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2020 Medical Technologies Congress (TIPTEKNO)最新文献

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Demonstration of G-quadruplex-assisted hybridization chain reaction for nucleic acid detection 核酸检测中g -四聚体辅助杂交链反应的演示
Pub Date : 2020-11-19 DOI: 10.1109/TIPTEKNO50054.2020.9299304
B. Kanat, H. S. Portakal, O. Doluca
In recent years, the hybridization chain reaction (HCR) has been proposed as an alternative to polymerase chain reaction (PCR) for diagnosis. Unfortunately, the sensitivity of the HCR methods are still far below PCR and researchers focus on ways to improve it by investigating different HCR designs. While earlier designs exploit fluorescently labelled probes for detection, here we propose an HCR system that combines G-quadruplex formation and fluorescence for detection of single stranded DNA sequences with concentrations as low as 20 pM. We show that Gquadruplex-mediated oxidation of Amplex Red results in fluorescence increase and lowers the detection limit by about 10fold, in comparison to HCR using only fluorescently labelled HCR probes.
近年来,杂交链反应(HCR)被提出作为一种替代聚合酶链反应(PCR)的诊断方法。不幸的是,HCR方法的灵敏度仍然远远低于PCR,研究人员致力于通过研究不同的HCR设计来改进它。虽然早期的设计利用荧光标记探针进行检测,但在这里,我们提出了一种结合g -四重体形成和荧光的HCR系统,用于检测浓度低至20 pM的单链DNA序列。我们发现,与仅使用荧光标记的HCR探针的HCR相比,gfour - plex介导的Amplex Red氧化导致荧光增加,并降低了约10倍的检测限。
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引用次数: 1
Machine Learning In Bioinformatics: Gene Expression And Microarray Studies 生物信息学中的机器学习:基因表达和微阵列研究
Pub Date : 2020-11-19 DOI: 10.1109/TIPTEKNO50054.2020.9299285
Beyza Bağiröz, E. Doruk, O. Yıldız
Machine learning methods used in the field of bioinformatics are a frequently used solution method in diagnosing, treating and investigating the underlying causes of diseases. In addition, it is an important field of study that allows for the ease of processing, the provision of computational power and the diversity of computational tools specific to the subject, especially in processes that require processing on gene expression and microarray data sets. In this study, an introduction has been made on the use of machine learning methods in the field of bioinformatics gene expression, and the use of machine learning methods has been exemplified by recent studies.
生物信息学领域中使用的机器学习方法是诊断、治疗和调查疾病潜在原因的常用解决方法。此外,这是一个重要的研究领域,它允许易于处理,提供计算能力和特定于主题的计算工具的多样性,特别是在需要处理基因表达和微阵列数据集的过程中。在本研究中,介绍了机器学习方法在生物信息学基因表达领域的应用,并通过最近的研究举例说明了机器学习方法的使用。
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引用次数: 2
Use of Velocity Vectors for Cell Classification Under Acoustic Drifting Forces 声波漂移力作用下速度矢量对细胞分类的应用
Pub Date : 2020-11-19 DOI: 10.1109/TIPTEKNO50054.2020.9299222
Rahmetullah Varol, Sevde Omeroglu, Z. Karavelioglu, Ela Kumuk, Eda Nur Saruhan, Gizem Aydemir, M. E. Oruc, H. Uvet
This study reports a novel cell classification method based on the observation of trajectories that cells inside a fluidic chamber follow under an externally applied acoustic field. Proposed method is significant both as a cell classification method and as a method for characterizing the motion of various cell lines under different surface acoustic wave patterns. The difference is mainly due to the characteristic differences of cells such as mass, surface adhesiveness, cell stiffness and cellular volume. We discuss the mechanisms that affect the interaction between human colon carcinoma cell line (HCT116), human umbilical vein endothelial cells (HUVECs) and leukocyte cells and surface waves. Classification performance is tested using SVM, max-likelihood and MLP methods and accuracy, sensitivity and specificity values are reported for each. The results indicate that the method can be used as a powerful classifier particularly for cells that are hard to distinguish visually. It is observed that for a given frequency, the motion characteristics of different cell lines differ due to the difference between their mechanical properties for that particular line. This observation can be utilized for the development of a frequency based predictive cell manipulation method that is able to target specific cells using their characteristic frequencies. We discuss the potential of the proposed acoustic stimulation method as a cell manipulation technique.
本研究报告了一种新的细胞分类方法,该方法基于观察在外部声场作用下流体腔内细胞的运动轨迹。该方法作为一种细胞分类方法和表征不同表面声波模式下各种细胞系运动的方法具有重要意义。这种差异主要是由于细胞的质量、表面粘附性、细胞刚度和细胞体积等特性的差异。我们讨论了影响人结肠癌细胞系(HCT116)、人脐静脉内皮细胞(HUVECs)和白细胞与表面波相互作用的机制。使用支持向量机、最大似然和MLP方法测试分类性能,并报告每种方法的准确性、灵敏度和特异性值。结果表明,该方法可以作为一种强大的分类器,特别是对于难以视觉区分的细胞。可以观察到,对于给定的频率,不同细胞系的运动特性不同,这是由于它们在该特定细胞系的机械特性之间的差异。这一观察结果可用于开发基于频率的预测细胞操作方法,该方法能够利用其特征频率靶向特定细胞。我们讨论了提出的声刺激方法作为细胞操作技术的潜力。
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引用次数: 0
Heating/Cooling Block System Design with Thermoelectric Module 热电模块加热/冷却模块系统设计
Pub Date : 2020-11-19 DOI: 10.1109/TIPTEKNO50054.2020.9299259
A. Kavsaoğlu, V. Demir, Havva Sungur
The aim of this study is to design and develop a system for polymerase chain reaction devices. Temperature is an important criterion for the realization of polymerase chain reactions, which is a simple and precise technique. Equal temperature stability must be achieved on the hopper aluminum block used for the placement of PCR tubes in equal time. By using the Peltier effect of the thermoelectric module, electric energy is converted to heat energy due to the temperature difference between the surfaces. In the study, the Peltier effect is to ensure that the samples placed in the aluminum block are kept at the desired temperature during the desired time. The thermoelectric modules used for this system were operated in heating/cooling modes and the values obtained with the temperature sensor used were drawn as temperature-time graph on the interface screen designed momentarily. PCR devices are commonly used in the areas of DNA amplifications, activation of incubation and cultures, serum coagulation, melting/boiling points, nucleic acid hydridizations, and PCR testing.
本研究的目的是设计和开发一个聚合酶链反应装置系统。温度是实现聚合酶链反应的重要标准,是一种简单、精确的技术。在相同的时间内,用于放置PCR管的料斗铝块必须达到相同的温度稳定性。利用热电模块的珀尔帖效应,由于表面之间的温差,电能转化为热能。在本研究中,珀尔帖效应是为了确保放置在铝块中的样品在所需时间内保持在所需温度。该系统所使用的热电模块在加热/冷却模式下工作,所使用的温度传感器得到的数值以温度-时间图的形式绘制在设计的界面屏幕上。PCR装置通常用于DNA扩增、孵育和培养的激活、血清凝固、熔点/沸点、核酸水化和PCR检测等领域。
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引用次数: 0
A Novel Parametric Approach for Generating Subject Specific Lumbar Vertebral Bodies 一种新的参数化方法生成受试者特定的腰椎椎体
Pub Date : 2020-11-19 DOI: 10.1109/TIPTEKNO50054.2020.9299224
Ufuk Tan Baler, A. F. Okyar
Analysis of the mechanical response of the lumbar vertebral body (VB) under certain loading conditions requires a numerical model, which is the building block directly used by finite element method (FEM). Yet, such model comes with drawbacks to deal with in the generation process. The difficulties are related to lacking data integrity provided by subject-specific computed tomography (CT) scan. In order to get through the obstacles, deterministic nature of the parametric computer-aided design (CAD) modeling is adopted. Six parameters, which create a parametric curve on a cross-sectional slice image of a VB; are optimized such that best fits are obtained on fifteen slices grouped as three for each Ll, L2, L3, L4, and L5 VBs. Then, total of 72 construction points necessary to create fifteen contours, in an open-source CAD software called FreeCAD, are transformed from fifteen slice images to a global Cartesian coordinate system (CSYS) by the transformation matrices. After transforming construction points, groups of three contours are lofted to create the lumbar CAD model including only VB section. Finally, this model is compared with another parametric model in terms of Hausdorff distance (HD).
分析腰椎在一定载荷条件下的力学响应需要一个数值模型,而数值模型是有限元法(FEM)直接使用的基础。然而,这种模型在生成过程中也存在一些缺点。困难在于缺乏特定对象的计算机断层扫描(CT)所提供的数据完整性。为了克服这些障碍,采用了参数化计算机辅助设计(CAD)建模的确定性特性。六个参数,在VB的横截面切片图像上创建参数曲线;进行了优化,以便在15个片上获得最佳拟合,这些片分为3个,分别对应Ll、L2、L3、L4和L5个VBs。然后,在一个名为FreeCAD的开源CAD软件中,通过变换矩阵将15个切片图像转换为全局笛卡尔坐标系(CSYS),总共需要72个施工点来创建15个轮廓。变换施工点后,将三组轮廓线放样,生成仅含VB剖面的腰椎CAD模型。最后,将该模型与另一种参数模型在豪斯多夫距离(HD)方面进行比较。
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引用次数: 0
Classification of Ultrasonographic Thyroid Tumor Images to TIRADS Categories via Texture Analysis Methods 基于纹理分析方法的甲状腺肿瘤超声图像TIRADS分类
Pub Date : 2020-11-19 DOI: 10.1109/TIPTEKNO50054.2020.9299284
Aslan Berk Tüzüner, ve Osman Eroğul, G. Atac, V. Er
Thyroid tumors frequently observed disease by using medical imaging methods. Ultrasonography is the most frequently performed method for diagnosis. To determine, tumor is benign or malign, experienced doctors use various techniques. Fine needle aspiration biopsy and follow-up checking are used for determining type of tumor. However, these methods are time consuming and increasing work load of doctors. So, they created a risk stratification system which has called as ACR-TIRADS. Downside of this system is being subjective and for multiple tumors, it will be time consuming due to analyzing multiple features. To ease, doctors work load and help them to obtain more objective classification, on this study we worked thyroid tumors with texture analysis methods and tried to classify them, to their TIRADS classes. As the result of this study, sensitivity found up %82.8, precision %85 and accuracy found up %73.0.
甲状腺肿瘤是医学影像学观察的常见病。超声检查是最常用的诊断方法。为了确定肿瘤是良性的还是恶性的,有经验的医生使用各种技术。采用细针穿刺活检及随访检查确定肿瘤类型。然而,这些方法既耗时又增加了医生的工作量。因此,他们创建了一个风险分层系统称为ACR-TIRADS。该系统的缺点是主观性强,对于多发肿瘤,需要分析多种特征,耗时长。为了减轻医生的工作量,帮助他们获得更客观的分类,在本研究中,我们用纹理分析的方法对甲状腺肿瘤进行分类,并尝试将其分类到其TIRADS类。结果表明,灵敏度提高%82.8,精密度提高%85,准确度提高%73.0。
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引用次数: 0
Hyaluronic Acid Production and Analysis from Rooster Comb 鸡冠透明质酸的生成及分析
Pub Date : 2020-11-19 DOI: 10.1109/TIPTEKNO50054.2020.9299240
C. Kalkandelen, Sena Su, Elif Saatçioğlu, O. Gündüz
Hyaluronic acid (HA) is a linear natural polymer, polysaccharide, with a high water affinity, biocompatible, called glucosaminoglycan. It is the preferred material in bioengineering research with its biodegradability, biodegradability and biofunctionality. In this study, hyaluronic acid was produced by chemical extraction from the rooster needle, which has not been evaluated much in our country. In addition, Fourier Transform Infrared Spectroscopy and Proton Nuclear Magnetic Resonance Spectroscopy analysis of the produced hyaluronic acid was performed. As a result, it has been shown that hyaluronic acid, a product with high added value, can be produced from cock crests by chemical methods.
透明质酸(HA)是一种线性天然聚合物、多糖,具有较高的亲水性、生物相容性,称为葡萄糖氨基聚糖。它具有生物可降解性、生物可降解性和生物功能,是生物工程研究的首选材料。本研究采用化学提取法从鸡针中提取透明质酸,该方法在国内评价较少。此外,对制备的透明质酸进行了傅里叶变换红外光谱和质子核磁共振光谱分析。结果表明,用化学方法从鸡冠中提取透明质酸是一种高附加值产品。
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引用次数: 0
Robotic Assisted Passive Wrist and Forearm Rehabilitation: Design of an Exoskeleton and Implementation 机器人辅助被动手腕和前臂康复:外骨骼的设计和实现
Pub Date : 2020-11-19 DOI: 10.1109/TIPTEKNO50054.2020.9299251
M. E. Kütük, M. T. Das, L. Dülger
An exoskeleton for human wrist and forearm rehabilitation has been designed and manufactured. Considering the torque values required for daily life activities, a structural analysis study has been presented. It has three degrees of freedom (DOF) which must be fitted to real human wrist and forearm. Anatomical motion ranges of human limbs have been taken into account during design. IMU has been used in order to get the kinematic values of the limbs and to evaluate the performance level of the therapy. Adapting a six DOF Denso robot to rehabilitation has been completed and experiments have been performed.
设计并制造了一种用于人类手腕和前臂康复的外骨骼。考虑到日常生活活动所需的扭矩值,提出了结构分析研究。它有三个自由度(DOF),必须适合真实的人的手腕和前臂。在设计时考虑了人体肢体的解剖运动范围。为了得到肢体的运动值和评价治疗的效果水平,使用了IMU。完成了六自由度电装机器人的康复改造,并进行了实验。
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引用次数: 0
EEG Sinyallerinde Epilepsi ve Psödo (sahte) Nöbetlerinin Belirlenmesi: Kısa Derleme Detection Methods of Pseudo and Epileptic Seizures from EEG signals: A Short Review
Pub Date : 2020-11-19 DOI: 10.1109/TIPTEKNO50054.2020.9299270
Şeyma Yol, G. Tohumoglu
The seizure is a chain of abnormal neurological functions caused by the abnormal electrical discharge of neurons in the brain. The most common is epileptic seizures (ES) which are caused by sudden and uncontrolled electrical discharges in brain cells. A routine 20-minute electroencephalogram (EEG) determines whether the brain’s electrical activity is normal, or the presence of an electrical focus leading to epilepsy. However, the only EEG test by itself is not enough to establish a diagnosis of epileptic seizures. Another seizure known as Psychogenic Nonepileptic Seizures (PNES) is not involuntary electrical abnormal discharges results from psychological conditions rather than brain function. PNES can mimic the many manifestations of epilepsy. The similarity of these two types of seizures poses diagnostic challenges that often lead to delayed diagnosis of PNES. The diagnosis of PNES also involves high-cost hospital admission and monitoring using video-electroencephalogram machines (VEM). Due to economic feasibility and the tediousness of VEM, alternative methods are being researched to differentiate PNES and ES. In this study, we present a summary of the methods and obtained results for epileptic and non-epileptic (pseudo) seizure detection in the literature.
癫痫发作是由大脑神经元异常放电引起的一系列神经功能异常。最常见的是癫痫发作(ES),这是由脑细胞突然和不受控制的放电引起的。常规的20分钟脑电图(EEG)可以确定大脑的电活动是否正常,或者是否存在导致癫痫的电焦点。然而,唯一的脑电图检查本身并不足以确定癫痫发作的诊断。另一种被称为心因性非癫痫性发作(PNES)的癫痫发作不是由心理状况而不是大脑功能引起的非自愿的异常放电。PNES可以模仿癫痫的许多表现。这两种类型癫痫发作的相似性给诊断带来了挑战,往往导致PNES的诊断延迟。PNES的诊断还涉及高费用的住院治疗和使用视频脑电图仪(VEM)进行监测。由于VEM的经济可行性和繁琐性,人们正在研究区分PNES和ES的替代方法。在这项研究中,我们提出的方法和获得的结果癫痫和非癫痫性(伪)发作检测的文献摘要。
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引用次数: 0
Detection of Myocardial Infarction using Autonomic Nervous System, Gaussian Mixture Model and Artificial Neural Network 自主神经系统、高斯混合模型和人工神经网络检测心肌梗死
Pub Date : 2020-11-19 DOI: 10.1109/TIPTEKNO50054.2020.9299275
M. B. Terzi, V. Arikan
In this study, a new technique which detects anomalies in skin sympathetic nerve activity (SKNA) and ECG by using state-of- the-art signal processing and machine learning methods is developed to perform the robust detection of myocardial infarction (MI). For this purpose, a signal processing technique that simultaneously obtains SKNA and ECG from wideband recordings on PTB-EKG database is developed. By using preprocessed data, a novel feature extraction technique which obtains SKNA features that are critical for the reliable detection of MI 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 MI. The performance results of the proposed technique over PTB-EKG database showed that the technique provides highly reliable detection of MI 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 MI, the proposed technique can provide early diagnosis of the disease, which can lead to a significant reduction in the mortality rates of cardiovascular diseases.
在本研究中,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)和心电图的异常,以执行心肌梗死(MI)的鲁棒检测。为此,开发了一种从PTB-EKG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,该技术可以获得对心肌梗死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Neyman-Pearson类型的方法来执行与MI对应的异常值的鲁棒检测。所提出的技术在PTB-EKG数据库上的性能结果表明,该技术通过执行SKNA异常的鲁棒检测,提供了高度可靠的MI检测。因此,在心电图诊断信息不足以可靠诊断心肌梗死的情况下,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
期刊
2020 Medical Technologies Congress (TIPTEKNO)
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