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2020 Medical Technologies Congress (TIPTEKNO)最新文献

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Diagnosis of COVID-19 with a Deep Learning Approach on Chest CT Slices 基于胸部CT片深度学习的COVID-19诊断
Pub Date : 2020-11-19 DOI: 10.1109/TIPTEKNO50054.2020.9299266
Fatma Muberra Yener, A. B. Oktay
Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) first broke out in Wuhan, China and COVID-19 disease spread throughout the world by its highly contagious nature. High death numbers have caused a massive panic across the globe. Fast and early diagnosis is the key for preventing the virus from spreading. Besides PCR test, computed tomography (CT) of lungs is also used for diagnosis of COVID-19. Since the amount of testing kits for the diagnosis is insufficient and the conventional diagnosis methods are slow, developing AI-based fast diagnosis tools is not only an alternative way but also an urgent requirement for such alarming situations as those people faced with today. In this study, we employed three popular CNN models, VGG16, VGG19, and Xception, to classify CT scans of suspected patient cases as COVID-19 infected and non-COVID-19. VGG16 achieved 93% accuracy with the best parameters on the test set.
严重急性呼吸综合征冠状病毒2型(SARS-CoV-2)首先在中国武汉爆发,COVID-19疾病以其高度传染性传播到世界各地。高死亡率在全球范围内引起了巨大的恐慌。快速和早期诊断是防止病毒传播的关键。除了PCR检测外,肺部计算机断层扫描(CT)也被用于诊断COVID-19。由于用于诊断的检测试剂盒数量不足,传统诊断方法缓慢,开发基于人工智能的快速诊断工具既是一种替代方式,也是当今人们面临的这种令人担忧的情况的迫切要求。在本研究中,我们采用了三种流行的CNN模型VGG16、VGG19和Xception,将疑似病例的CT扫描分为COVID-19感染和非COVID-19。VGG16在测试集中以最佳参数达到93%的准确率。
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引用次数: 6
Spectroscopic and Computational Molecular Docking studies on the protein-drug interactions 蛋白质-药物相互作用的光谱和计算分子对接研究
Pub Date : 2020-11-19 DOI: 10.1109/TIPTEKNO50054.2020.9299322
Iraz Çinar, İrem Aksoy, Günnur Güler
Investigation of the protein-drug active substance interactions has great importance in the fields of medicine, chemistry, pharmaceutical, biomedical and toxicology. In this study, binding properties of a potential anti-cancer drug agent ifosfamide with bovine serum albumin (BSA), one of the main ligand transporters in blood plasma, was analyzed by using ultraviolet and visible light (UV-Vis) spectroscopy along with molecular docking studies. The UV-Vis spectra of the constant BSA solution (20x $10^{-6}$ M) in complexes with various concentrations of ifosfamide (20x $10^{-6}$ M to 140x $10^{-6}$ M) were obtained at physiological pH. Besides, the BSA protein was docked with ifosfamide drug active substance via computational molecular docking method. Amino acids in the binding sites of the BSA protein and the binding distances of these amino acids to the ligand (ifosfamide), their scores and RMSD values were determined, revealing that the interaction is a spontaneous process. Both molecular docking and the spectral results demonstrated that the anti-cancer drug agent binds to BSA via non-covalent interactions, resulting in minute conformational changes in BSA.
蛋白质与药物活性物质相互作用的研究在医学、化学、制药、生物医学和毒理学等领域具有重要意义。本研究利用紫外、可见光谱及分子对接研究分析了潜在抗癌药物异环磷酰胺与血浆中主要配体转运体之一牛血清白蛋白(BSA)的结合特性。在生理ph值下,获得恒定BSA溶液(20 × 10^{-6}$ M)与不同浓度异磷酰胺(20 × 10^{-6}$ M ~ 140 × 10^{-6}$ M)配合物的紫外可见光谱,并通过计算分子对接方法将BSA蛋白与异磷酰胺药物活性物质进行对接。测定了BSA蛋白结合位点的氨基酸和这些氨基酸与配体(异环磷酰胺)的结合距离、它们的得分和RMSD值,表明这种相互作用是一个自发的过程。分子对接和光谱结果表明,抗癌药物通过非共价相互作用与BSA结合,导致BSA的微小构象变化。
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引用次数: 0
Photobiomodulation with 655-nm Laser Light to Induce the Differentiation of PC12 Cells 655 nm激光光生物调节诱导PC12细胞分化
Pub Date : 2020-11-19 DOI: 10.1109/TIPTEKNO50054.2020.9299218
Emel Bakay, N. Topaloglu
The healing effect of light at low power and energy density can be used as a treatment or alternative supportive method in various diseases. The photobiostimulation effect created on neural cells is also a very promising approach in the treatment of important neurodegenerative diseases such as Alzheimer’s disease. In this study, the response of PC12 cells to photobiomodulation was investigated as a result of the low level laser therapy with 655 nm diode laser after triple treatment. The red light at an energy density of 1, 3 and 5 J/cm2 was applied to PC12 cells three times with 24h intervals. The differentiation capacity of the cells and the elongation rates of neurites were assessed. The neurite lengths were calculated by analyzing the microscopic images of the cells. Neurite-forming capacity and differentiation rate of PC12 cells was at the maximum level after the application with 1 J/cm2 energy, nearly 2 times of the control group. 5 J/cm2 of energy density strongly inhibited the cell proliferation and the elongation of the neurites. The cell viability percentages of the cells showed that 5 J/cm2 energy density inhibited cell viability with a rate of nearly 30%. The outcomes of this study emphasized that the adjustment of light parameters in photobiomodulation applications may result in biostimulation or bioinhibition depending on the intensity and the irradiance levels applied on the cells.
光在低功率和能量密度下的愈合效果可以作为各种疾病的治疗或替代支持方法。对神经细胞产生的光生物刺激效应在治疗重要的神经退行性疾病如阿尔茨海默病方面也是一种非常有前途的方法。本研究采用655 nm二极管激光对PC12细胞进行低强度激光治疗,经三联治疗后,研究了PC12细胞对光生物调节的响应。将能量密度分别为1、3、5 J/cm2的红光照射PC12细胞3次,间隔24h。观察细胞的分化能力和神经突的伸长率。通过分析细胞的显微图像计算神经突的长度。施加1 J/cm2能量后,PC12细胞的神经突形成能力和分化率达到最高水平,是对照组的近2倍。5 J/cm2的能量密度对细胞增殖和神经突伸长有明显抑制作用。细胞活力百分比显示,5 J/cm2能量密度对细胞活力的抑制率接近30%。本研究结果强调了光生物调节应用中光参数的调整可能导致生物刺激或生物抑制,这取决于施加在细胞上的强度和辐照水平。
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引用次数: 0
A Machine Learning-Based Approach to Detect Survival of Heart Failure Patients 一种基于机器学习的心力衰竭患者生存率检测方法
Pub Date : 2020-11-19 DOI: 10.1109/TIPTEKNO50054.2020.9299320
Ç. Erdaş, Didem Ölçer
One of the diseases with high prevalence among the consequences of cardiovascular diseases is heart failure. Heart failure is a condition in which the muscles in the heart wall become faded and dilated, limiting the heart’s ability to pump blood. As time passes, the heart cannot meet the proper blood requirement in the body, and as a result, the person has difficulty breathing. As the human age increases, the incidence of heart failure gradually increases, and the rate of mortality due to heart failure also increases. In this context, close monitoring of people suffering from this disease will significantly increase the survival rate. In this study, a machine learning-based system is proposed to predict the mortality-survival status of patients with heart failure. Thus, by identifying people with mortality risk, the survival probability of the patients may increase with more effective and close follow-up.
心衰是心血管疾病中发病率较高的疾病之一。心力衰竭是指心脏壁的肌肉褪色和扩张,限制了心脏泵血的能力。随着时间的推移,心脏不能满足身体正常的血液需求,结果,人就会呼吸困难。随着人类年龄的增长,心力衰竭的发病率逐渐增加,心力衰竭的死亡率也随之增加。在这种情况下,密切监测患有这种疾病的人将大大提高生存率。在这项研究中,提出了一个基于机器学习的系统来预测心力衰竭患者的死亡率-生存状态。因此,通过识别有死亡风险的人群,通过更有效和密切的随访,患者的生存概率可能会增加。
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引用次数: 4
Magnetic levitation-based adipose tissue engineering using horizontal magnet deployment 基于磁悬浮的脂肪组织工程水平磁铁部署
Pub Date : 2020-11-19 DOI: 10.1109/TIPTEKNO50054.2020.9299312
Oyku Sarigil, Muge Anil-Inevi, Esra Yılmaz, Ozge S Ozcelik, Gulistan Mese, H. Tekin, E. Ozcivici
Magnetic levitation is a promising technique for tissue engineering with contact- and label-free approach. Levitation-based biofabrication systems emerge as a simple, rapid and versatile alternative to traditional tissue culture systems, since biofabrication specs can easily be tailored via magnet shape and configuration. This study aims at possible magnetic levitation systems for culture of adipose tissue cells. In this study, we performed two different magnet configurations, vertical and horizontal deployment, in an effort to be utilized in adipose tissue engineering.
磁悬浮技术是一种很有前途的组织工程技术,具有无接触和无标记的特点。基于悬浮的生物制造系统是传统组织培养系统的一种简单、快速和通用的替代方案,因为生物制造规格可以通过磁铁的形状和配置轻松定制。本研究的目的是为脂肪组织细胞的培养提供可能的磁悬浮系统。在这项研究中,我们进行了两种不同的磁铁配置,垂直和水平部署,以努力在脂肪组织工程中使用。
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引用次数: 0
Detection of Cardiac Arrhythmia using Autonomic Nervous System, Gaussian Mixture Model and Artificial Neural Network 应用自主神经系统、高斯混合模型和人工神经网络检测心律失常
Pub Date : 2020-11-19 DOI: 10.1109/TIPTEKNO50054.2020.9299274
M. B. Terzi, V. Arikan
In this study, a new technique which detects anomalies in skin sympathetic nerve activity (SKNA) by using state-of-the-art signal processing and machine learning methods is developed to perform the robust detection of cardiac arrhythmia (CA). For this purpose, a signal processing technique that simultaneously obtains SKNA and ECG from wideband recordings on MIT-BIH database is developed. By using preprocessed data, a novel feature extraction technique which obtains SKNA features that are critical for the reliable detection of CA is developed. By using extracted features, a supervised learning technique based on artificial neural network (ANN) and an unsupervised learning technique based on Gaussian mixture model (GMM) are developed to perform the robust detection of SKNA anomalies. A Neyman-Pearson type of approach is developed to perform the robust detection of outliers that correspond to CA. The performance results of the proposed technique over MIT-BIH database showed that the technique provides highly reliable detection of CA by performing the robust detection of SKNA anomalies. Therefore, in cases where the diagnostic information of ECG is not sufficient for the reliable diagnosis of CA, the proposed technique can provide early diagnosis of the disease, which can lead to a significant reduction in the mortality rates of cardiovascular diseases.
在这项研究中,开发了一种新技术,通过使用最先进的信号处理和机器学习方法来检测皮肤交感神经活动(SKNA)的异常,以执行心律失常(CA)的鲁棒检测。为此,开发了一种从MIT-BIH数据库的宽带记录中同时获得SKNA和ECG的信号处理技术。通过对数据进行预处理,提出了一种新的特征提取技术,该技术可以获得对CA的可靠检测至关重要的SKNA特征。利用提取的特征,提出了基于人工神经网络(ANN)的监督学习技术和基于高斯混合模型(GMM)的无监督学习技术,实现了对SKNA异常的鲁棒检测。开发了一种内曼-皮尔逊类型的方法来执行与CA对应的异常值的鲁棒检测。在麻省理工学院- bih数据库上提出的技术的性能结果表明,该技术通过执行SKNA异常的鲁棒检测,提供了高度可靠的CA检测。因此,在ECG诊断信息不足以对CA进行可靠诊断的情况下,该技术可以提供疾病的早期诊断,从而显著降低心血管疾病的死亡率。
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引用次数: 0
A Preliminary Study on Cell Motility Analysis from Phase-Contrast Microscopy Image Series 从相衬显微镜图像序列分析细胞运动的初步研究
Pub Date : 2020-11-19 DOI: 10.1109/TIPTEKNO50054.2020.9299319
Emre Kayan, ve Tarık Kavuşan, Sevgi Önal, D. P. Okvur, ve Özden Y. Özuysal, B. U. Töreyin, D. Ünay
Analyses of morphology, polarity, and motility of cells is important for cell biology research such as metastatic and invasive capacity of cells, wound healing, and embryonic development. Automation of such analyses using image series of phase-contrast optical microscopy, which allows label-free imaging of live cells in their living environment, is a need. With this purpose, in this study image series of a cell motility experiment is manually annotated, and an automation algorithm realizing motion and shape analyses of cells using the annotated data is developed. In addition, due to the low number of annotated data at hand, a U-Net based solution is devised for automated segmentation of the cells and its performance is evaluated.
细胞形态学、极性和运动性的分析对于细胞生物学的研究非常重要,如细胞的转移和侵袭能力、伤口愈合和胚胎发育。需要使用相衬光学显微镜的图像系列来实现这种分析的自动化,它允许在其生活环境中对活细胞进行无标签成像。为此,本研究对细胞运动实验图像序列进行了手工标注,并开发了一种利用标注数据实现细胞运动和形状分析的自动化算法。此外,由于手头注释数据数量较少,设计了一种基于U-Net的细胞自动分割解决方案,并对其性能进行了评估。
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引用次数: 0
Detection of Covid-19 Patients with Convolutional Neural Network Based Features on Multi-class X-ray Chest Images 基于卷积神经网络特征的多类胸部x线图像新冠肺炎检测
Pub Date : 2020-11-19 DOI: 10.1109/TIPTEKNO50054.2020.9299289
A. Narin
Covid-19 is a very serious deadly disease that has been announced as a pandemic by the world health organization (WHO). The whole world is working with all its might to end Covid-19 pandemic, which puts countries in serious health and economic problems, as soon as possible. The most important of these is to correctly identify those who get the Covid-19. Methods and approaches to support the reverse transcription polymerase chain reaction (RT-PCR) test have begun to take place in the literature. In this study, chest X-ray images, which can be accessed easily and quickly, were used because the covid19 attacked the respiratory systems. Classification performances with support vector machines have been obtained by using the features extracted with residual networks (ResNet-50), one of the convolutional neural network models, from these images. While Covid-19 detection is obtained with support vector machines (SVM)-quadratic with the highest sensitivity value of 96.35% with the 5-fold cross-validation method, the highest overall performance value has been detected with both SVM-quadratic and SVM-cubic above 99%. According to these high results, it is thought that this method, which has been studied, will help radiology specialists and reduce the rate of false detection.
Covid-19是一种非常严重的致命疾病,已被世界卫生组织(世卫组织)宣布为大流行。全世界都在竭尽全力尽快结束Covid-19大流行,这使各国陷入严重的卫生和经济问题。其中最重要的是正确识别感染Covid-19的人。支持逆转录聚合酶链反应(RT-PCR)检测的方法和途径已经开始出现在文献中。在这项研究中,由于covid - 19攻击了呼吸系统,因此使用了可以轻松快速访问的胸部x射线图像。利用残差网络(ResNet-50)(一种卷积神经网络模型)从这些图像中提取的特征,获得了支持向量机的分类性能。采用5倍交叉验证方法,支持向量机二次型检测新冠肺炎的灵敏度最高,为96.35%,支持向量机二次型和支持向量机三次型检测的综合性能值均在99%以上。根据这些高结果,人们认为这种已经研究过的方法将有助于放射学专家并降低误检率。
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引用次数: 17
Covid-19 Classification Using Deep Learning in Chest X-Ray Images 在胸部x射线图像中使用深度学习进行Covid-19分类
Pub Date : 2020-11-19 DOI: 10.1109/TIPTEKNO50054.2020.9299315
Z. Karhan, F. Akal
Covid-19 virus, which has emerged in the Republic of China in an undetermined cause, has affected the whole world quickly. It is important to detect positive cases early to prevent further spread of the outbreak. In the diagnostic phase, radiological images of the chest are determinative as well as the RT-PCR (Reverse Transcription-Polymerase Chain Reaction) test. It was classified with the ResNet50 model, which is a convolutional neural network architecture in Covid-19 detection using chest x-ray images. Chest X-Ray image analysis can be done and infected individuals can be identified thanks to artificial intelligence quickly. The experimental results are encouraging in terms of the use of computer-aided in the field of pathology. It can also be used in situations where the possibilities and RT-PCR tests are insufficient.
新冠肺炎疫情在中华民国出现,原因不明,迅速波及全球。重要的是及早发现阳性病例,以防止疫情进一步蔓延。在诊断阶段,胸部放射图像和RT-PCR(逆转录聚合酶链反应)测试是决定性的。它被归类为ResNet50模型,这是一种利用胸部x射线图像检测新冠病毒的卷积神经网络架构。借助人工智能,可以快速进行胸部x光图像分析,并识别出感染者。在病理学领域使用计算机辅助方面,实验结果令人鼓舞。它也可用于可能性和RT-PCR检测不足的情况。
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引用次数: 29
EEG based Epileptic Seizures Detection using Intrinsic Time-Scale Decomposition 基于内禀时间尺度分解的脑电图癫痫发作检测
Pub Date : 2020-11-19 DOI: 10.1109/TIPTEKNO50054.2020.9299262
Murside Degirmenci, A. Akan
Epilepsy is a type of neurological disorder that causes abnormal brain activities and creates epileptic seizures. Traditionally epileptic seizure prediction is realized with a visual examination of Electroencephalogram (EEG) signals. But this technique needs a long time EEG monitoring. So, the automatic epileptic seizures prediction schemes become a requirement at this point. This study proposes a method to classify epileptic seizures and normal EEG data by utilizing the Intrinsic Time-scale Decomposition (ITD)-based features. The dataset has been supplied from the database of the Epileptology Department of Bonn University. It contains 5 data groups A, B, C, D, E. The study aims to classify healthy and epileptic data, so data of groups A and E are used to perform evaluations of proposed methods. The EEG data are decomposed into Proper Rotation Components (PRCs) by ITD. The feature extraction methods are applied to the first five PRCs of each EEG data from healthy and epileptic individuals. These features are classified using K-Nearest Neighbors (KNN), Linear Discriminant Analysis (LDA), Naive Bayes, Support Vector Machine (SVM) and Logistic Regression classifiers. The results demonstrated that the epileptic data is differentiated from normal data by applying the nonlinear ITD with outstanding classification performance.
癫痫是一种神经系统疾病,会导致大脑活动异常,并导致癫痫发作。传统的癫痫发作预测是通过脑电图(EEG)信号的视觉检查来实现的。但该技术需要长时间的脑电图监测。因此,癫痫发作的自动预测方案在这一点上成为一种需求。本研究提出了一种利用固有时间尺度分解(ITD)特征对癫痫发作和正常脑电图数据进行分类的方法。数据集来自波恩大学癫痫学系的数据库。它包含A, B, C, D, E 5组数据。本研究的目的是对健康数据和癫痫数据进行分类,因此使用A组和E组的数据对所提出的方法进行评估。利用ITD将脑电数据分解为适当旋转分量(PRCs)。将特征提取方法应用于健康和癫痫个体的每个EEG数据的前五个prc。这些特征使用k近邻(KNN)、线性判别分析(LDA)、朴素贝叶斯、支持向量机(SVM)和逻辑回归分类器进行分类。结果表明,应用非线性过渡段可将癫痫数据与正常数据区分开来,分类效果较好。
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引用次数: 2
期刊
2020 Medical Technologies Congress (TIPTEKNO)
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