Biomedical Radioelectronics最新文献_第8页

System quantization of human behavior and a method for formalizing the parameters of a system quantum 人类行为的系统量化和形式化系统量子参数的方法

Biomedical Radioelectronics Pub Date : 1900-01-01 DOI: 10.18127/j15604136-202206-03

S. Klassina

引用次数: 1

Theta rhythm, attention and transcranial stimulation method Theta节律、注意和经颅刺激法

Biomedical Radioelectronics Pub Date : 1900-01-01 DOI: 10.18127/j15604136-202102-01

N. Karatygin, I. Korobeinikova

{"title":"Theta rhythm, attention and transcranial stimulation method","authors":"N. Karatygin, I. Korobeinikova","doi":"10.18127/j15604136-202102-01","DOIUrl":"https://doi.org/10.18127/j15604136-202102-01","url":null,"abstract":"Noninvasive methods of transcranial stimulation in clinical and research activity have become widely applied for the last few years. Due to the high spatial and temporal resolution, these methods allow to explore oscillatory processes that underlie important cognitive functions on a new level. In particular, researchers got an opportunity to influence rhythmic processes, which provide function of attention by these methods. By the way, stimulation of different brain zones with theta-rhythm frequency appears to be interesting, as far as oscillations of attention on this frequency reveal itself both in external activity of subject and in oscillatory activity of neurons and neural ensembles. Aim – analysis and summarize of domestic and foreign researches with usage of transcranial stimulation method to identify role of theta-rhythm in attention processes. Analysis of modern data concerning significance of theta-rhythm in organization of attention processes was performed analyzed. Different modes of transcranial stimulation methods, that allow to discover fundamental role of theta-rhythm in oscillatory activity of neural assembles, which are the base for attention mechanisms were considered. The review noted that the method of transcranial magnetic stimulation (TMS), which is based on the principle of electromagnetic induction with potential excellent temporal and sufficiently decent spatial resolution, is extensively widely used. Usually, TMS is performed with usage single-pulse, paired-pulse, or repetitive rhythmic stimulation. In current review special attention is salaried to the theta burst stimulation protocol. It was suggested that current protocol hypothesizes to influence brain plasticity and simulates the effect of theta-gamma coupling, which is to change the amplitude of the potentials at the frequency of the gamma rhythm depending on the theta wave phase. During the applying of the TMS different variants, several research methodological approaches were applied. Thus, usage of TMS may disrupt functioning in certain cortex areas , also it is possible to increase the oscillatory activity of a particular region at a particular frequency and to enhance or decrease the synchronization of remote cortical areas in a certain frequency range. These approaches may be used directly during the execution of the test task by the subjects or in the period prior the test performing. Many researches show that transcranial stimulation of some zones of cortex contributes to the achievement of better results of examinee in tests on memory and attention. This effect is most often observed while usage of stimulation with theta-rhythm frequency. Improvement of memory and attention functions has high practical meaning for wide range of activity. Understanding of regularities and mechanisms of stimulation with theta-rhythm frequency would allow to create systems and protocols of stimulation, which would effectively improve these functions for the long period.","PeriodicalId":169108,"journal":{"name":"Biomedical Radioelectronics","volume":"43 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":"133863741","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}

引用次数: 0

Multichannel medical 3D radiothermograph 多通道医用三维放射热像仪

Biomedical Radioelectronics Pub Date : 1900-01-01 DOI: 10.18127/j15604136-202206-07

V. Leushin, I. Sidorov, I. Porokhov, S. Chizhikov, S. Agasieva, R. V. Agandeev

引用次数: 0

Physical rehabilitation remote support methods for mobile systems 移动系统的物理康复远程支持方法

Biomedical Radioelectronics Pub Date : 1900-01-01 DOI: 10.18127/j15604136-202204-09

M. S. Ashapkina

引用次数: 0

Influence of digital filtering parameters on the pulse waveform in reflectance photoplethysmography 数字滤波参数对反射光体积脉搏波脉冲波形的影响

Biomedical Radioelectronics Pub Date : 1900-01-01 DOI: 10.18127/j15604136-202103-04

D. Lapitan, A. A. Glazkov, D. Rogatkin

{"title":"Influence of digital filtering parameters on the pulse waveform in reflectance photoplethysmography","authors":"D. Lapitan, A. A. Glazkov, D. Rogatkin","doi":"10.18127/j15604136-202103-04","DOIUrl":"https://doi.org/10.18127/j15604136-202103-04","url":null,"abstract":"Photoplethysmography (PPG) is an optical method for recording pulse wave (PW) propagating in the tissue microvasculature. As a rule, filters with infinite impulse response (Butterworth, Bessel, etc.) often used in PPG signal processing introduce distortions in the PW signal. At the same time, the filtering parameters for a more accurate reproduction of PW have not yet been substantiated. The aim of this work is to study the influence of digital filtering parameters, such as bandwidth and filter order, on the pulse waveform. In the study, a digital bandpass Butterworth filter was used. The lower cutoff frequency of the filter varied from 0.1 to 1 Hz, the upper cutoff frequency varied from 2 to 10 Hz and the filter order – from 2nd to 6th. It was found that an increase in the lower cutoff frequency of the bandpass filtering leads to a decrease in the amplitude of the reflected diastolic wave and distortion of the front of the direct systolic wave. A decrease in the upper cutoff frequency leads to damping of the dicrotic notch and a phase shift of the PW. Increasing the filter order decreases the reflected wave amplitude. The minimal distortions of the PPG signal were observed at the lower cutoff frequency of 0.1 Hz, the upper one at 10 Hz and the filter order equal to 2. Thus, these parameters of a bandpass filtering can be recommended for processing PPG signals for a more accurate morphological analysis of PW. The obtained results make it possible to create devices for PW analysis with substantiated medical and technical requirements for filtration parameters.","PeriodicalId":169108,"journal":{"name":"Biomedical Radioelectronics","volume":"307 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":"121683925","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}

引用次数: 0

Pharmacokinetics and dosimetry of Russian osteotropic radiopharmaceuticals: modeling and comparative analysis 俄罗斯促骨性放射性药物的药代动力学和剂量学:建模和比较分析

Biomedical Radioelectronics Pub Date : 1900-01-01 DOI: 10.18127/j15604136-202201-05

A. V. Matveev

引用次数: 0

Hardware and software complex for insulin therapy 胰岛素治疗的硬件和软件复合体

Biomedical Radioelectronics Pub Date : 1900-01-01 DOI: 10.18127/j15604136-202106-07

Yu. M. Rybin, I. Ageev, V. Novikov

引用次数: 0

Formation of initial projection data in reflection tomography in the implementation of technical vision 反射层析成像中初始投影数据的形成在技术视觉上的实现

Biomedical Radioelectronics Pub Date : 1900-01-01 DOI: 10.18127/j15604136-202104-08

A.A. Zhilnikov, T.A. Zhilnikov, V. Zhulev

{"title":"Formation of initial projection data in reflection tomography in the implementation of technical vision","authors":"A.A. Zhilnikov, T.A. Zhilnikov, V. Zhulev","doi":"10.18127/j15604136-202104-08","DOIUrl":"https://doi.org/10.18127/j15604136-202104-08","url":null,"abstract":"The known principles of active monostatic radar are based on the effect of radio wave scattering on objects located on the path of the probing signal, and the subsequent registration of a part of the wave reflected in the direction of the emitter. However, within the framework of this study, it is of interest to register objects that do not return a reflected radio echo towards the emitter. When fixing the position of an object, it is assumed that there is a possible absence of an echo signal characteristic of classical active radar with a passive response. The absence of a characteristic echo signal does not exclude its return as a result of repeated reflection inside the scene, including along other routes and from other objects. Purpose – within the framework of the implementation of technical vision in the course of tomographic observation of a complex radar scene that solves the problems of multidimensional reconstruction, a stochastic model based on the principles of tomography describing the subject area of a complex radar scene is developed. In the indicated relevance of the development of methods for radar detection of hidden objects inaccessible for registration by classical methods, a variant of using tomographic observation of a complex radar scene is proposed. In connection with the admitted lowangle and the emerging problems of an unambiguous deterministic definition, a description of the subject area of the scene from a stochastic position is proposed. In the proposed tomographic method, in conditions of limited initial data, when a deterministic approach to the reconstruction of the radar scene is not possible, an acceptable solution is sought in the stochastic description. At a given value by sampling the space, determined by the hexagonal lattice cell, the scene reconstruction is carried out by selecting and analyzing the echo signal trajectories from the possible set of proposed ones. The decision on the choice of one or another proposed trajectory and its transfer to the category of a possible solution is carried out on the basis of a preliminary calculation of the characteristics of the stochastic description.","PeriodicalId":169108,"journal":{"name":"Biomedical Radioelectronics","volume":"56 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":"116848562","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}

引用次数: 0

Difference of thermal patterns of the face and neck regions in states of physical and mental stresses 生理和心理应激状态下面部和颈部热模式的差异

Biomedical Radioelectronics Pub Date : 1900-01-01 DOI: 10.18127/j15604136-202101-02

S. Zhumazhanova

{"title":"Difference of thermal patterns of the face and neck regions in states of physical and mental stresses","authors":"S. Zhumazhanova","doi":"10.18127/j15604136-202101-02","DOIUrl":"https://doi.org/10.18127/j15604136-202101-02","url":null,"abstract":"Systems for remote detection of a person's state today have enormous potential, but the identification features of states in each system are different. States of mental and physical stress have a huge impact on the performance of the operator's work tasks, and it is important to distinguish between them. The purpose of the work is to review research on identifying states of physical and mental stress by analyzing the temperature of the subject's face and body; conducting experiments aimed at inducing a state of mental stress using the Stroop verbal-color test and physical stress after exercise and analyzing the main differences between the states and the perspectives for their use. Significant differences were found between the mean temperatures of the areas under physical stress and the standard deviation of temperatures under mental stress. The research results can be applied in applications, monitoring systems for the state of operators of complex technical and technological facilities. Stress is as a high level of emotional arousal, usually associated with mental or physical stress. To determine the stressful state of a person, a continuous analysis of physiological signals – ECG, EEG, skin temperature, respiratory rate is carried out. To overcome the limitations associated with the use of contact sensors for recording physiological parameters, methods of computational psychophysiology based on IR-imaging have been used recently. A review of the work on the formation of a thermal picture during and after physical and mental stress is provided. Experiments were carried out to register changes in the thermal patterns of the face and neck regions of 84 subjects after physical exercises and in a state of mental stress when passing the Stroop verbal-color test. A technique for automatic detection of 26 anatomical areas of face and neck regions was developed. The average value and standard deviation of temperatures of all selected areas of the face and neck regions in a state of physical stress are lower than in other states. The lowest temperature in a state of physical stress is observed in the area of the face under the nose and above the lip, which can be explained by the increased respiratory rate that occurs during and after exercise. In general, the low temperature readings compared to other conditions under consideration can be explained by increased sweating, lowering body temperature and narrowing of the lumen of blood vessels observed during exercise. Under mental stress, the average temperature values remain the same as in normal state, however, the standard deviation exceeds the same values during stress when passing the Stroop color test. Such leaps are especially noticeable in areas No. 5 and 6 – the inner corners of the eyes, as well as No. 21 and 22 – the area of the face under the nose, which is explained by the concentration of attention during the test and the frequent change in RR (increase/decrease in RR). Accounting for such ","PeriodicalId":169108,"journal":{"name":"Biomedical Radioelectronics","volume":"89 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":"126224968","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}

引用次数: 0

Development of an electrode system for navigation in biological tissues in real time 生物组织实时导航电极系统的研制

Biomedical Radioelectronics Pub Date : 1900-01-01 DOI: 10.18127/j15604136-202205-03

A.A. Satanenko, I. Kudashov, A. Nikolaev, S. Shchukin

引用次数: 0