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检索条件"机构=Biomedical Engineering Program/COPPE"
183 条 记 录,以下是81-90 订阅
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Improved range resolution and side lobe level of ultrasound echoes using nonlinear frequency-modulated excitation signal and modified compressing filter
Improved range resolution and side lobe level of ultrasound ...
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IEEE Symposium (IUS) Ultrasonics
作者: Tarcisio M. Dantas Rodrigo P. B. Costa-Felix João C. Machado Telecommunication Engineering Department of Federal Fluminense University Niteroi Rio de Janeiro Brazil Laboratory of Ultrasound Division of Acoustic and Vibration Metrology Directory of Scientific and Industrial Metrology INMETRO Duque de Caxias Rio de Janeiro Brazil Biomedical Engineering Program COPPE Federal University of Rio de Janeiro Rio de Janeiro Brazil
Linear frequency modulated (LFM) pulses are used as excitation for ultrasonic imaging systems. Temporal sidelobes, due to echo compression, are generated and impart a degradation of the range resolution. This work pro... 详细信息
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Automatic microcalcifications segmentation procedure based on Otsu's method and morphological filters
Automatic microcalcifications segmentation procedure based o...
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Pan American Health Care Exchanges, PAHCE
作者: M. A. Duarte A. V. Alvarenga C. M. Azevedo A. F. C. Infantosi W. C. A. Pereira Electronic Engineering Department Gama Fiho University Rio de Janeiro Brazil Laboratory of Ultrasound National Institute of Metrology Standardization and Industrial Quality (Inmetro) Brazil Gaffrée & Guinle University Hospital University of Rio de Janeiro Rio de Janeiro Brazil Biomedical Engineering Program/COPPE Federal University of Rio de Janeiro Rio de Janeiro Brazil
Microcalcifications are present in a great number of malignant lesions, being considered as a significant sign of malignancy. However, they are detected in less than 50% of mammograms with carcinomas. Given this scena... 详细信息
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Event-related synchronization/desynchronization for evaluating cortical response detection induced by dynamic visual stimuli
Event-related synchronization/desynchronization for evaluati...
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12th Mediterranean Conference on Medical and Biological engineering and Computing, MEDICON 2010
作者: Da-Silva, P.J.G. Infantosi, A.F.C. Nadal, J. Biomedical Engineering Program COPPE Federal University of Rio de Janeiro P. O. Box 68.510 21941-972 - Rio de Janeiro - RJ Brazil
In the present work, the Event-Related Synchronization and Desynchronization (ERD/ERS) index was used for evaluating the cortical response to dynamic visual stimulation in an postural control protocol. EEG signals (O1... 详细信息
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A numerical model of the respiratory modulation of pulmonary shunt and PaO2 oscillations for acute lung injury
A numerical model of the respiratory modulation of pulmonary...
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作者: Beda, Alessandro Jandre, Frederico C. Giannella-Neto, Antonio Pulmonary Engineering Lab Biomedical Engineering Program COPPE - Federal University of Rio de Janeiro Rio de Janeiro Brazil Pulmonary Engineering Group University Clinic Carl Gustav Carus Technical University Dresden Dresden Germany
It is an accepted hypothesis that the amplitude of the respiratory-related oscillations of arterial partial pressure of oxygen (ΔPaO2) is primarily modulated by fluctuations of pulmonary shunt (Δs), the latter gener... 详细信息
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Simples coherence vs. multiple coherence: A somatosensory evoked response detection investigation
Simples coherence vs. multiple coherence: A somatosensory ev...
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12th Mediterranean Conference on Medical and Biological engineering and Computing, MEDICON 2010
作者: Melges, D.B. De Sá, A. M. F. L. Miranda Infantosi, A.F.C. Biomedical Engineering Program COPPE Federal University of Rio de Janeiro Av. Horácio Macedo 2030 Sala 327 CEP 21941-914 Rio de Janeiro Brazil
In this work the performance of two techniques useful for detecting the somatosensory evoked potential (SEP), namely the Magnitude-Squared Coherence (MSC or Simple Coherence) and its multivariate version, the Multiple... 详细信息
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Active contours without edges applied to breast lesions on ultrasound
Active contours without edges applied to breast lesions on u...
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作者: Gómez, W. Infantosi, A.F.C. Leija, L. Pereira, W.C.A. Department of Electrical Engineering CINVESTAV-IPN Mexico D.F. Mexico Biomedical Engineering Program COPPE/UFRJ Cidade Universitária Horácio Macedo Ave. 2030 Rio de Janeiro Brazil
A computerized lesion segmentation technique for breast ultrasound images is proposed. It uses a deformable model based on active contours without edges. The performance of this technique was accessed by comparing the... 详细信息
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Principal components clustering through a variance-defined metric
Principal components clustering through a variance-defined m...
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12th Mediterranean Conference on Medical and Biological engineering and Computing, MEDICON 2010
作者: Costa, J.C.G.D. Melges, D.B. Almeida, R.M.V.R. Infantosi, A.F.C. Biomedical Engineering Program COPPE-Federal University of Rio de Janeiro Av. Horacio Macedo 2030 Bl. H Rio de Janeiro Zip code 21941-972 Brazil
This work aims at proposing a clustering procedure through a new metric, a weighted Euclidean distance, in which the weights are the ratio of corresponding eigenvalues and the largest eigenvalue found after a Principa... 详细信息
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Investigating the EEG alpha band during kinesthetic and visual motor imagery of the spike volleyball movement
Investigating the EEG alpha band during kinesthetic and visu...
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12th Mediterranean Conference on Medical and Biological engineering and Computing, MEDICON 2010
作者: Stecklow, M.V. Cagy, M. Infantosi, A.F.C. Biomedical Engineering Program Federal University of Rio de Janeiro COPPE Av. Brigadeiro Trompowsky Rio de Janeiro Brazil Fluminense Federal University Department of Epidemiology and Biostatistics Niterói Brazil
Motor Imagery (MI) is the mental simulation of motor tasks and its execution may recover a motor planning in the central nervous system. The purpose of this study was to analyze the changes along trials of Motor Image... 详细信息
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Breast ultrasound imaging phantom to mimic malign lesion characteristics
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Physics Procedia 2010年 第1期3卷 421-426页
作者: I.M. de Carvalho R.L.Q. Basto A.F.C. Infantosi M.A. von Krüger W.C.A. Pereira Biomedical Engineering Program COPPE/UFRJ Av. Horacio Macedo 2030 Rio de Janeiro 21941-914 Brazil
Ultrasound (US) phantoms are used to simulate the main acoustic properties of human soft tissues and are usually applied in guided biopsy training and equipment calibration. In this work it is presented an ultrasound ... 详细信息
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A fractional electrical impedance model in detection of occlusal non-cavitated carious
A fractional electrical impedance model in detection of occl...
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Annual International Conference of the IEEE engineering in Medicine and Biology Society (EMBC)
作者: Andréa P. Morais Alexandre V. Pino Mãrcio N. Souza Biomedical Engineering Program COPPE Centro de Tecnologia Federal University of Rio de Janeiro Rio de Janeiro Brazil
Identification of occlusal caries remains a major concern for the diagnosis, which is still highly subjective and presents a considerable variability among clinicians. Dentists have been observed an increase of a spec... 详细信息
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