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2010 17th Iranian Conference of Biomedical Engineering (ICBME)最新文献

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Effect of electrical activity feedback on cognition 脑电活动反馈对认知的影响
2010 17th Iranian Conference of Biomedical Engineering (ICBME) Pub Date : 2010-11-01 DOI: 10.1109/ICBME.2010.5704923
M. Nazari, P. Berquin
{"title":"Effect of electrical activity feedback on cognition","authors":"M. Nazari, P. Berquin","doi":"10.1109/ICBME.2010.5704923","DOIUrl":"https://doi.org/10.1109/ICBME.2010.5704923","url":null,"abstract":"The goal of physiological computing, i.e. brain-computer interface (BCI) is to transform bioelectrical signals from the human nervous system into computer in order to enhance and enrich the interactive experience. In this line, effect of electroencephalographic rhythm feedback (EEG biofeedback) has been investigated on different domains of cognitive functioning of Attention-deficit/hyperactivity disorder (ADHD). This approach is argued to be an effective method for treating children with ADHD. This study was performed to evaluate the effectiveness of this method. Participants were 26 children with ADHD aged between 7–12 years. Via electrical activity feedback, thirteen children were trained to enhance the power of the beta1 activity (15–18 Hz) and decrease the power of the theta activity (4–8 Hz), and 13 of which were treated with methylphenidate alone. Neuropsychological and experimental tests were administered before and after intervention. Both methods were associated with improvements on the variability and accuracy measures of computerized test. Intellectual ability increased also by both methods.","PeriodicalId":377764,"journal":{"name":"2010 17th Iranian Conference of Biomedical Engineering (ICBME)","volume":"14 7","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132707913","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: 4
Feasibility study of a new approach for reducing of partial volume averaging artifact in CT scanner 一种减小CT扫描仪局部体积平均伪影新方法的可行性研究
2010 17th Iranian Conference of Biomedical Engineering (ICBME) Pub Date : 2010-11-01 DOI: 10.1109/ICBME.2010.5704968
Hossein ARABI, A. K. Kamali Asl
{"title":"Feasibility study of a new approach for reducing of partial volume averaging artifact in CT scanner","authors":"Hossein ARABI, A. K. Kamali Asl","doi":"10.1109/ICBME.2010.5704968","DOIUrl":"https://doi.org/10.1109/ICBME.2010.5704968","url":null,"abstract":"Partial volume averaging is one of the most prevalent artifacts in computed tomography (CT) that threatens the diagnostic interpretation by giving the misleading density of a voxel. This paper proposes a novel approach for reducing of partial volume averaging artifact in CT called dual scan method. The idea behind this work is to acquire two sinograms of the object while detector is slightly shifted in x-axis. Then a computer program simultaneously processes the two sinograms and extracts a new sinogram with double spatial resolution and less partial volume artifact. To evaluate this method, a model based on an actual CT scanner was simulated in GATE Monte Carlo code. An exclusive phantom was designed for investigation of partial volume averaging artifact. The phantom consisted of two materials with densities of 1.2 and 1.6 g/cm3. Because of partial volume averaging artifact the reconstructed image of the phantom revealed the density of 1.4 g/cm3 and also the spatial resolution of the system obtained 0.4 mm. After applying the dual scan method to the CT scanner, not only did the spatial resolution of the system improved to 0.2 mm but also the partial volume averaging artifact decreased up to 50% and density of each materials of the phantom was detected exactly.","PeriodicalId":377764,"journal":{"name":"2010 17th Iranian Conference of Biomedical Engineering (ICBME)","volume":"225 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133270703","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: 16
Application of Empirical Mode Decomposition in prediction of acute hypotension episodes 经验模态分解在急性低血压发作预测中的应用
2010 17th Iranian Conference of Biomedical Engineering (ICBME) Pub Date : 2010-11-01 DOI: 10.1109/ICBME.2010.5704929
A. Arasteh, Amin Janghorbani, M. Moradi
{"title":"Application of Empirical Mode Decomposition in prediction of acute hypotension episodes","authors":"A. Arasteh, Amin Janghorbani, M. Moradi","doi":"10.1109/ICBME.2010.5704929","DOIUrl":"https://doi.org/10.1109/ICBME.2010.5704929","url":null,"abstract":"Acute hypotension episodes are one of the hemodynamic instabilities with high mortality rate that is frequent among many groups of patients. Prediction of acute hypotension episodes can help clinicians to diagnose the cause of this physiological disorder and select proper treatment based on this diagnosis. In this study Empirical Mode Decomposition of Mean Arterial Pressure (MAP) time series were calculated and some features such as statistical features of Intrinsic Mode Functions (IMFs) were extracted. Finally, a Support Vector Machine (SVM) was applied for classification of these features and prediction of acute hypotension episodes. The accuracy of prediction was 92% with Leave One Out cross validation method.","PeriodicalId":377764,"journal":{"name":"2010 17th Iranian Conference of Biomedical Engineering (ICBME)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130296205","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: 8
Acquiring of muscle forces of a normal foot during miscellaneous postures of gait 在步态的各种姿势中获得正常足的肌肉力量
2010 17th Iranian Conference of Biomedical Engineering (ICBME) Pub Date : 2010-11-01 DOI: 10.1109/ICBME.2010.5704987
Mohsen Sadeghimehr, Z. Salimi, M. Karami
{"title":"Acquiring of muscle forces of a normal foot during miscellaneous postures of gait","authors":"Mohsen Sadeghimehr, Z. Salimi, M. Karami","doi":"10.1109/ICBME.2010.5704987","DOIUrl":"https://doi.org/10.1109/ICBME.2010.5704987","url":null,"abstract":"The purpose of this paper is presenting a multi-segment static model of the foot, in order to find muscle forces of the leg and foot in miscellaneous posture of gait. To obtain an exact knowledge about magnitude and location of forces in various parts of the foot, a more precise foot model is needed. In the present study, a four segment musculoskeletal model of foot (hallux, forefoot and hindfoot plus one segment for tibia) is used to assess the foot during gait. Input parameters of the model are relative angles between different segments of the model and ground reaction forces on the first metatarsal and heel. Then, the main muscles are added to the model, and Newton equations of equilibrium are applied to study the inverse dynamic of the problem. Since several muscles act in foot motion, the number of unknown parameters in the equations is greater than the number of known ones. Therefore, with the aim of optimizing Euclidean norm of muscle forces, an optimal solution for the problem is found.","PeriodicalId":377764,"journal":{"name":"2010 17th Iranian Conference of Biomedical Engineering (ICBME)","volume":"107 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115682711","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
3 dimensional finite element analysis of the human wrist joint without ligaments under compressive loads 压缩载荷下无韧带人腕关节的三维有限元分析
2010 17th Iranian Conference of Biomedical Engineering (ICBME) Pub Date : 2010-11-01 DOI: 10.1109/ICBME.2010.5704996
Aryan Javanmardian, M. Haghpanahi
{"title":"3 dimensional finite element analysis of the human wrist joint without ligaments under compressive loads","authors":"Aryan Javanmardian, M. Haghpanahi","doi":"10.1109/ICBME.2010.5704996","DOIUrl":"https://doi.org/10.1109/ICBME.2010.5704996","url":null,"abstract":"Damage of carpal ligaments is very common in daily living. Yet its mechanical behavior on the carpal bones is unclear when the ligaments are omitted from the carpal joints. In this study, our goal was to perform a computational analysis of the carpal biomechanics without ligaments. A three-dimensional finite element model of the wrist was constructed which includes the carpal bones, the cartilages and the proximal metacarpals. All of the bones were modeled with the cartilage layers smoothly embedded in them. 100-Newton pressure load was applied to the upper section of the second and the third metacarpals. The effect of dividing ligaments on the contact stress distribution in the Radio-Scaphoid, the Radio-Lunate and the mid-carpal joints were studied. By dividing the ligaments, all the carpal bones are moved to the radius direction. Therefore the contact stresses in the radio-scaphoid & the radio-lunate are increased. Furthermore, the contact stress between the mid-carpal joints changed little.","PeriodicalId":377764,"journal":{"name":"2010 17th Iranian Conference of Biomedical Engineering (ICBME)","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114724848","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: 7
Modelling silicone finger joint implant 硅胶手指关节植入物建模
2010 17th Iranian Conference of Biomedical Engineering (ICBME) Pub Date : 2010-11-01 DOI: 10.1109/ICBME.2010.5705007
A. Salamat, D. Shepherd
{"title":"Modelling silicone finger joint implant","authors":"A. Salamat, D. Shepherd","doi":"10.1109/ICBME.2010.5705007","DOIUrl":"https://doi.org/10.1109/ICBME.2010.5705007","url":null,"abstract":"There are different reasons which may result in a need for finger joint arthroplasty, the main reason is thought to be rheumatoid arthritis (RA).","PeriodicalId":377764,"journal":{"name":"2010 17th Iranian Conference of Biomedical Engineering (ICBME)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116962568","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
Design of a SAW-based sensor combined with a micro-hotplate for biological applications 结合生物微热板的电锯传感器设计
2010 17th Iranian Conference of Biomedical Engineering (ICBME) Pub Date : 2010-11-01 DOI: 10.1109/ICBME.2010.5704972
B. V. Lahijani, H. Badri Ghavifekr
{"title":"Design of a SAW-based sensor combined with a micro-hotplate for biological applications","authors":"B. V. Lahijani, H. Badri Ghavifekr","doi":"10.1109/ICBME.2010.5704972","DOIUrl":"https://doi.org/10.1109/ICBME.2010.5704972","url":null,"abstract":"A SAW-based sensor for chemical and biological application is designed in this paper. An Aluminum nitride piezoelectric layer is used over a bulk micromachined silicon substrate, so the design is compatible with CMOS Process. An additional micro-hotplate is integrated on system for thermal adjustment of sensing layer on required temperature and thermal stabilization of whole sensor. The SAW device with a working frequency of 610 MHz is built over a 21µm membrane. The frequency response and sensing property of the sensor are achieved via finite element analysis. The temperature distribution of the micro-hotplate is demonstrated.","PeriodicalId":377764,"journal":{"name":"2010 17th Iranian Conference of Biomedical Engineering (ICBME)","volume":"69 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116205652","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: 1
A new approach for numerical solution of nonlinear singular boundary value problems arising in physiology 生理学非线性奇异边值问题数值解的新方法
2010 17th Iranian Conference of Biomedical Engineering (ICBME) Pub Date : 2010-11-01 DOI: 10.1109/ICBME.2010.5704981
K. Maleknejad, E. Hashemizadeh
{"title":"A new approach for numerical solution of nonlinear singular boundary value problems arising in physiology","authors":"K. Maleknejad, E. Hashemizadeh","doi":"10.1109/ICBME.2010.5704981","DOIUrl":"https://doi.org/10.1109/ICBME.2010.5704981","url":null,"abstract":"In this work a class of nonlinear singular ordinary differential equations, that arises in the study of various tumor growth problems, steady state oxygen diffusion in spherical cell with Michaelis-Menten uptake kinetics and the distribution of heat sources in the human head, is solved by a new method based on shifted Legendre polynomials. Operational matrices of derivatives for this function are presented to reduce the nonlinear singular boundary value problems that arise in physiology to a system of nonlinear algebraic equations. The method is computationally very simple and attractive, and applications are demonstrated through illustrative examples.","PeriodicalId":377764,"journal":{"name":"2010 17th Iranian Conference of Biomedical Engineering (ICBME)","volume":"72 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116217110","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
A novel method for mass spectrometry data representation and analysis 质谱数据表示与分析的新方法
2010 17th Iranian Conference of Biomedical Engineering (ICBME) Pub Date : 2010-11-01 DOI: 10.1109/ICBME.2010.5705024
M. Alipoor, J. Haddadnia
{"title":"A novel method for mass spectrometry data representation and analysis","authors":"M. Alipoor, J. Haddadnia","doi":"10.1109/ICBME.2010.5705024","DOIUrl":"https://doi.org/10.1109/ICBME.2010.5705024","url":null,"abstract":"In this paper a novel representation/analysis method on high throughput SELDI-TOF mass-spectroscopy data is developed. To avoid complexity of conventional methods, mass spectrum is converted to an intensity image and then image processing techniques is implemented to solve the cancer classification problem. The proposed system benefits a thoroughly novel and efficient idea to design an image-based pattern recognition system for cancer classification. The system is successfully validated using a well-known ovarian cancer proteomic dataset. Results of applying the method are comparable to state of the art methods in proteomic pattern recognition.","PeriodicalId":377764,"journal":{"name":"2010 17th Iranian Conference of Biomedical Engineering (ICBME)","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122142375","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
Activities study of PET's radioisotopes production with plasma focus devices 等离子体聚焦装置生产PET放射性同位素的活度研究
2010 17th Iranian Conference of Biomedical Engineering (ICBME) Pub Date : 2010-11-01 DOI: 10.1109/ICBME.2010.5704965
V. Razazi, R. M. Gharehbagh
{"title":"Activities study of PET's radioisotopes production with plasma focus devices","authors":"V. Razazi, R. M. Gharehbagh","doi":"10.1109/ICBME.2010.5704965","DOIUrl":"https://doi.org/10.1109/ICBME.2010.5704965","url":null,"abstract":"In recent years, the request for radioisotopes has been increasing steadily. Experiments in the past five years have demonstrated production of Short-Lived radioisotopes (SLRs) with a plasma focus devices. Radioisotope activity only a few microcuries have been obtained from single discharges in small scale plasma focus machines and at high pulse repetition rate in large and high energy plasma focus devices and these devices will be used to breed Short-Lived radioisotopes (SLRs) for positron emission medical examination such as PET.","PeriodicalId":377764,"journal":{"name":"2010 17th Iranian Conference of Biomedical Engineering (ICBME)","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2010-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127309767","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
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