] A novel method of local adapting of the conductance using a pixel dissimilarity measure is developed. An alternative processing methodology is proposed, which is based on intensity gradient histogram calculated for region interiors and boundaries of a phantom which models real MR brain scans. It involves a specific cost function suitable for the calculation of the optimum relaxation parameter Kopt and for the selection of the optimal exponential conductance. Computer experiments for locally adaptive geometry-driven-diffusion filtering of an MR brain phantom have been performed and evaluated. (authors)
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Christofides, Stelios; Pattichis, Constantinos; Schizas, Christos; Keravnou-Papailiou, Elpida; Kaplanis, Prodromos; Spyros, Spyrou; Christodoulides, George; Theodoulou, Yiannis (eds.); Cyprus Association of Medical Physics and Biomedical Engineering (CAMPBE), Nicosia (Cyprus); The Department of Computer Science, University of Cyprus, Nicosia (Cyprus); 220 p; ISBN 9963-607-14-4;
; 1998; p. 118; 8. Mediterranean Conference on Medical and Biological Engineering and Computing (Medicon '98); Lemesos (Cyprus); 14-17 Jun 1998; 6 refs., 3 figs.2 tabs.

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Lyra, M.; Skouroliakou, K.; Emmanouilides, I.; Stratis, I.
Proceedings of the 8. Mediterranean Conference on Medical and Biological Engineering and Computing (Medicon '98)1998
Proceedings of the 8. Mediterranean Conference on Medical and Biological Engineering and Computing (Medicon '98)1998
AbstractAbstract
[en] The evaluation of cortical damage to the kidneys, especially in children, is currently performed by means of Tc99m-DMSA renal scan. The routine involves the acquisition of planar images and their qualitative and quantitative evaluation. Many studies have dealt with the possible advantage that SPECT could possess on qualitative criteria. This study attempts to quantitatively deal with the issue by the calculation of an index. The results exhibit a clear advantage of tomographic and 3D reconstructed images over the conventional planar ones. (authors)
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Christofides, Stelios; Pattichis, Constantinos; Schizas, Christos; Keravnou-Papailiou, Elpida; Kaplanis, Prodromos; Spyros, Spyrou; Christodoulides, George; Theodoulou, Yiannis (eds.); Cyprus Association of Medical Physics and Biomedical Engineering (CAMPBE), Nicosia (Cyprus); The Department of Computer Science, University of Cyprus, Nicosia (Cyprus); 220 p; ISBN 9963-607-14-4;
; 1998; p. 116; 8. Mediterranean Conference on Medical and Biological Engineering and Computing (Medicon '98); Lemesos (Cyprus); 14-17 Jun 1998; 14 refs., 3 figs., 1 tabs.

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Pappous, George; Kolitsi, Zoi; Pallikarakis, Nikolas; Arvanitakis, Gerasimos
Proceedings of the 8. Mediterranean Conference on Medical and Biological Engineering and Computing (Medicon '98)1998
Proceedings of the 8. Mediterranean Conference on Medical and Biological Engineering and Computing (Medicon '98)1998
AbstractAbstract
[en] Quality Control (QC) performed on 99 intraoral dental X-Ray units, installed in equal in number dental offices, at the Achaia prefecture, a region of south west Greece. The QC procedure includes collection of general information, radiation safety checks, beam qualitative and quantitative characteristic checks, and film processing checks, according to international established protocols. The collected data are characterised by a non-uniformity and in some cases indicate a poor performance level. The results of the study on a representative sample of dental X-Ray units helps to map the existing situation and may be useful in the reviewing and optimisation of the applied process. (authors)
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Christofides, Stelios; Pattichis, Constantinos; Schizas, Christos; Keravnou-Papailiou, Elpida; Kaplanis, Prodromos; Spyros, Spyrou; Christodoulides, George; Theodoulou, Yiannis (eds.); Cyprus Association of Medical Physics and Biomedical Engineering (CAMPBE), Nicosia (Cyprus); The Department of Computer Science, University of Cyprus, Nicosia (Cyprus); 220 p; ISBN 9963-607-14-4;
; 1998; p. 148; 8. Mediterranean Conference on Medical and Biological Engineering and Computing (Medicon '98); Lemesos (Cyprus); 14-17 Jun 1998; 10 refs., 11 figs.

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Ruggiero, C.; Giacomini, M.; Sacile, R.; Rosselli Del Turco, M.
Proceedings of the 8. Mediterranean Conference on Medical and Biological Engineering and Computing (Medicon '98)1998
Proceedings of the 8. Mediterranean Conference on Medical and Biological Engineering and Computing (Medicon '98)1998
AbstractAbstract
[en] A method is presented for rapid detection of suspicious regions which consists of two steps. The first step is segmentation based on texture analysis consisting of : histogram equalization, Laws filtering for texture analysis, Gaussian blur and median filtering to enhance differences between tissues in different respects, histogram thresholding to obtain a binary image, logical masking in order to detect regions to be discarded from the analysis, edge detection. This method has been tested on 60 images, obtaining 93% successful detection of suspicious regions. (authors)
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Christofides, Stelios; Pattichis, Constantinos; Schizas, Christos; Keravnou-Papailiou, Elpida; Kaplanis, Prodromos; Spyros, Spyrou; Christodoulides, George; Theodoulou, Yiannis (eds.); Cyprus Association of Medical Physics and Biomedical Engineering (CAMPBE), Nicosia (Cyprus); The Department of Computer Science, University of Cyprus, Nicosia (Cyprus); 220 p; ISBN 9963-607-14-4;
; 1998; p. 71; 8. Mediterranean Conference on Medical and Biological Engineering and Computing (Medicon '98); Lemesos (Cyprus); 14-17 Jun 1998; 4 refs, 9 figs, 1 tabs.

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Bogorodski, Piotr; Wolek, Tomasz; Wasielewski, Jaroslaw; Piatkowski, Adam
Proceedings of the 8. Mediterranean Conference on Medical and Biological Engineering and Computing (Medicon '98)1998
Proceedings of the 8. Mediterranean Conference on Medical and Biological Engineering and Computing (Medicon '98)1998
AbstractAbstract
[en] A novel method for functional image evaluation from image set obtained in contrast aided Ultrafast Computed Tomography and Magnetic Resonance Imaging will be presented. The method converts temporal set of images of first-pass transit of injected contrast, to a single parametric image. The main difference between proposed procedure and other widely accepted methods is fast, that our method applies correlation and discrimination analysis to each concentration-time curve, instead of fitting them to the given a priori tracer kinetics model. A stress will be put on execution speed (i.e. shortening of the time required to obtain a perfusion relevant image), and easiest user interface allowing the physician to utilize the system without any technical assistance. Both execution speed and user interface should satisfy requirements in the interventional procedures. (authors)
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Christofides, Stelios; Pattichis, Constantinos; Schizas, Christos; Keravnou-Papailiou, Elpida; Kaplanis, Prodromos; Spyros, Spyrou; Christodoulides, George; Theodoulou, Yiannis (eds.); Cyprus Association of Medical Physics and Biomedical Engineering (CAMPBE), Nicosia (Cyprus); The Department of Computer Science, University of Cyprus, Nicosia (Cyprus); 220 p; ISBN 9963-607-14-4;
; 1998; p. 119; 8. Mediterranean Conference on Medical and Biological Engineering and Computing (Medicon '98); Lemesos (Cyprus); 14-17 Jun 1998

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