Pub Date : 1992-10-01DOI: 10.1109/IEMBS.1992.5761106
J. Leski, E. Tkacz
The paper presents a new approach to the QRS complex detection problem in noisy ECG signal. Complexes were distinguished into two classes: supraventricular and ventricular. For each class of QRS we introduced special filtering using matching filters facilities. The processing of the real time ECG incoming signal we performed in parallel for filters and decision concerning presence of particular complex was based on the output of these filters.
{"title":"A new parallel concept for QRS complex detector","authors":"J. Leski, E. Tkacz","doi":"10.1109/IEMBS.1992.5761106","DOIUrl":"https://doi.org/10.1109/IEMBS.1992.5761106","url":null,"abstract":"The paper presents a new approach to the QRS complex detection problem in noisy ECG signal. Complexes were distinguished into two classes: supraventricular and ventricular. For each class of QRS we introduced special filtering using matching filters facilities. The processing of the real time ECG incoming signal we performed in parallel for filters and decision concerning presence of particular complex was based on the output of these filters.","PeriodicalId":6457,"journal":{"name":"1992 14th Annual International Conference of the IEEE Engineering in Medicine and Biology Society","volume":"54 1","pages":"555-556"},"PeriodicalIF":0.0,"publicationDate":"1992-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74561427","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1992-10-01DOI: 10.1109/IEMBS.1992.5761997
M. Klibanov
We have developed numerical methods for several inverse scattering problems (ISP). These problems have significant applications in laser imaging of biological tissues and in identification of underwater systems. Due to lack of space we are unable to present available results of computational experiments. These experiments show high efficiency of the methods.
{"title":"Numerical methods for some inverse scattering problems","authors":"M. Klibanov","doi":"10.1109/IEMBS.1992.5761997","DOIUrl":"https://doi.org/10.1109/IEMBS.1992.5761997","url":null,"abstract":"We have developed numerical methods for several inverse scattering problems (ISP). These problems have significant applications in laser imaging of biological tissues and in identification of underwater systems. Due to lack of space we are unable to present available results of computational experiments. These experiments show high efficiency of the methods.","PeriodicalId":6457,"journal":{"name":"1992 14th Annual International Conference of the IEEE Engineering in Medicine and Biology Society","volume":"29 1","pages":"1700-1700"},"PeriodicalIF":0.0,"publicationDate":"1992-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74574606","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1992-10-01DOI: 10.1109/IEMBS.1992.5761109
J. G. C. Kemmelings, A. Linnenbank, S. Muilwijk, A. SippensGroenewegen, A. Peper, C. Grimbergen
A QRS detection algorithm has been developed for use in body surface mapping of ventricular tachycardia. To detect the QRS complexes the algorithm uses three computed signals: the sum of the absolute value of all leads, the sum of the absolute value of the differences of consecutive samples in all leads and, the second order derivative of the first mentioned.
{"title":"Automatic QRS detection during body surface mapping of ventricular tachycardia","authors":"J. G. C. Kemmelings, A. Linnenbank, S. Muilwijk, A. SippensGroenewegen, A. Peper, C. Grimbergen","doi":"10.1109/IEMBS.1992.5761109","DOIUrl":"https://doi.org/10.1109/IEMBS.1992.5761109","url":null,"abstract":"A QRS detection algorithm has been developed for use in body surface mapping of ventricular tachycardia. To detect the QRS complexes the algorithm uses three computed signals: the sum of the absolute value of all leads, the sum of the absolute value of the differences of consecutive samples in all leads and, the second order derivative of the first mentioned.","PeriodicalId":6457,"journal":{"name":"1992 14th Annual International Conference of the IEEE Engineering in Medicine and Biology Society","volume":"88 1","pages":"561-562"},"PeriodicalIF":0.0,"publicationDate":"1992-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74820044","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1992-10-01DOI: 10.1109/IEMBS.1992.5762075
S. Serbouti, R. Beuscart, H. Harms, A. Duhamel, U. Gunzer, P. Morel, H. Aus, J. Mary
Blast cells, also referred to as immature mononuclear cells, are key indicators in the diagnosis and treatment of leukemias. Pappenheim-stained blasts exhibit a single, more or less dark magenta, generally round nucleus surrounded by light blue cytoplasm. An observer readily identifies this class of cells using common morphological criteria such as size, shape, optical density, and N/C ratio. But there also exist visually apparent textural differences in both the nucleus and cytoplasm, including vacuoles, granulation, and inclusion bodies. Current quantitative descriptions are very diffuse and complex.
{"title":"Texture analysis of stained cells","authors":"S. Serbouti, R. Beuscart, H. Harms, A. Duhamel, U. Gunzer, P. Morel, H. Aus, J. Mary","doi":"10.1109/IEMBS.1992.5762075","DOIUrl":"https://doi.org/10.1109/IEMBS.1992.5762075","url":null,"abstract":"Blast cells, also referred to as immature mononuclear cells, are key indicators in the diagnosis and treatment of leukemias. Pappenheim-stained blasts exhibit a single, more or less dark magenta, generally round nucleus surrounded by light blue cytoplasm. An observer readily identifies this class of cells using common morphological criteria such as size, shape, optical density, and N/C ratio. But there also exist visually apparent textural differences in both the nucleus and cytoplasm, including vacuoles, granulation, and inclusion bodies. Current quantitative descriptions are very diffuse and complex.","PeriodicalId":6457,"journal":{"name":"1992 14th Annual International Conference of the IEEE Engineering in Medicine and Biology Society","volume":"69 1","pages":"1864-1865"},"PeriodicalIF":0.0,"publicationDate":"1992-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74827214","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1992-10-01DOI: 10.1109/IEMBS.1992.5761347
P. Cinquin, S. Lavallée, J. Troccaz
Existing imaging devices can be used to plan complex medical and surgical interventions. Recent advances in Robotics provide the opportunity of assisting the physician or the surgeon in performing the intervention. Assisting both planning and performing of interventions raise problems of information modelling, data registration, surgical planning and specific problems for using partially autonomous systems. A general methodology for computer assisted medical interventions is proposed, which turns out to be a particular case of the classical loop of Perception — Decision — Action. Clinical applications are presented.
{"title":"IGOR: Image guided operating robot. Methodology, applications","authors":"P. Cinquin, S. Lavallée, J. Troccaz","doi":"10.1109/IEMBS.1992.5761347","DOIUrl":"https://doi.org/10.1109/IEMBS.1992.5761347","url":null,"abstract":"Existing imaging devices can be used to plan complex medical and surgical interventions. Recent advances in Robotics provide the opportunity of assisting the physician or the surgeon in performing the intervention. Assisting both planning and performing of interventions raise problems of information modelling, data registration, surgical planning and specific problems for using partially autonomous systems. A general methodology for computer assisted medical interventions is proposed, which turns out to be a particular case of the classical loop of Perception — Decision — Action. Clinical applications are presented.","PeriodicalId":6457,"journal":{"name":"1992 14th Annual International Conference of the IEEE Engineering in Medicine and Biology Society","volume":"94 1","pages":"1048-1049"},"PeriodicalIF":0.0,"publicationDate":"1992-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75923669","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1992-10-01DOI: 10.1109/IEMBS.1992.5761105
M. Saki, Y. Z. Ider, B. Ozin, A. Oto
Root-mean-square values of the residual signals between a P wave template and individual P waves were computed and a tachogram was made. Using Autoregressive (AR) modelling, a major spectral peak was observed at 0.2 Hz for both this tachogram and the respiratory volume signal. A similiar spectrum was obtained from the RMS tachogram of the isoelectric signal segments prior to the P waves. When the lead signals were filtered (6–12.5 Hz), the energy in the RMS tachogram of the isoelectric region almost vanished. On the other hand, volume gated signal averaging of the P waves led to two distinct averages corresponding to high and low respiratory volume. The difference was in the form of up to 10% amplitude scaling.
{"title":"Respiration affects on P wave alignment and averaging","authors":"M. Saki, Y. Z. Ider, B. Ozin, A. Oto","doi":"10.1109/IEMBS.1992.5761105","DOIUrl":"https://doi.org/10.1109/IEMBS.1992.5761105","url":null,"abstract":"Root-mean-square values of the residual signals between a P wave template and individual P waves were computed and a tachogram was made. Using Autoregressive (AR) modelling, a major spectral peak was observed at 0.2 Hz for both this tachogram and the respiratory volume signal. A similiar spectrum was obtained from the RMS tachogram of the isoelectric signal segments prior to the P waves. When the lead signals were filtered (6–12.5 Hz), the energy in the RMS tachogram of the isoelectric region almost vanished. On the other hand, volume gated signal averaging of the P waves led to two distinct averages corresponding to high and low respiratory volume. The difference was in the form of up to 10% amplitude scaling.","PeriodicalId":6457,"journal":{"name":"1992 14th Annual International Conference of the IEEE Engineering in Medicine and Biology Society","volume":"75 1","pages":"553-554"},"PeriodicalIF":0.0,"publicationDate":"1992-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76112494","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1992-10-01DOI: 10.1109/IEMBS.1992.5761712
D. McGrouther
The action of electrical currents on living tissues has been a subject of fascination since the early descriptions of electrical currents. Electricity has been documented as a control system in organ function in the heart and nervous system. In tissues electrical potentials have been documented, particularly in healing wounds. A skin battery potential has been described and electrical currents have been demonstrated in the amputation stumps of lower vertebrates during limb regeneration. The possibility exists that electrical currents may have beneficial effects in stimulating the healing process. It is even possible that some of these effects are apparent at the margins of areas injured by electrical current. To achieve a better understanding of these beneficial effects, a number of experimental studies have been performed in our laboratories. A number of models of the wound healing process have been adopted. It has been shown that punched holes will heal in skin specimens maintained in a viable state in vitro in tissue culture medium. stimulation of these skin specimens by passage of a low current has been shown to speed the rate of reduction of the punched holes. Active self proliferation has been noted at the wound margins by BRDU uptake and the deposition of hyaluronic acid has been noted.
{"title":"Electrical injuries — Not all bad?","authors":"D. McGrouther","doi":"10.1109/IEMBS.1992.5761712","DOIUrl":"https://doi.org/10.1109/IEMBS.1992.5761712","url":null,"abstract":"The action of electrical currents on living tissues has been a subject of fascination since the early descriptions of electrical currents. Electricity has been documented as a control system in organ function in the heart and nervous system. In tissues electrical potentials have been documented, particularly in healing wounds. A skin battery potential has been described and electrical currents have been demonstrated in the amputation stumps of lower vertebrates during limb regeneration. The possibility exists that electrical currents may have beneficial effects in stimulating the healing process. It is even possible that some of these effects are apparent at the margins of areas injured by electrical current. To achieve a better understanding of these beneficial effects, a number of experimental studies have been performed in our laboratories. A number of models of the wound healing process have been adopted. It has been shown that punched holes will heal in skin specimens maintained in a viable state in vitro in tissue culture medium. stimulation of these skin specimens by passage of a low current has been shown to speed the rate of reduction of the punched holes. Active self proliferation has been noted at the wound margins by BRDU uptake and the deposition of hyaluronic acid has been noted.","PeriodicalId":6457,"journal":{"name":"1992 14th Annual International Conference of the IEEE Engineering in Medicine and Biology Society","volume":"57 1","pages":"2828-2829"},"PeriodicalIF":0.0,"publicationDate":"1992-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76134191","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1992-10-01DOI: 10.1109/IEMBS.1992.5761572
G. Sita, I. Murthy
A technique is proposed for classifying respiratory volume waveforms(RVW) into normal and abnormal categories of respiratory pathways. The proposed method transforms the temporal sequence into frequency domain by using an orthogonal transform, namely discrete cosine transform (DCT) and the transformed signal is pole-zero modelled. A Bayes classifier using model pole angles as the feature vector performed satisfactorily when a limited number of RVWs recorded under deep and rapid (DR) manoeuvre are classified.
{"title":"Modelling and classification of respiratory volume wavefourms","authors":"G. Sita, I. Murthy","doi":"10.1109/IEMBS.1992.5761572","DOIUrl":"https://doi.org/10.1109/IEMBS.1992.5761572","url":null,"abstract":"A technique is proposed for classifying respiratory volume waveforms(RVW) into normal and abnormal categories of respiratory pathways. The proposed method transforms the temporal sequence into frequency domain by using an orthogonal transform, namely discrete cosine transform (DCT) and the transformed signal is pole-zero modelled. A Bayes classifier using model pole angles as the feature vector performed satisfactorily when a limited number of RVWs recorded under deep and rapid (DR) manoeuvre are classified.","PeriodicalId":6457,"journal":{"name":"1992 14th Annual International Conference of the IEEE Engineering in Medicine and Biology Society","volume":"93 1","pages":"2529-2530"},"PeriodicalIF":0.0,"publicationDate":"1992-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75005113","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1992-10-01DOI: 10.1109/IEMBS.1992.5760904
G. Urban, G. Jobst, F. Keplinger, E. Aschauer, R. Fasching, A. Jachimowicz, F. Kohl
Miniaturized thin-film biosensors integrated on a flexible substrate were developed for in vivo applications and for use in clinical analyzers. A glucose, a lactate sensor and a pH-sensor was integrated. Both enzyme sensors are based on the measurements of H2 O2 produced by the enzymes glucoseoxidase and lactateoxidase respectively. The solid state pH-sensor uses a neutral carrier membrane. The Intended use of this device is the monitoring of metabolic parameters in the intensive care unit and the operation theatre and the application in clinical analyzers. The glucose-, lactate-and pH-sensor were tested in buffer solutions, serum and whole blood showing excellent performance.
{"title":"Integrated miniaturized biosensors for clinical analyzers and in vivo applications","authors":"G. Urban, G. Jobst, F. Keplinger, E. Aschauer, R. Fasching, A. Jachimowicz, F. Kohl","doi":"10.1109/IEMBS.1992.5760904","DOIUrl":"https://doi.org/10.1109/IEMBS.1992.5760904","url":null,"abstract":"Miniaturized thin-film biosensors integrated on a flexible substrate were developed for in vivo applications and for use in clinical analyzers. A glucose, a lactate sensor and a pH-sensor was integrated. Both enzyme sensors are based on the measurements of H2 O2 produced by the enzymes glucoseoxidase and lactateoxidase respectively. The solid state pH-sensor uses a neutral carrier membrane. The Intended use of this device is the monitoring of metabolic parameters in the intensive care unit and the operation theatre and the application in clinical analyzers. The glucose-, lactate-and pH-sensor were tested in buffer solutions, serum and whole blood showing excellent performance.","PeriodicalId":6457,"journal":{"name":"1992 14th Annual International Conference of the IEEE Engineering in Medicine and Biology Society","volume":"35 1","pages":"157-158"},"PeriodicalIF":0.0,"publicationDate":"1992-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75118693","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 1992-10-01DOI: 10.1109/IEMBS.1992.5762039
S. Russo, A. Mazzeo, N. Mazzocca
Off-line reconstruction of digital radiographic images obtained with a double side silicon micostrip detector requires a huge amount of computing resources. We suggest the use of a distributed-memory parallel architecture to increase the speed of a possible ‘in list’ system for Digital Radiography. We present a mathematical model of the expected performances of a pipeline parallel architecture. Results of experiments made with software synthetized images on a Transputer-based system with up to eight nodes show the effectiveness of our approach.
{"title":"A parallel architecture for Digital Radiography","authors":"S. Russo, A. Mazzeo, N. Mazzocca","doi":"10.1109/IEMBS.1992.5762039","DOIUrl":"https://doi.org/10.1109/IEMBS.1992.5762039","url":null,"abstract":"Off-line reconstruction of digital radiographic images obtained with a double side silicon micostrip detector requires a huge amount of computing resources. We suggest the use of a distributed-memory parallel architecture to increase the speed of a possible ‘in list’ system for Digital Radiography. We present a mathematical model of the expected performances of a pipeline parallel architecture. Results of experiments made with software synthetized images on a Transputer-based system with up to eight nodes show the effectiveness of our approach.","PeriodicalId":6457,"journal":{"name":"1992 14th Annual International Conference of the IEEE Engineering in Medicine and Biology Society","volume":"49 4 1","pages":"1784-1786"},"PeriodicalIF":0.0,"publicationDate":"1992-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77470637","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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