Proceedings of the 25th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (IEEE Cat. No.03CH37439)最新文献_第2页

Light scattering "fingerprints" of initial pre-dysplastic events in colon carcinogenesis 结肠癌发生初期发育不良事件的光散射“指纹”

Proceedings of the 25th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (IEEE Cat. No.03CH37439) Pub Date : 2003-12-01 DOI: 10.1109/IEMBS.2003.1279432

Y. Kim, Y. Liu, R. Wali, H. Roy, M. Goldberg, A. Kromine, K. Chen, V. Backman

引用次数: 0

Classification of imaginary tasks from three channels of EEG by using an artificial neural network 利用人工神经网络对脑电三通道虚拟任务进行分类

Proceedings of the 25th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (IEEE Cat. No.03CH37439) Pub Date : 2003-12-01 DOI: 10.1109/IEMBS.2003.1280372

Jie Deng, Bin He

引用次数: 7

Detection of spiculated lesions in mammograms 乳腺x线摄影中棘状病变的检测

Proceedings of the 25th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (IEEE Cat. No.03CH37439) Pub Date : 2003-12-01 DOI: 10.1109/IEMBS.2003.1279888

M. Sampat, A. Bovik

引用次数: 48

RBC flow imaging and pO/sub 2/ measurement in cerebral microcirculation:effect of hemodilution on oxygen supply to brain cortical arterioles 脑微循环红细胞血流成像及pO/ sub2 /测定:血液稀释对脑皮质小动脉供氧的影响

Proceedings of the 25th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (IEEE Cat. No.03CH37439) Pub Date : 2003-12-01 DOI: 10.1109/IEMBS.2003.1279426

T. Arai, K. Tsukada, E. Sekizuka, C. Oshio, S. Terao, K. Hase, H. Minamitani

{"title":"RBC flow imaging and pO/sub 2/ measurement in cerebral microcirculation:effect of hemodilution on oxygen supply to brain cortical arterioles","authors":"T. Arai, K. Tsukada, E. Sekizuka, C. Oshio, S. Terao, K. Hase, H. Minamitani","doi":"10.1109/IEMBS.2003.1279426","DOIUrl":"https://doi.org/10.1109/IEMBS.2003.1279426","url":null,"abstract":"Hemodilution is still one of the taken therapy in stroke due to increase in cardiac output and decrease in blood viscosity. However, it is not clear the effect of a decrease in oxygen carrying capacity on oxygen supplying to the brain. The aim of this study is to seek the effect of isovolemic hemodilution on oxygen supply. We observed RBC flow rate and oxygen tension pO/sub 2/ on brain cortical arterioles by using closed cranial window, high-speed videomicroscopy and oxygen dependent quenching of phosphorescence technique. The result showed that RBC flow rate increased about four times from base line and pO2 values were kept within a arteliolar biological state (about a range from 70 to 90mmHg) until Hb was about l0g/dl, respectively. And more severe hemodilution made the both values decrease acutely. The results suggest the increase of RBC flow caused by isovolemic hemodilution keeps supplying oxygen to the brain cortex as low as Hb is l0g/dl.","PeriodicalId":258551,"journal":{"name":"Proceedings of the 25th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (IEEE Cat. No.03CH37439)","volume":"204 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132537819","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

Segmentation and analysis of 3D cardiac motion from tagged MRI images 从标记MRI图像中分割和分析三维心脏运动

Proceedings of the 25th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (IEEE Cat. No.03CH37439) Pub Date : 2003-12-01 DOI: 10.1109/IEMBS.2003.1279527

Dimitris N. Metaxas, L. Axel, Z. Hu, A. Montillo, Kyoungju Park, Z. Qian

{"title":"Segmentation and analysis of 3D cardiac motion from tagged MRI images","authors":"Dimitris N. Metaxas, L. Axel, Z. Hu, A. Montillo, Kyoungju Park, Z. Qian","doi":"10.1109/IEMBS.2003.1279527","DOIUrl":"https://doi.org/10.1109/IEMBS.2003.1279527","url":null,"abstract":"This paper gives an overview of our framework for the automated segmentation and motion analysis of cardiac motion from MRI tagging lines. It consists of a series of novel methods which utilize theory from image processing, deformable models and finite elements. Our framework consists of several steps. In the first step we use Gabor filter banks and deformable models for the automatic segmentation of tagging lines and cardiac boundaries. The extracted tagging lines and boundaries are then used as input to a volumetric deformable model for the heart's motion estimation analysis. In this step we first extract parameters that can determine the difference between a normal and a pathologic heart motion. Second, using an expectation-maximization methodology (EM) we are able to determine a given heart's stress-strain relationship and fiber orientation. Our hypothesis is that the 3D shape and motion analysis of the heart will allow the faster and timely diagnosis of heart disease compared to traditional 2D methods. We present a series of segmentation, shape, motion and tissue property analysis results.","PeriodicalId":258551,"journal":{"name":"Proceedings of the 25th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (IEEE Cat. No.03CH37439)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128840284","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: 5

Periarticular reflexes contribute to joint stiffness during valgus loading at the knee 膝关节外翻负荷时，关节周围反射导致关节僵硬

Proceedings of the 25th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (IEEE Cat. No.03CH37439) Pub Date : 2003-12-01 DOI: 10.1109/IEMBS.2003.1279607

Y. Dhaher, A. Tsoumanis, W. Rymer

引用次数: 0

Otto Schmitt: a father of biomedical engineering and master Gadgeteer 奥托·施密特:生物医学工程之父，科技大师

Proceedings of the 25th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (IEEE Cat. No.03CH37439) Pub Date : 2003-12-01 DOI: 10.1109/IEMBS.2003.1280892

R. Patterson

引用次数: 0

Speckle noise reduction and segmentation on polarization sensitive optical coherence tomography images 偏振敏感光学相干层析成像的散斑降噪与分割

Proceedings of the 25th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (IEEE Cat. No.03CH37439) Pub Date : 2003-12-01 DOI: 10.1109/IEMBS.2003.1279428

H. Choi, T. Milner, A. Bovik

引用次数: 11

Thermal dose versus isotherm as lesion boundary estimator for cardiac and hepatic radio-frequency ablation 热剂量与等温线作为心脏和肝脏射频消融的病灶边界估计

Proceedings of the 25th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (IEEE Cat. No.03CH37439) Pub Date : 2003-12-01 DOI: 10.1109/IEMBS.2003.1279532

D. Haemmerich, J. G. Webster, D. M. Mahvi

{"title":"Thermal dose versus isotherm as lesion boundary estimator for cardiac and hepatic radio-frequency ablation","authors":"D. Haemmerich, J. G. Webster, D. M. Mahvi","doi":"10.1109/IEMBS.2003.1279532","DOIUrl":"https://doi.org/10.1109/IEMBS.2003.1279532","url":null,"abstract":"Radio-frequency (RF) ablation is a therapy that destroys pathologic tissue by heat. Cardiac ablation is a widely used treatment method for a number of cardiac arrhythmias. Hepatic ablation is becoming an increasingly popular for treatment of liver tumors. Mathematical ablation models have been developed to predict dimensions of inflicted tissue damage (i.e. RF lesion). In most models the 50 /spl deg/C isotherm has been used to determine boundary between viable and dead tissue. It is well known that accurate damage prediction has to take the temperature history (i.e. thermal dose) into account. We implemented the widely used Arrhenius damage model into our finite element method computer models of cardiac and hepatic RF ablation. We simulated cardiac ablation for 45 s, and hepatic ablation for 12 min. We compared the lesion boundary determined by the damage model to the 50 /spl deg/C isotherm. For the cardiac model, the isotherm overestimated the lesion diameter by 4.8%. For hepatic ablation model, the isotherm underestimated the lesion diameter by 4 %. For short treatment times below 30 s in cardiac ablation, and for long treatment times in hepatic ablation above 20 min, the thermal dose should be used to determine lesion dimensions since the isotherm results in large errors in these cases.","PeriodicalId":258551,"journal":{"name":"Proceedings of the 25th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (IEEE Cat. No.03CH37439)","volume":"125 2","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113972773","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: 33

Evaluation of different cortical potential imaging methods using simulated EEG data 利用模拟脑电图数据评价不同皮质电位成像方法

Proceedings of the 25th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (IEEE Cat. No.03CH37439) Pub Date : 2003-12-01 DOI: 10.1109/IEMBS.2003.1280159

Jun Yao, J. Dewald

{"title":"Evaluation of different cortical potential imaging methods using simulated EEG data","authors":"Jun Yao, J. Dewald","doi":"10.1109/IEMBS.2003.1280159","DOIUrl":"https://doi.org/10.1109/IEMBS.2003.1280159","url":null,"abstract":"Different cortical potential imaging methods have been developed to directly link the scalp potentials with the cortical potentials. These methods make it possible to non-invasively investigate cortical activities with high spatial and time resolutions by using scalp EEG. However, although there are many different cortical potential imaging methods available, up to now, the accuracy and efficiency of these methods have not been rigorously evaluated nor compared. In this paper, we investigated a total of five different methods using ten different scenarios that employ simulated scalp EEG data with or without noise. Our results showed that 1), when only the center of electrical cortical activity needs to be estimated, single moving dipole and single dipole deviation scan methods are more accurate and more efficient than current density methods; and 2), with respect to current density methods, which are useful when the number of sources are unknown, the LORETA method with the L1-norm gives the highest accuracy, however, at a significant computational cost.","PeriodicalId":258551,"journal":{"name":"Proceedings of the 25th Annual International Conference of the IEEE Engineering in Medicine and Biology Society (IEEE Cat. No.03CH37439)","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2003-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116848564","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