Biomedical Radioelectronics最新文献

{"title":"Cardiorespiratory monitoring of the patient in complex chronomagnetic therapy","authors":"S. G. Gurzhin, V. Zhulev, M. Lapkin, E. M. Proshin, A. V. Shulyakov","doi":"10.18127/j15604136-202204-01","DOIUrl":"https://doi.org/10.18127/j15604136-202204-01","url":null,"abstract":"","PeriodicalId":169108,"journal":{"name":"Biomedical Radioelectronics","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120950050","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}

{"title":"Comparison of radiofrequency ablation processes for monopolar and bipolar systems","authors":"V. Makarov, N. Boos","doi":"10.18127/j15604136-202103-06","DOIUrl":"https://doi.org/10.18127/j15604136-202103-06","url":null,"abstract":"Most of the manufactured radiofrequency ablation devices use single electrodes inserted into the tumor for heating. In order to increase the volume of heating, they are cooled from the inside, and some have a system for wetting the outer surface of the electrode with saline. The need for necrosis of tumors with a diameter of more than 3 cm made us look for other design solutions that would significantly increase the volume of heated tissue. At the beginning, these were attempts to increase the number of heat sources inside the tumor by opening additional wires in the tumor, then the transition began to increase the number of electrodes to three and increase the number of working zones on each electrode. As a result, heating volumes of 90 cm3 were achieved with a heating time of 45 min. A study of the scientific and technical literature on RFA showed that foreign firms producing ablation devices already understand the need to replace monopolar electrodes with bipolar multi-electrode devices. The reason for this is not only the better postoperative characteristics of the use of bipolar electrodes, but also the emergence, in addition to oncology, of new areas of ablation application, where more complex forms of thermal fields are used during therapy, for example, tubular zones of necrosis. A radical solution to the problem of increasing the volume of coagulation is the transition from monopolar single electrodes to bipolar multielectrode designs. In this case, the electric field is concentrated in the areas between the electrodes and the heating efficiency increases significantly throughout the tumor volume, including the peripheral part. The most effective way is to incorporate bipolar electrodes into a circular cluster, allowing all electrodes to work simultaneously. Under the control of an ultrasound scanner, 4 to 12 electrodes are inserted, operating in bipolar mode. A model has been developed and the design of a four-electrode cluster has been developed, which allows for distributed heating of the tumor in a bipolar mode. As a result of the studies carried out, it was found that the use of bipolar systems allows: to significantly increase the volume of the area of necrosis due to the possibility of increasing the power supplied to the tumor; to reduce the unevenness of heating over the volume of the tumor by obtaining temperature fields, the shape of which is closest to the required one; improve patient survival rates by placing electrodes outside the tumor (“NO TOUCH” mode). The work performed indicates the technical possibility of a significant increase in the volume of destroyed tissue by increasing the number of electrodes and placing electrodes along the tumor volume closer to the periphery, including the ablastic zone. As a result, it became possible to heat tumors from their periphery without contacting the electrodes with the tumor. The increase in the number of heat sources made it possible not only to reduce the load on the electrodes","PeriodicalId":169108,"journal":{"name":"Biomedical Radioelectronics","volume":"194 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126049572","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}

{"title":"Memory (recollection) manifestation in electroencephalogram based on wavelet transforms","authors":"E. A. Yumatov, N. Karatygin, E. Dudnik, O. Glazachev, A.I. Filipchenko, L. T. Sushkova, R. V. Isakov, V.A. Al- Haidri, S. Pertsov","doi":"10.18127/j15604136-202106-04","DOIUrl":"https://doi.org/10.18127/j15604136-202106-04","url":null,"abstract":"","PeriodicalId":169108,"journal":{"name":"Biomedical Radioelectronics","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126843949","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}

{"title":"Automated complex for remote medical examination","authors":"M. Kaplan, O. Melnik, M. Nikiforov, D. I. Ustyukov, A. V. Shulyakov","doi":"10.18127/j15604136-202104-07","DOIUrl":"https://doi.org/10.18127/j15604136-202104-07","url":null,"abstract":"Elements of telemedicine are increasingly being introduced into all spheres of medical services for the population. One promising example is automated systems for remote pre-trip medical examination of drivers. However, most of the telemedicine systems used only control the basic parameters of the body provided for by law. An urgent task is to create methods and tools for a comprehensive assessment of the driver's health based on processing of a set of biomedical signals and data that allow tracking the dynamics of the functional and psychoemotional status. Purpose – development of an automated system for remote medical examination of drivers, which allows not only to monitor basic health indicators for admission to a flight, but also to track indirect signs of fatigue, stress and exposure to psychoactive substances that can provoke inappropriate behavior on the road. A microprocessor-based system for collecting and preliminary processing of information received from a set of biomedical sensors has been developed. The original modules for measuring blood pressure and pulse, non-contact temperature measurement and tremor parameters evaluating have been implemented. The set of diagnostic procedures for the pre-trip examination is implemented in a unified cycle, which ensures the complexity of the interpretation of the results. The developed automated complex and the hardware and software tools included in it can be used to conduct pre-trip examinations of drivers of public and special transport, providing an increase in the diagnostic efficiency of identifying signs that are risk factors when the driver is allowed to work.","PeriodicalId":169108,"journal":{"name":"Biomedical Radioelectronics","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132878213","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}

{"title":"Implementation of optimal multi-rate cardiac signal processing on a 1967BH028 DSP from “Milandr” design center in order to analyze heart rate variability","authors":"T. Vityazeva","doi":"10.18127/j15604136-202104-11","DOIUrl":"https://doi.org/10.18127/j15604136-202104-11","url":null,"abstract":"The analysis of heart rate variability in recent years has become very widespread as a tool for versatile diagnostics of the functional state of the human body. The analysis of heart rate variability is associated with processing procedures characterized by high requirements for the speed of the computational element base. These procedures, however, must be performed in real time in an embedded computing system. The article deals with the problem of reducing the number of computational operations and an implementation of heart rate variability on modern processor elements offered by the domestic industry. The aim of the work is to model the optimal structure of multi-rate signal processing in the analysis of heart rate variability and to implement this structure on a digital signal processor with an estimate of processing time and `memory costs. By modeling, it is shown that the developed optimal structure of multi-rate processing allows getting a reliable processing result while reducing computational costs by several hundred thousand times compared to the implementation at the original sampling frequency. The optimal structure is constructed as a two-stage filtering-decimation structure, followed by passing the signal at a reduced sampling rate through a set of analysis filters. The end-to-end decimation factor is 500. The simulation results allow us to proceed to the implementation on the signal processor. The program codes of the main processing stages, including filtration and filtration decimation, have been developed. It is shown that the processing time with high-quality optimization of program codes can reach 10 million clock cycles, which corresponds to 23 ms and fully satisfies the real-time processing requirement, leaving a large margin for implementing additional more complex analysis algorithms on the same processor. The practical significance of the results is that in addition to the proposed method of reducing computational and memory costs, a prototype of a possible device based on one of the most popular domestic signal processors is obtained.","PeriodicalId":169108,"journal":{"name":"Biomedical Radioelectronics","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133531391","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}

{"title":"Results of the hidden correlation study narrowband noise signals for information and measurement systems and diagnostic tools for medical purposes","authors":"E. I. Chernov, N. E. Sobolev, A. N. Vlasov","doi":"10.18127/j15604136-202204-03","DOIUrl":"https://doi.org/10.18127/j15604136-202204-03","url":null,"abstract":"","PeriodicalId":169108,"journal":{"name":"Biomedical Radioelectronics","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133813689","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}

{"title":"Hypoventilation breathing as a means of increasing the adaptability of the human body to intense physical work to failure","authors":"S. Klassina","doi":"10.18127/j15604136-202202-02","DOIUrl":"https://doi.org/10.18127/j15604136-202202-02","url":null,"abstract":"","PeriodicalId":169108,"journal":{"name":"Biomedical Radioelectronics","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133792915","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}

{"title":"EHF-therapy for correction of rheological properties of blood in chronic prostatitis (experimental in vitro study)","authors":"S. Kopylova, O.A. Sukharevskaya, A. A. Kazakov, A. B. Stroganov, S.V. Semennikova","doi":"10.18127/j15604136-202202-07","DOIUrl":"https://doi.org/10.18127/j15604136-202202-07","url":null,"abstract":"","PeriodicalId":169108,"journal":{"name":"Biomedical Radioelectronics","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124021445","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}

{"title":"Portable device equipped with the vibrotactile feedback to support the home physical rehabilitation","authors":"A. Alpatov, M. S. Ashapkina","doi":"10.18127/j15604136-202104-14","DOIUrl":"https://doi.org/10.18127/j15604136-202104-14","url":null,"abstract":"","PeriodicalId":169108,"journal":{"name":"Biomedical Radioelectronics","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125771531","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}

{"title":"Human respiratory monitoring during sleep using a two-channel bioradar","authors":"L. Anishchenko, V.S. Lobanova, I. Davydova, E. Ivanisova, L. Korostovtseva, M. Bochkarev, Y. Sviryaev, A. Bugaev","doi":"10.18127/j15604136-202105-06","DOIUrl":"https://doi.org/10.18127/j15604136-202105-06","url":null,"abstract":"permanent sleep deprivation and a decrease in sleep quality. Currently, in clinical practice, the method of polysomnography is used to detect sleep disorders. This method is expensive, labor and time-consuming, as well as uncomfortable for the patient. Therefore, at present, the problem of creating accurate, reliable and comfortable for the patients methods for assessing the sleep quality, as well as identifying and monitoring various sleep disorders, remains an up-to-date task of modern biomedical engineering. One of these methods is bioradiolocation, which allows detecting sleep disorders based on the variability of the breathing pattern of a sleeping person. However, because the amplitude of chest movements during breathing in different directions differs by an order of magnitude, the quality of the signal received by the bioradar during sleep also varies depending on the orientation of the sleeping person relative to the bioradar. To overcome this problem, in this article we propose a combined use of two bioradars oriented at different angles towards to the sleeping person. Thus, the aim of this work was to develop a bioradar system that provides reliable registration of the breathing pattern for various positions of a sleeping person. During the experiments, we used two monochromatic bioradars \"BioRASCAN-24\" with probing frequencies in the range of 24.0 and 24.1 GHz, located at an angle of 90 ° to each other. In this work, we used bioradar data recorded for seven volunteers who underwent polysomnographic research at the sleep laboratory of Almazov National Medical Research Centre. During the night, a parallel recording of bioradar signals and polysomnographic data was carried out for each subject using the Embla N7000 system (Natus Neurology Inc., USA). The duration of the experimental recording for each subject was from 7 to 9 hours. An algorithm was developed to extract a breathing pattern from a bioradar signal and estimate the respiratory rate of a sleeping person. It consisted of the following stages: synchronization of the bioradar and polysomnographic signals, demodulation, exclusion from consideration of signal fragments containing motion artifacts, signal filtering in order to isolate the breathing pattern, assessment of respiration rate in the inter-artifact periods for each of the bioradars separately, the final estimation of the respiration rate for the inter-artifact periods, taking into account the combination of data for both radars. Bioradar signal processing algorithms were done utilizing Matlab 2020b. To assess the accuracy of the proposed algorithm, we compared the respiratory rates calculated for each 30-second epoch using bioradar data with similar parameters calculated by the abdominal belt polysomnography sensor. The efficiency of the proposed algorithm was estimated by the accuracy and the mean absolute error. The results obtained for seven volunteers showed that the developed two-channel bioradar system turned out to","PeriodicalId":169108,"journal":{"name":"Biomedical Radioelectronics","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127452143","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}