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

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A fast image registration algorithm for Digital Subtraction Angiography 数字减影血管造影的快速图像配准算法
2010 17th Iranian Conference of Biomedical Engineering (ICBME) Pub Date : 2010-11-01 DOI: 10.1109/ICBME.2010.5704959
M. Nejati, R. Amirfattahi, S. Sadri
{"title":"A fast image registration algorithm for Digital Subtraction Angiography","authors":"M. Nejati, R. Amirfattahi, S. Sadri","doi":"10.1109/ICBME.2010.5704959","DOIUrl":"https://doi.org/10.1109/ICBME.2010.5704959","url":null,"abstract":"Digital Subtraction Angiography (DSA) is a powerful technique for the visualization of blood vessels. The major problem encountered in DSA images is the presence of motion artifacts which arise from the misalignment of successive images in the sequence. In this paper, a fast registration algorithm for coronary angiographic images is proposed. It involves a feature-based selection of control points for which the displacement is computed by means of template matching, and the complete displacement vector field is constructed by means of interpolation. To reduce the computational cost of the template matching procedure, an iterative hill-climbing approach is used for optimization and for handling the local misalignments, the image warping is performed based on multilevel B-spline interpolation.","PeriodicalId":377764,"journal":{"name":"2010 17th Iranian Conference of Biomedical Engineering (ICBME)","volume":"62 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":"132954862","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
Preparation of sol-gel derived hydroxyapatite/yttria stabilized zirconia nanocomposite coatings on 316 L stainless steel 316l不锈钢表面羟基磷灰石/氧化钇稳定氧化锆纳米复合涂层的制备
2010 17th Iranian Conference of Biomedical Engineering (ICBME) Pub Date : 2010-11-01 DOI: 10.1109/ICBME.2010.5705016
S. Salehi, Mohammadhossein Fathi
{"title":"Preparation of sol-gel derived hydroxyapatite/yttria stabilized zirconia nanocomposite coatings on 316 L stainless steel","authors":"S. Salehi, Mohammadhossein Fathi","doi":"10.1109/ICBME.2010.5705016","DOIUrl":"https://doi.org/10.1109/ICBME.2010.5705016","url":null,"abstract":"In this study, nanostructured composite coatings of hydroxyapatite (HA)/ 30wt% yttria stabilized zirconia (YSZ) coatings containing 0, 3, 5, and 8 mol% Y2O3 were successfully synthesized using the sol-gel method. The crystallite size of the coating was about ~44-58 nm for tetragonal and cubic zirconia grain size and 75-87 nm for hydroxyapatite grain size. Crack-free and homogeneous HA-YSZ composite coatings were obtained with no observable defects. The uniform distribution of zirconia particles in composite would be highly beneficial for obtaining homogeneous coatings of HA-YSZ film and would hinder grain growth of HA phase during calcinations. The decrease in electrochemical performance of these coated samples on comparison with the uncoated type 316L St.St could be associated with chloride ion and water penetration into the coating, transport of ions through the coating, and the subsequent electrochemical reactions at the coating-metal interface.","PeriodicalId":377764,"journal":{"name":"2010 17th Iranian Conference of Biomedical Engineering (ICBME)","volume":"122 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":"133448800","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
Skin lesion detection in dermoscopy images using wavelet transform and morphology operations 基于小波变换和形态学的皮肤镜图像损伤检测
2010 17th Iranian Conference of Biomedical Engineering (ICBME) Pub Date : 2010-11-01 DOI: 10.1109/ICBME.2010.5704944
Omid Sarrafzade, M. Baygi, P. Ghassemi
{"title":"Skin lesion detection in dermoscopy images using wavelet transform and morphology operations","authors":"Omid Sarrafzade, M. Baygi, P. Ghassemi","doi":"10.1109/ICBME.2010.5704944","DOIUrl":"https://doi.org/10.1109/ICBME.2010.5704944","url":null,"abstract":"Dermoscopy is one of the major imaging modalities used in the diagnosis of skin lesions such as melanoma and other pigmented lesions. Due to the difficulty and subjectivity of human interpretation, computerized analysis of dermoscopy images has become an important research area. One of the most important steps in dermoscopy image analysis is the automated detection of lesion borders. In this paper we propose a novel approach for border detection of lesions in dermoscopy images. First, the color input image is converted into a gray-level image. Then, the wavelet coefficients of gray-level image are calculated. The wavelet coefficients are modified using gradient of each wavelet band and a nonlinear function. The enhanced image is obtained from the inverse wavelet transform of modified coefficients. Morphology operators are used to segment the image, and finally the lesion is detected by an automated algorithm. The results show that the proposed method has a low percentage border error in a vast majority of skin lesions compared recent methods.","PeriodicalId":377764,"journal":{"name":"2010 17th Iranian Conference of Biomedical Engineering (ICBME)","volume":"29 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":"128422787","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
Mode propagation in a double layer structure microsphere 双层结构微球中的模式传播
2010 17th Iranian Conference of Biomedical Engineering (ICBME) Pub Date : 2010-11-01 DOI: 10.1109/ICBME.2010.5704979
K. Abbasian, R. Talebi, H. Daryanavrd
{"title":"Mode propagation in a double layer structure microsphere","authors":"K. Abbasian, R. Talebi, H. Daryanavrd","doi":"10.1109/ICBME.2010.5704979","DOIUrl":"https://doi.org/10.1109/ICBME.2010.5704979","url":null,"abstract":"In this paper propagation of light in microsphere and using it as a powerful sensor is described. A new multilayer structure sphere is proposed and its characteristic equation would be obtained. With this structure quality factor (Q) would be improved. Recent improvement in utilizing this powerful sensor with very high quality factor (Q) in biomedical and specially biophotonic is reported.","PeriodicalId":377764,"journal":{"name":"2010 17th Iranian Conference of Biomedical Engineering (ICBME)","volume":"218 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":"128948029","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
The new approach to automatic detection of Optic Disc from non-dilated retinal images 一种新的视盘自动检测方法
2010 17th Iranian Conference of Biomedical Engineering (ICBME) Pub Date : 2010-11-01 DOI: 10.1109/ICBME.2010.5704960
Z. Vahabi, M. Vafadoost, S. Gharibzadeh
{"title":"The new approach to automatic detection of Optic Disc from non-dilated retinal images","authors":"Z. Vahabi, M. Vafadoost, S. Gharibzadeh","doi":"10.1109/ICBME.2010.5704960","DOIUrl":"https://doi.org/10.1109/ICBME.2010.5704960","url":null,"abstract":"diabetic retinopathy is the commonest cause of blindness. Diabetes causes cataracts, Glaucoma and diabetic retinopathy. The Optic Disc is the exit point of retinal nerve fibers from the eye and the entrance and exit point for retinal blood vessels. The detection of Optic Disc is very essential to locate the various anatomical features in the retinal images. We describe a new filtering approach in the wavelet domain for image preprocessing. Sobel edge detection, Texture Analysis, Intensity and Template matching was used to detect Optic Disc. The proposed algorithm is tested on 150 images of Messidor dataset. Experimental results indicates that we are able to achieve 87.54% sensitivity, 99.76% specificity and 99.81% accuracy.","PeriodicalId":377764,"journal":{"name":"2010 17th Iranian Conference of Biomedical Engineering (ICBME)","volume":"2 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":"128983223","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: 15
Function simulation of a 4 degree-of-freedom robot for artery manipulation during vascular surgery 血管手术中动脉操作四自由度机器人的功能仿真
2010 17th Iranian Conference of Biomedical Engineering (ICBME) Pub Date : 2010-11-01 DOI: 10.1109/ICBME.2010.5704993
P. Pahlavan, S. Najarian, Ali Abouei, M. Moini
{"title":"Function simulation of a 4 degree-of-freedom robot for artery manipulation during vascular surgery","authors":"P. Pahlavan, S. Najarian, Ali Abouei, M. Moini","doi":"10.1109/ICBME.2010.5704993","DOIUrl":"https://doi.org/10.1109/ICBME.2010.5704993","url":null,"abstract":"Atheroma is one of the main causes of failure of arterial system. One of the most common approaches of treatment of this aneurysm is the bypass surgery. During this surgery, the surgeon has to free the artery from the surrounding tissue. To accomplish this, a hook, right- angle clamp, is used. However, there is always the possibility of damaging the veins and/or the neural paths around the artery while working with this mechanical hook. The reason for this is that the hook might not exactly circle the artery and its tip follows a different path from artery's outer surface. In this study, we considered a 4-degree-of-planar freedom robot, which is aimed to free the artery with making no damages to surrounding tissue, and analyzed its path following. Movements of the links of the robot were modeled under some boundary conditions, like definite space between the tip of the robot and the outer surface of the artery, and the path followed by the tip of the robot was extracted. Also, the different angles of the joints versus time were extracted and it was concluded that although under the considered boundary condition the goal is achieved, the movement could be improved.","PeriodicalId":377764,"journal":{"name":"2010 17th Iranian Conference of Biomedical Engineering (ICBME)","volume":"68 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":"131964295","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 new method for simulation of embolic signal in ultrasound blood flow signals 超声血流信号中栓塞信号模拟的新方法
2010 17th Iranian Conference of Biomedical Engineering (ICBME) Pub Date : 2010-11-01 DOI: 10.1109/ICBME.2010.5704978
M. Khodabakhshi, H. Behnam
{"title":"A new method for simulation of embolic signal in ultrasound blood flow signals","authors":"M. Khodabakhshi, H. Behnam","doi":"10.1109/ICBME.2010.5704978","DOIUrl":"https://doi.org/10.1109/ICBME.2010.5704978","url":null,"abstract":"A new method for simulation of Blood Flow signal containing embolus is introduced. This method relies on acoustic field calculations. Other researchers such as Jensen proposed an approach for flow data generation which shots of scatterers at different times were taken and did not take the Doppler effect into account. This method is based on Rayleigh integral and spatial impulse response. According to Rayleigh integral and using Ring function, we calculate the spatial impulse response of each scatterer. So by using that, the acoustic pressure can be simulated. When a scatterer travels across the vessels the spatial impulse response will be time variant. With assuming this fact we add the Doppler effect to signals. For simulating the embolic signal we add a high intensity transient signal. The result signal can be useful for testing embolic detection algorithms and for training purposes.","PeriodicalId":377764,"journal":{"name":"2010 17th Iranian Conference of Biomedical Engineering (ICBME)","volume":"32 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":"130821216","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: 3
Classification of breast lesions in dynamic contrast-enhanced MR images 动态增强磁共振图像中乳腺病变的分类
2010 17th Iranian Conference of Biomedical Engineering (ICBME) Pub Date : 2010-11-01 DOI: 10.1109/ICBME.2010.5704953
L. Bahreini, A. Jafari, M. Gity
{"title":"Classification of breast lesions in dynamic contrast-enhanced MR images","authors":"L. Bahreini, A. Jafari, M. Gity","doi":"10.1109/ICBME.2010.5704953","DOIUrl":"https://doi.org/10.1109/ICBME.2010.5704953","url":null,"abstract":"In recent years, the development of computer-aided diagnosis (CAD) for breast MR image (MRI) has been a big challenge. Usually multiple layer perceptron (MLP) was used for classification of breast MRI lesions. Fuzzy technique can integrate human expert's knowledge into the system and integrating it with artificial neural network (ANN) could provide us with more intelligent systems. Therefore, in this work, a three-layer feed-forward MLP classifier and a four-layer feed-forward fuzzy neural network (FNN) classifier were used separately to compare their diagnostic performance in discrimination between malignant and benign breast lesions. This work included 40 (23 malignant and 17 benign) histopathologically proven lesions and the steps of this work were as follows: region of interest (ROI) selection, fuzzy c-means (FCM) segmentation, some morphological feature extraction, MLP and FNN classifications, Receiver Operating Characteristic (ROC) analysis. The results showed FNN classifier has a better diagnostic performance than MLP classifier in discrimination between malignant and benign lesions, because FNN classifier has a greater accuracy and area under the receiver operating characteristic curve (AUC) than MLP classifier, and also at the similar sensitivity, FNN classifier has a greater specificity than MLP classifier. This indicates FNN could provide us with good performance in discrimination between malignant and benign breast lesions which can lead to more powerful breast MRI CADs.","PeriodicalId":377764,"journal":{"name":"2010 17th Iranian Conference of Biomedical Engineering (ICBME)","volume":"8 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":"127912198","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
An image processing approach to automatic detection of retina layers using texture analysis 基于纹理分析的视网膜层自动检测图像处理方法
2010 17th Iranian Conference of Biomedical Engineering (ICBME) Pub Date : 2010-11-01 DOI: 10.1109/ICBME.2010.5704951
Amineh Naseri, A. Pouyan, N. Kavian
{"title":"An image processing approach to automatic detection of retina layers using texture analysis","authors":"Amineh Naseri, A. Pouyan, N. Kavian","doi":"10.1109/ICBME.2010.5704951","DOIUrl":"https://doi.org/10.1109/ICBME.2010.5704951","url":null,"abstract":"In this paper, a computer approach is proposed for recognition of retina layers on optical coherence tomography (OCT) images. OCT uses the optical backscattering of light to scan the eye and describe a pixel representation of the anatomic layers within the retina. Our approach is based on co-occurrence matrix for feature extraction and a supervised learning method for classification, which four features of this matrix have been used as a feature vector by support vector machine (SVM) has been used for segmentation retina layers. Achieved result of combined these two methods in the best state was 98.6% precision. This result shows that apply these methods on OCT images discriminate retina layers with efficient accuracy. Since, recognition of retina layers is important for automatic analyzing of OCT images, therefore our proposed methods can be very useful.","PeriodicalId":377764,"journal":{"name":"2010 17th Iranian Conference of Biomedical Engineering (ICBME)","volume":"51 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":"129237575","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: 2
A comparison between new L1 minimization algorithms in Electrical Impedance Tomography using the Pareto Curve 利用帕累托曲线的电阻抗断层成像中新的L1最小化算法的比较
2010 17th Iranian Conference of Biomedical Engineering (ICBME) Pub Date : 2010-11-01 DOI: 10.1109/ICBME.2010.5704945
J. N. Tehrani, A. McEwan
{"title":"A comparison between new L1 minimization algorithms in Electrical Impedance Tomography using the Pareto Curve","authors":"J. N. Tehrani, A. McEwan","doi":"10.1109/ICBME.2010.5704945","DOIUrl":"https://doi.org/10.1109/ICBME.2010.5704945","url":null,"abstract":"Electrical Impedance Tomography (EIT) calculates the internal conductivity distribution within a body using electrical contact measurements. Conventional EIT reconstruction methods solve a linear model by minimizing the least squares error, i.e., the Euclidian or L2-norm, with regularization. Recently, total variation and L1 regularization have become more popular in medical image reconstruction. Here, we introduce new method for evaluating and finding the regularization parameters by using the L1-curve (Pareto Frontier curve). This method traces the optimal trade-off between the least-squares fit of residual and the L1-norm of the solution. In this paper, we compare this algorithm with two L1-norm regularization methods. The results show that this method can help us to have more control on filtering and sparsity of the solution. It also shows that visualizing the L1-curve (Pareto Curve) in order to understand the trade-offs between the norms of the residual and the solution can be helpful in situation where we do not have a very good estimation about the level of the noise.","PeriodicalId":377764,"journal":{"name":"2010 17th Iranian Conference of Biomedical Engineering (ICBME)","volume":"19 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":"126381540","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
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