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

Simultaneous measurement of ciliary beat frequency and wave disorder on respiratory epithelial cells 纤毛搏动频率和呼吸上皮细胞波紊乱的同步测量

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.2003.1279424

W. Yi, K.S. Park, C.H. Lee, C. Rhee

引用次数: 3

Doublet stimulation to reduce fatigue in electrically stimulated muscle during controlled leg lifts 双重刺激，以减少疲劳的电刺激肌肉在控制抬腿

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.2003.1279643

G.R. Routh, W. Durfee

引用次数: 14

Nonlinear characteristics of visual evoked potential and their correlation with the visual responses on magnocellular and parvocellular pathways 视觉诱发电位的非线性特征及其与大细胞和旁细胞通路视觉反应的相关性

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.2003.1280383

Keiko Momose, S. Kasahara

{"title":"Nonlinear characteristics of visual evoked potential and their correlation with the visual responses on magnocellular and parvocellular pathways","authors":"Keiko Momose, S. Kasahara","doi":"10.1109/IEMBS.2003.1280383","DOIUrl":"https://doi.org/10.1109/IEMBS.2003.1280383","url":null,"abstract":"Purpose was to investigate the nonlinear characteristics of visual evoked potentials (VEPs), and their correlation with the visual responses on parvocellular and magnocellular pathways. The VEPs elicited by checkerboard pattern alternating based on pseudorandom binary sequence were measured, and their nonlinear parameters (binary kernels) were calculated. VEPs to checkerboard with 0.5, 1.0, 2.0 and 4.0 [c/d] were measured. First and second-order binary kernels were compared with steadystate VEPs (S-VEPs) to pattern reversal stimulation with a constant temporal frequency (4, 8, 12, 16, and 32 Hz). Positive peak latency at 150 ms of second-order first slice was correlated with S-VEP amplitude for 32 Hz (r = - 0.71). Amplitudes of second slice were well correlated with S-VEPs to 4, 8, 12, and 16 Hz stimuli (r = 0.62, 0.77, 0.61, and 0.72). These results support the previously reported observations that the first and second slice response functions reflect the response of the parvocellular and magnocellular pathways, respectively.","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":"42 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":"124718777","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

Segmenting cardiac MRI tagging lines using Gabor filter banks 使用Gabor滤波器组分割心脏MRI标记线

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.2003.1279834

Z. Qian, A. Montillo, Dimitris N. Metaxas, L. Axel

引用次数: 50

Frequency-based analysis of diastolic function 基于频率的舒张功能分析

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.2003.1279522

Y. Wu, A. Bowman, C. Chung, M. Karamanoglu, S. Kovacs

{"title":"Frequency-based analysis of diastolic function","authors":"Y. Wu, A. Bowman, C. Chung, M. Karamanoglu, S. Kovacs","doi":"10.1109/IEMBS.2003.1279522","DOIUrl":"https://doi.org/10.1109/IEMBS.2003.1279522","url":null,"abstract":"Quantitative determination of the filling (diastolic) function of the heart has been primarily correlative rather than causal and has been thwarted by the inability to define sensitive and specific non-invasive numerical indexes. In analogy to impedance, Z(/spl omega/)=V(/spl omega/)/I(/spl omega/) relating voltage V to current I in circuit theory, we introduce the concept of frequency-based analysis of diastolic function (DF) by analyzing the left ventricular (LV) filling pressure (P) to flow(Q) relation in terms of impedance as, Z(/spl omega/)=P(/spl omega/)/Q(/spl omega/). This allows abnormal DF to be viewed as a state of impedance mismatch between pressure and flow, relative to normal. Simultaneous pressure-flow data in 11 subjects was recorded during catheterization. Analysis of variance between groups (ANOVA) shows that the direct current (DC) component of impedance, Z/sub 0/ and the first harmonic coefficient, Z/sub 1/, differentiated between normal and abnormal DF groups (p<0.05). We conclude frequency-based analysis of DF differentiates between normal and abnormal DF states, elucidates the physiology of normal filling as a low-pass filter and has potential as a method for noninvasive DF quantitation.","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":"455 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":"131017504","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

Ferromagnetic ultrasound microbubbles contrast agent 铁磁超声微泡造影剂

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.2003.1279473

K. Soetanto, H. Watarai

{"title":"Ferromagnetic ultrasound microbubbles contrast agent","authors":"K. Soetanto, H. Watarai","doi":"10.1109/IEMBS.2003.1279473","DOIUrl":"https://doi.org/10.1109/IEMBS.2003.1279473","url":null,"abstract":"Microbubbles have attracted attention as ultrasonic contrast agents because their ultrasonic scattering property is excellent in comparison with other ultrasonic contrast agents. In the development of ultrasound contrast agent, the main difficulties accounted are the making of small microbubbles less than 10 /spl mu/m and the elongation of the lifetime of microbubbles. A new ultrasonic contrast agent, which is microbubbles typed coating by surfactant, has been developed. The contrast images produced by different-sized microbubbles contrast agents are studied quantitatively. Furthermore, a ferromagnetic ultrasound contrast agent was also studied for its potential as a Drug Delivery System (DDS). In this paper, a new ultrasonic contrast agent for the Drug Delivery System will be discussed. Ferromagnetic materials are placed on the surfaces of the surfactant microbubbles developed in our laboratory for the above purpose. Multivalent ions such as calcium ions are used to put the ferromagnetic materials on the surfaces of the microbubbles. It is confirmed that the developed magnetic microbubbles could be lead by a permanent magnet. The performance of the magnetic microbubbles is evaluated by measuring the time dependence of the attenuation constant as one of their acoustic properties.","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":"48 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":"130743540","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: 6

Transdermal drug delivery: a comparative analysis of skin impedance models and parameters 经皮给药:皮肤阻抗模型和参数的比较分析

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.2003.1280545

A. Coston, J.K.-J. Li

引用次数: 18

Interlimb differences in trajectory and positional control mechanisms 肢体间轨迹和位置控制机制的差异

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.2003.1279601

R. Sainburg, S. Schaefer, L. B. Bagesteiro

{"title":"Interlimb differences in trajectory and positional control mechanisms","authors":"R. Sainburg, S. Schaefer, L. B. Bagesteiro","doi":"10.1109/IEMBS.2003.1279601","DOIUrl":"https://doi.org/10.1109/IEMBS.2003.1279601","url":null,"abstract":"Previous findings suggest that movement trajectory and final position are specified and controlled differentially by the dominant and nondominant limb/hemisphere systems. In the current studies, we examine interlimb differences in trajectory planning and feedback mediated positional control mechanisms. The first study examines load compensation responses, whereas, the second study examines control of movements made to a range of distances. In the first study, the nondominant arm showed substantially better response to load compensation, whereas, the dominant arm over-compensated the effects of the load, producing a large and systematic overshoot of final position. In the second study, dominant arm movement amplitude was well predicted by peak acceleration, reflecting pre-planning of movement distance. However, nondominant arm peak accelerations did not predict movement distance well. Instead, the duration of acceleration varied systematically with peak velocity and movement amplitude. These findings suggest that the nondominant and dominant controllers specify and control movement distance through distinct mechanisms, the former utilizing a pulse-height strategy, and the latter using a pulse-width strategy. Taken together, these findings support the hypothesis that the dominant arm system is specialized for feedforward control of trajectory, and the nondominant system, for feedback mediated control of final limb posture.","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":"158 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":"124426439","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 simulation study of motor unit electrical and mechanical relations for the first dorsal interosseous muscle in man 人第一背骨间肌运动单元电力学关系的模拟研究

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.2003.1279632

P. Zhou, W. Rymer

引用次数: 2

A system for automatic adjustment of the inspired oxygen in mechanically ventilated premature infants 一种机械通气早产儿吸入氧自动调节系统

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.2003.1279713

N. Claure, O. Ozdamar, E. Bancalari

{"title":"A system for automatic adjustment of the inspired oxygen in mechanically ventilated premature infants","authors":"N. Claure, O. Ozdamar, E. Bancalari","doi":"10.1109/IEMBS.2003.1279713","DOIUrl":"https://doi.org/10.1109/IEMBS.2003.1279713","url":null,"abstract":"Episodes of hypoxemia are often observed in ventilated preterm infants. Assistance with a transient increase in the fraction of inspired oxygen (FiO/sub 2/) is difficult and time consuming for the intensive care personnel. In order to reduce the morbidities associated with hypoxemia and oxygen toxicity, a system for closed loop control of FiO/sub 2/ (cFiO/sub 2/) was developed to respond to frequent and severe hypoxemic episodes and minimize oxygen exposure. The cFiO/sub 2/ system is based on a hybrid algorithm of rule based and differential feedback control. It automatically adjusts FiO/sub 2/ depending on the occurrence of the severity, duration, rate of change of the ensuing/resolving hypoxemia, and on the basal FiO/sub 2/ required to maintain oxygenation. In a clinical study, cFiO/sub 2/ was compared to a dedicated trained nurse managing the FiO/sub 2/ in a group of ventilated preterm infants and it was effective in limiting the duration and seventy of hypoxemia. Close loop FiO/sub 2/ control could improve the respiratory, ophthalmic and neurological outcome and facilitate the care of premature neonates.","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":"34 1 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":"116378610","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