Search Results - "Pereira, W.C.A."

Ultrasound method applied to characterize healthy femoral diaphysis of Wistar rats in vivo by Fontes-Pereira, A, Matusin, D P, Rosa, P, Schanaider, A, von Krüger, M A, Pereira, W C A

“…A simple experimental protocol applying a quantitative ultrasound (QUS) pulse-echo technique was used to measure the acoustic parameters of healthy femoral…”
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Intraobserver interpretation of breast ultrasonography following the BI-RADS classification by Calas, M.J.G, Almeida, R.M.V.R, Gutfilen, B, Pereira, W.C.A

“…Abstract Purpose To use the BI-RADS ultrasound classification in an intraobserver retrospective study of the interpretation of breast images. Materials and…”
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A Soft-Computing Methodology for Noninvasive Time-Spatial Temperature Estimation by Teixeira, CÉsar A., Ruano, Maria GraÇa, Ruano, AntÓnio E., Pereira, Wagner C. A.

“…The safe and effective application of thermal therapies is restricted due to lack of reliable noninvasive temperature estimators. In this paper, the temporal…”
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Discrete-event computer simulation methods in the optimisation of a physiotherapy clinic by Villamizar, J.R, Coelli, F.C, Pereira, W.C.A, Almeida, R.M.V.R

“…Abstract Objective To develop a computer model to analyse the performance of a standard physiotherapy clinic in the city of Rio de Janeiro, Brazil. Design and…”
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Singular spectrum analysis applied to backscattered ultrasound signals from in vitro human cancellous bone specimens by Pereira, W.C.A., Bridal, S.L., Coron, A., Laugier, P.

“…Mean scatterer spacing (MSS) holds particular promise for the detection of changes in quasiperiodic tissue microstructures such as may occur during development…”
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Evolutionary pulse-coupled neural network for segmenting breast lesions on ultrasonography by Gómez, W., Pereira, W.C.A., Infantosi, A.F.C.

“…Purpose: This paper presents an evolutionary segmentation approach for breast lesions on ultrasound (BUS) based on the pulse-coupled neural network (PCNN)…”
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Temperature changes in bone by therapeutic ultrasound: An experimental setup with phantoms and a bovine ex vivo sample by Novaes, D.B., Santos, C.B., Lucena, E.S., Butterworth, E., Pereira, W.C.A., Machado, C.B.

“…Heat distribution in multilayered tissues after therapeutic ultrasound (TUS) stimulation has been investigated in the last decades. However, there are still…”
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Feasibility of non-invasive temperature estimation by the assessment of the average gray-level content of B-mode images by Teixeira, C.A., Alvarenga, A.V., Cortela, G., von Krüger, M.A., Pereira, W.C.A.

“…•The average gray level (AVGL) enables the estimation of 2D temperature maps.•Development of coherent maps with the therapeutic transducer pressure field.•AVGL…”
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Construction of Mixed Covering Arrays Using a Combination of Simulated Annealing and Variable Neighborhood Search by Rodriguez-Cristerna, Arturo, Torres-Jimenez, Jose, Gómez, W., Pereira, W.C.A.

“…The construction of Mixed Covering Arrays (MCA) with the minimum number of rows has been a problem faced in different ways. This paper aims to construct near…”
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Computed Tomography Scanner Productivity and Entry-Level Models in the Global Market by Pereira, W. C. A., Almeida, Renan Moritz V. R., Pires, A. L. A., Santos, R. P.

“…Objective. This study evaluated the productivity of computed tomography (CT) models and characterized their simplest (entry-level) models’ supply in the world…”
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Bone quality analysis using X-ray microtomography and microfluorescence by Sales, E., Lima, I., de Assis, J.T., Gómez, W., Pereira, W.C.A., Lopes, R.T.

“…Bone quality is an evaluation index often applied in order to interpret clinical observations made upon bone health, such as bone mineral density, micro and…”
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On the possibility of non-invasive multilayer temperature estimation using soft-computing methods by Teixeira, C.A., Pereira, W.C.A., Ruano, A.E., Ruano, M. Graça

“…This work reports original results on the possibility of non-invasive temperature estimation (NITE) in a multilayered phantom by applying soft-computing…”
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In vitro chronic hepatic disease characterization with a multiparametric ultrasonic approach by Meziri, M., Pereira, W.C.A., Abdelwahab, A., Degott, C., Laugier, P.

“…Although, high resolution, real-time ultrasonic (US) imaging is routinely available, image interpretation is based on grey-level and texture and quantitative…”
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Morphological operators on the segmentation of breast ultrasound images by Gomez, W., Leija, L., Pereira, W.C.A., Infantosi, A.F.C.

“…This work presents a computerized lesion segmentation technique on breast ultrasound images. There were applied known techniques such as morphological…”
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Classifying Breast Tumours on Ultrasound Images Using a Hybrid Classifier and Texture Features by Alvarenga, A.V., Pereira, W.C.A., Infantosi, A.F.C., Azevedo, C.M.

“…This work aims to classify breast tumours on ultrasound (US) images, using texture features calculated from complexity curve (CC) and grey-level co-occurence…”
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NARX structures for non-invasive temperature estimation in non-homogeneous media by Teixeira, C.A., Pereira, W.C.A., Ruano, A.E., Ruano, M.G.

“…The safe and effective application of thermal therapies are limited by the existence of precise non-invasive temperature estimators. Such estimators would…”
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Classification of breast tumours on ultrasound images using morphometric parameters by Alvarenga, A.V., Pereira, W.C.A., Infantosi, A.F.C., de Azevedo, C.M.

“…This work aims to assess the potentiality of morphometric parameters in separating breast tumour, on ultrasonic images, as malign or benign. Parameters were…”
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Characterization of in vitro healthy and pathological human liver tissue periodicity applying singular spectrum analysis to backscattered ultrasound by Machado, C.B., Pereira, W.C.A., Meziri, M., Laugier, P.

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Mean scatterer spacing of backscattered ultrasound signals from in vitro human cancellous bone specimens by Pereira, W.C.A., Bridal, S.L., Coron, A., Laugier, P.

“…Acoustic parameters such as the slope of the frequency-dependent attenuation or the sound speed may be considered as surrogate markers for bone mineral density…”
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Ultrasonic characterization of stratified media with independent measurement of wave velocity and thickness by de Sousa, A.V.G., Machado, J.C., Pereira, W.C.A.

“…Ultrasonic pulse-echo systems are well established tools for non-destructive evaluation, optimal measurement design and geoacoustic inversion techniques…”
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