2007 IEEE International Workshop on Imaging Systems and Techniques最新文献_第2页

Electromagnetic Imaging for Non-Intrusive Evaluation in Civil Engineering 电磁成像在土木工程中的非侵入性评价

2007 IEEE International Workshop on Imaging Systems and Techniques Pub Date : 2007-05-05 DOI: 10.1109/IST.2007.379581

G. Bozza, C. Estatico, M. Pastorino, A. Randazzo

{"title":"Electromagnetic Imaging for Non-Intrusive Evaluation in Civil Engineering","authors":"G. Bozza, C. Estatico, M. Pastorino, A. Randazzo","doi":"10.1109/IST.2007.379581","DOIUrl":"https://doi.org/10.1109/IST.2007.379581","url":null,"abstract":"In this paper an imaging approach for non-intrusive evaluation of civil structures is discussed. The approach is based on the inversion of scattering data measured in near field. Cylindrical geometries are considered under transverse magnetic (TM) illumination conditions. The integral relationships of the inverse scattering problem are discretized and solved by an Inexact-Newton method, which has been found to be very effective in solving ill-posed inverse problems. The approach takes into account the nonlinear nature of the electromagnetic inverse scattering problem, since no approximations are applied (except the ones related to the discretization of the continuous model). After the inversion of the measured data, the imaging method provides images of the dielectric properties of the cross section of the civil structures under test. The mathematical formulation of the method is briefly discussed and the results of numerical simulations are reported. Simplified geometrical configurations are considered, but with dielectric properties close to those of real materials employed in the field of civil engineering.","PeriodicalId":329519,"journal":{"name":"2007 IEEE International Workshop on Imaging Systems and Techniques","volume":"50 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114581847","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

Tomographic Imaging based on Capacitance Measurement and Industrial Applications 基于电容测量的层析成像及其工业应用

2007 IEEE International Workshop on Imaging Systems and Techniques Pub Date : 2007-05-05 DOI: 10.1109/IST.2007.379587

Wuqiang Yang

引用次数: 29

Low-Power Image Compression for Wireless Capsule Endoscopy 无线胶囊内窥镜低功耗图像压缩

2007 IEEE International Workshop on Imaging Systems and Techniques Pub Date : 2007-05-05 DOI: 10.1109/IST.2007.379586

P. Turcza, M. Duplaga

引用次数: 55

A Robust Hierarchical Neural Network Methodology for Improved Image Classification Performance 改进图像分类性能的鲁棒层次神经网络方法

2007 IEEE International Workshop on Imaging Systems and Techniques Pub Date : 2007-05-05 DOI: 10.1109/IST.2007.379611

Dimitrios Alexios Karras, Basil G. Mertzios, C. Alexopoulos, D. Mitzias

引用次数: 0

Graph-based Linguistic Formalisms in Spatial Modelling of 3D Coronary Vessels 三维冠状血管空间建模中基于图的语言形式

2007 IEEE International Workshop on Imaging Systems and Techniques Pub Date : 2007-05-05 DOI: 10.1109/IST.2007.379567

M. Ogiela, R. Tadeusiewicz, M. Trzupek

{"title":"Graph-based Linguistic Formalisms in Spatial Modelling of 3D Coronary Vessels","authors":"M. Ogiela, R. Tadeusiewicz, M. Trzupek","doi":"10.1109/IST.2007.379567","DOIUrl":"https://doi.org/10.1109/IST.2007.379567","url":null,"abstract":"In the paper the new possibilities for making semantic interpretations of medical structure visualizations with the use of AI linguistic formalisms and especially graph grammar of edNLC type have been presented. Discussed in detail are methods of computational intelligence to the development of a syntactic semantic description of spatial visualizations of the heart's coronary vessels. The methodology can be used for both smart ordering of images while archiving them and for their semantic searches. The latter is especially significant in the context of searching multimedia medical databases (also those accessible online) for such spatial visualizations of those coronary arteries that meet specific medical conditions formulated in a query or presented through a sample image included as an element of the query. The IT methodology described in this work makes it possible to find, for each biological 3D structure considered, its semantic description whose elements make reference to the medical significance of the entire structure described, while at the same time refrain from the formal differences (i.e. appearance and shape) of individual visualizations.","PeriodicalId":329519,"journal":{"name":"2007 IEEE International Workshop on Imaging Systems and Techniques","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134116626","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 Collaborative System for Pigmented Skin Lesions Malignancy Tracking 色素皮损恶性追踪的协同系统

2007 IEEE International Workshop on Imaging Systems and Techniques Pub Date : 2007-05-05 DOI: 10.1109/IST.2007.379576

W. Barhoumi, S. Dhahbi, E. Zagrouba

{"title":"A Collaborative System for Pigmented Skin Lesions Malignancy Tracking","authors":"W. Barhoumi, S. Dhahbi, E. Zagrouba","doi":"10.1109/IST.2007.379576","DOIUrl":"https://doi.org/10.1109/IST.2007.379576","url":null,"abstract":"This paper presents a new collaborative computer-aided diagnosis system for skin lesions malignancy tracking composed of two modules for lesion description and decision. The decision module incorporates classification and content-based image retrieval schemes (CBIR). The final decision of lesion malignancy will be obtained by merging the two decisions while using the Dempster-Shafer theory in order to improve the accuracy of the final produced decisions. Indeed, after the preprocessing of the studied image and the extraction of the skin lesions by the segmentation process, the lesion description stage defines a set of descriptive features reflecting the clinical signs of the considered lesions malignancy. In fact, 21 features representing shape and radiometric properties are calculated. The quality of these features is evaluated by applying principal components analysis (PCA) and ROC assessment criteria. The results show that the feature set can be reduced to dimension 16. Then, the proposed system estimates the preliminary lesions class with the classification scheme, while using a perceptron neural network technique preceded by a training step. Moreover, given a database of skin lesions, CBIR of the images belonging to this database which gather with the studied image and whose lesions malignancy states are known, permits to have another preliminary idea on the type of the eventual skin lesion. Finally, the results of classification and retrieval schemes are combined while using the Dempster-Shafer theory. This consists to consider the results produced separately by each technique as being dubious sources of information on the lesions malignity with an aim of combining their respective opinions. The proposed architecture allows the production of a viable cost-effective set of opinions on skin lesions malignancy. Besides, since the decision can never be perfect, the CBIR subsystem displays also visually similar images with known pathologies, to provide an intuitive aid to the dermatologist to improve the diagnosis accuracy.","PeriodicalId":329519,"journal":{"name":"2007 IEEE International Workshop on Imaging Systems and Techniques","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129752224","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: 10

On the Robustness of Multi-Pulse Techniques Against Undesired Effects in Contrast Enhanced Ultrasound Imaging 对比增强超声成像中多脉冲技术的鲁棒性研究

2007 IEEE International Workshop on Imaging Systems and Techniques Pub Date : 2007-05-05 DOI: 10.1109/IST.2007.379571

M. Crocco, C. Sciallero, A. Trucco

{"title":"On the Robustness of Multi-Pulse Techniques Against Undesired Effects in Contrast Enhanced Ultrasound Imaging","authors":"M. Crocco, C. Sciallero, A. Trucco","doi":"10.1109/IST.2007.379571","DOIUrl":"https://doi.org/10.1109/IST.2007.379571","url":null,"abstract":"One of the most important issues in the field of contrast agents-based echographic imaging is the development of techniques able to separate the echoes of such contrast media from the echoes of the biological tissue: in particular in literature could be found various solutions concerning the use of multiple transmitted signals and the combination of related echoes. These techniques may undergo a reduction of performance, due to some undesired effects normally not taken into account, such as non-linearities introduced by hardware equipment and tissue propagation, thermal and electronic noise and body motion between successive pulses. Here we introduce a simulation tool that we developed, able to calculate the backscattered echo from a contrast agents population immersed in biological tissue, considering all the previous effects. By means of this tool, we performed a comparative analysis of the various multi-pulse techniques on the basis of the contrast to tissue ratio (CTR) and the signal to noise ratio (SNR) before and after the echoes summation. The results show the potentially strong impact of the undesired effects on these techniques and may provide useful hints on the choice of the particular technique to be applied, regarding the specific diagnostic application addressed and the hardware characteristics.","PeriodicalId":329519,"journal":{"name":"2007 IEEE International Workshop on Imaging Systems and Techniques","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2007-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115100364","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

Measurement of Wheelchair Position for Analyzing Transfer Motion for SCI Patient 轮椅位置测量分析脊髓损伤患者转移运动

2007 IEEE International Workshop on Imaging Systems and Techniques Pub Date : 2007-05-05 DOI: 10.1109/IST.2007.379605

Y. Tanimoto, K. Nanba, H. Ukida, H. Yamamoto

引用次数: 2

Enhanced Detection and Imaging based on Novel Molecular NanoPhotonics Principles 基于新型分子纳米光子学原理的增强检测和成像

2007 IEEE International Workshop on Imaging Systems and Techniques Pub Date : 2007-05-05 DOI: 10.1109/IST.2007.379579

G. Giakos, K. Valluru, S. Paturi, V. Adya, K. Ambadipudi, P. Bathini, M. Reddy, S. Sukumar

引用次数: 7

Inverse Patterns - A Ray Tracing Approach 逆向模式-光线追踪方法

2007 IEEE International Workshop on Imaging Systems and Techniques Pub Date : 2007-05-05 DOI: 10.1109/IST.2007.379595

V. Putz, B. R. Arminger, B. Zagar

引用次数: 0