Biomedical Radioelectronics最新文献

{"title":"Implementation of a non-contact method for monitoring the patient's breathing and heartbeat during a magnetotherapy session","authors":"S. G. Gurzhin, V.L. Nguyen","doi":"10.18127/j15604136-202104-04","DOIUrl":"https://doi.org/10.18127/j15604136-202104-04","url":null,"abstract":"Nowadays, it is becoming especially important to use in clinical practice non-contact automated methods and hardware and software for the prompt obtaining of objective diagnostic information about the current physiological state of the patient during physiotherapy sessions. In particular, in magnetotherapy, there is a need for continuous monitoring of the patient's body responses to magnetic effects, so that the doctor can visually observe the dynamics of the normalization of the patient's vital signs, quickly assess the effectiveness of the treatment technique and, if possible, correct biotropic parameters. The problem is that today there are no non-contact diagnostic tools that can work together with magnetotherapy equipment under the control of a single computer and promptly present a large set of diagnostic indicators to the doctor in real time. An important feature and advantage of the proposed method is the use of publicly available standard and certified hardware tools for building a monitoring system: a personal computer, a web camera, a mouse, and a USB interface. The functions of a sensor or primary measuring transducer are performed by a webcam with high sensitivity and resolution. The original software is in the form of virtual instruments in the LabVIEW environment and the Vison Development application. As a result of this development, it became possible to flexibly control both the process of formation and reproduction of magnetic therapy effects and the process of automatic control of the patient's physiological state during a therapy session. Rapid assessment of diagnostic indicators also allows not only objectively, documenting and quantitatively confirming the level of effectiveness of each treatment session, but also serves the doctor with timely information to correct the method of exposure. Purpose – to show the possibility of implementing a non-contact method for monitoring the patient's breathing and heartbeat process, on-line assessment of diagnostic indicators using standard and publicly available hardware and software. A method has been developed and an algorithm has been implemented for non-contact monitoring of the patient's respiration and heartbeat on the basis of a personal computer, web camera, virtual instruments of the LabVIEW library and the Vison Development application. It is shown that the algorithm fully meets the requirements for computer vision algorithms: robustness, accuracy, and computational feasibility. The algorithm provides stability of video information conversion processes to significant distortions and changing factors, elimination of errors in object positioning or false detection, as well as a quick search for an object and a targeted organization of the image analysis process. Practical significance. The introduction of the developed hardware and software into the systems of complex magnetotherapy «Multimag» and «Relaxmag» will significantly increase the effectiveness of treatment due to the o","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":"130736281","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":"Selection of P300 signal features based on machine learning and the Morlet wavelet use for BCI applications","authors":"N. Haddad, M. Derkach, A. Dmitriev, I. Sergeev, S. Shchukin","doi":"10.18127/j15604136-202105-03","DOIUrl":"https://doi.org/10.18127/j15604136-202105-03","url":null,"abstract":"Brain-computer interface is a promising technology that gives humans with a motor disease in some particular cases the ability to directly control computers or any external devices using only brain signals such as EEG. Among a variety of EEG patterns that were used to design EEG-based BCI, P300 is considered as one of the most common options for fine motor rehabilitation. Efficient P300 detection is essential due to its crucial role in evaluating the accuracy and reliability of brain-computer interfaces, in the last few years, Machine learning methods have been widely used as classifiers for P300. Where the quality of the classification using these methods significantly depends on the input features. This work aims to study the parameters of visual stimulation, as well as the characteristics of the P300, which would lead to an increase in the accuracy of the target stimulus detection for the P300-BCI system. Correlation analysis between target – non-target stimuli and wavelet Morlet has been done after splitting the data according to the stimulation frequency for comparisons, taking into account the stimulation parameters that were used in each experiment to find out which stimulation parameters are more suitable for brain-computer interface based on P300. A comparative analysis of various features of the P300 using artificial neural networks has been considered to achieve more analytical and consistent conclusions. The use of ANN in our work has been decided after considering many other methods like support vector machine, linear discriminant analysis, and Random forest. A significant improvement in the classification accuracy was achieved using the correlation function as a P300 feature. It was found that the wavelet parameters should be selected individually for each participant. However, no direct relationship was found between the wavelet parameters and the stimulation frequency. Taking into account the individual parameters of the wavelet Morlet for each patient, and using the correlation function as a P300 feature, allows achieving a significant increase in the classification accuracy of the target stimulus. In addition to the importance of choosing the most appropriate paradigm during the experiment, which would increase the quality of data and thus improve BCI performance.","PeriodicalId":169108,"journal":{"name":"Biomedical Radioelectronics","volume":"2 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":"124040430","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":"Register of the human brain acoustic area spectrum","authors":"G. Shabanov, А.А. Rybchenko, Y. Lebedev, Е.А. Lugovaya","doi":"10.18127/j15604136-202103-03","DOIUrl":"https://doi.org/10.18127/j15604136-202103-03","url":null,"abstract":"Abstract. Last years, there were developed methods based on the human brain and body acoustic signals application. We consider human brain micro vibrations as an ancient, highly reliable, relatively rapid channel of the central nervous system with all the organism cells and structures. There is offered a method of the human brain acoustic area spectrum analysis and registration. Experimental sample “Register of the human brain micro vibrations spectrum is developed. The model of the human brain acoustic area generation is offered – neurovascular reflex and related with human brain blood vessels smooth muscularity nerve cells metabolism. In comparison with classical EEG, it is demonstrated that acoustic encephalogram also reflects human brain neuroreflex activity. Piezoelectric sensors, which feature in silicone membrane existence, are investigated. Such type of construction allowed to register human brain mechanical vibrations in the gamut from 0.1 up to 27 Hz. Spectral analysis is specific in that signal integration time is 160 seconds. Meanwhile, 12600 spectral harmonics of the human brain reticular activating system were reliably extracted. For convenience, all the acoustic area spectrum of the human brain was shrunk into segmental frame of reference which is frequency structured matrix of functional conditions multiplicity “multiple arousal” of 24х625 frequency cells size. All the developed technologies and device might be used for the organism adaptation estimations, psycho-emotional conditions estimations and functional-topical diagnosis of the internal parts of the human body.","PeriodicalId":169108,"journal":{"name":"Biomedical Radioelectronics","volume":"113 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":"122437658","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":"Complex discrete samples in electrocardiosignal processing tasks","authors":"Yu.A. Bulgakov, T. Vityazeva, A. Mikheev","doi":"10.18127/j15604136-202104-10","DOIUrl":"https://doi.org/10.18127/j15604136-202104-10","url":null,"abstract":"A typical task of preprocessing an electrocardiosignal is to eliminate the isoline drift. The presence of the isoline drift changes the position of the ST segment relative to the zero line, which leads to a distortion of the informative parameters of the ST segment. Modern electrocardiographs are equipped with high-pass filters for isoline drift removal. In this case, along with the isoline drift, a part of the spectral components of the useful signal is removed from the electrocardiogram signal. Preservation of the components of the spectrum of the electrocardiogram signal is possible by interpolating discrete samples of the isoline drift signal taken on the PQ segment or the TP interval. In this case, the sampling rate of the isoline drift signal is determined by the heart rate. Consequently, when the frequency of the isoline drift signal changing increases, the accuracy of its recovery deteriorates, and when half of the heart rate is reached, recovery becomes impossible. Purpose – the working purpose is to find ways to eliminate the isoline drift even in the presence of components in its spectrum with frequencies reaching the heart rate, while preserving the informative spectral components of the electrocardiosignal. This purpose can be achieved by converting the samples of the isoline drift signal taken at the TP interval of the electrocardiosignal into a group of samples forming a complex discrete sample (CDS). In the spectrum of the CDS sequence, the specified spectral zones can be suppressed. It is sufficient to suppress the first spectral zone at the sampling rate equal to the average heart rate to isolate the isoline drift. In this case, the frequency of the isolated isoline drift signal can theoretically be increased to the sampling rate, which is up to the heart rate. Due to the heart rate variability, the isoline drift signal samples taken at the TP interval will have a varying repetition period (sampling period). To take this fact into account, the following tasks have been solved. The analysis of the spectral composition of the sequences of samples, from which complex discrete samples are formed, has been carried out with a changing sampling rate. Pulse-frequency modulation is used as a mathematical model of the sample sequence. It has been found that with a changing sampling rate, the side components remain non-suppressed in the suppressed spectral zone at the frequencies that differ from the sampling rate by the frequency of sampling rate change. The conditions for the equality of all spectral components in the suppressed spectral zone to zero have been determined. Mathematical expressions that describe these conditions and allow us to determine the amplitude-time parameters of the CDS necessary for the implementation of these conditions have been obtained. Mathematical simulation of the CDS spectra, which confirmed the workability of the proposed description of the CDS with a changing sampling period, has been carried out. The ob","PeriodicalId":169108,"journal":{"name":"Biomedical Radioelectronics","volume":"62 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":"129272623","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":"Support for management medical decisions and the nature of uncertainty in them","authors":"S.Yu. Zhuleva, A. Kroshilin, S. Kroshilina","doi":"10.18127/j15604136-202104-12","DOIUrl":"https://doi.org/10.18127/j15604136-202104-12","url":null,"abstract":"The process of making a medical decision is characterized by a lack of knowledge and inconsistency of the available information, the lack of the possibility of attracting competent medical experts, limited time resources, incomplete or inaccurate information about the patient's condition. These aspects may be the causes of medical errors, which lead to further aggravation of the problem situation. Purpose – it is necessary to define and justify managerial medical decisions and types of medical information in conditions of uncertainty, when each variant of the sets of outcomes of the situation (recommendations) has its own unique set of values. The fundamental difference between this process for medical use is the concept of the \"best medical solution\", in which the key role is given to the patient's state of health in obtaining and evaluating alternatives, as well as the need to take into account the time, adverse reactions of the body and the costs of implementing this solution. In the medical field, support for medical decision-making can be classified as organizational-managerial and therapeutic-diagnostic, but both are determined by the position of the person making the medical decision and are aimed at effective management of the medical institution as a whole. The article describes the causes and factors of the nature of uncertainty in the tasks of supporting medical decision-making in medical-diagnostic and organizational-managerial areas. The analysis of the features of supporting medical decision-making in conditions of uncertainty is carried out. Approaches and directions in this area, as well as the concept of “solution”, are considered. The essence of the management medical decision is reflected. The classification of management medical decisions is given, the requirements that are imposed on them are highlighted. The features of the development of management medical solutions in the conditions of incompleteness and uncertainty, the problems that arise when they are implemented in information systems are presented. The general scheme of the process of creating a management medical solution is shown. The features of making group and individual decisions are reflected. The algorithm of actions of the person making the medical decision in the conditions of uncertainty, incompleteness and risk in medical subject areas is presented.","PeriodicalId":169108,"journal":{"name":"Biomedical Radioelectronics","volume":"6 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":"132446432","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":"Mode of use by mobile phone and change of time of simple audio-motor reaction for users of mobile communication. Age related features of ipsilateral and contralateral effects","authors":"N. Khorseva, O.R. Al’-Kudri, P. E. Grigoryev, R.I. Islyamov, N.Yu. Shulzhenko","doi":"10.18127/j15604136-202101-05","DOIUrl":"https://doi.org/10.18127/j15604136-202101-05","url":null,"abstract":"By analysing the time of a simple auditory-motor reaction with mono-presentation of an audio signal, the effect of the electromagnetic radiation of a mobile phone on the human auditory system is evaluated. Regularities in the frequency of occurrence of ipsi and contralateral effects in mobile users of different age groups are obtained. This study has no analogues in either Russian or foreign publications and is currently exclusive. The purpose was to study age-related features of the severity of ipsi and contralateral effects, depending on the mode of use of the mobile phone. To record the ipsi- and contralateral effects, we used the differences in the average values of a simple auditory-motor reaction between the left and right ears with mono-presentation of the sound signal of 573 respondents of different age groups. The obtained values were compared with the control group data for each age group (491 respondents). If the difference was greater than in the control group, the ipsilateral or contralateral effect was recorded. The severity of the effect was evaluated taking into account the lateral preferences of each participant in the experiments (to which ear the mobile phone is most often held) and the mode of use of the mobile phone. Statistical processing of the results was carried out using the non-parametric Mann-Whitney test and the method of descriptive statistics: prevalence indicator (Pr) (relative frequency of manifestation of a particular attribute in the sample). The comparison of the severity of ipsi and contralateral effects for different age groups allowed us to establish the following patterns. It was found that, in general, the manifestation of the contralateral effect decreases with age, and the ipsilateral effect increases. However, this change is not linear. It is shown that the features of the manifestation of the contralateral and ipsilateral effect for each age group depend both on the time of daily use of a mobile phone and on the total duration of use of a mobile phone. We believe that when studying multidimensional input data, an individual approach is necessary. The presented results confirm the negative effect of the radiation of mobile phones on the auditory system, primarily of our younger generation. Given the special vulnerability of children to physical environmental factors and the depth of penetration of EMR MT into the brain of a child, we believe that from a radiobiological point of view, there is already a need to develop a special SanPiN (sanitary rules and norms) for all available modern low-intensity sources of electromagnetic radiation, including Wi-Fi.","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":"121470005","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":"Investigation of the impact of a balanced diet according to the method of alfitherapy on the human body","authors":"I. Pronin","doi":"10.18127/j15604136-202103-07","DOIUrl":"https://doi.org/10.18127/j15604136-202103-07","url":null,"abstract":"In the late 1980s – early 1990s, General A.V. Shcherbakov and Professor I.V. Pronin, who participated in the creation of the Russian Rescue Corps, developed a new method for saving all living things during disasters, dangerous climatic conditions, deadly situations, using the latest developments of Professor I.V. Pronin, which have no analogues in the world and named it \"Medicine of support in extreme situations\". For civilians, this system, based on the intersection of microbiology, algology and herbal medicine, became known as Alphitherapy. Initially, the method was intended for special forces operating in rescue operations during man-made disasters, as well as disasters caused by natural disasters. Alphitherapy is a method of balanced nutrition of plant origin with biologically active substances of medicinal plants, algae, microorganisms due to a combination of essential oils and active substances in high concentrations. The composition of a balanced diet according to the method of alfitherapy includes a living bactericidal environment, which many times exceeds the therapeutic capabilities of drugs of chemical origin. Purpose of work – investigation of the effect of accelerating regenerative processes and a healing effect as a result of the use of a balanced diet according to the method of alfitherapy. It has been established that a course of balanced nutrition according to the method of alfitherapy has antibacterial, antiviral and antimetastatic effects, making it possible in some cases to dispense with operations or surgical intervention. In the process of completing a course of balanced nutrition in a period from several days to three months, many types of damaged tissues and organs are regenerated, blood vessels are restored and the blood supply to the brain is enhanced, the liver and other organs are cleared of toxins, isotopes (radiation) and heavy metals at the intracellular and intercellular levels. It is possible to restore the cognitive, speech and motor functions lost as a result of strokes due to the complete regeneration of the damaged vessels of the brain.","PeriodicalId":169108,"journal":{"name":"Biomedical Radioelectronics","volume":"28 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":"133208790","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}