Mr. Ricardo G. Dantas Profile

Ricardo G. Dantas

at Estadual Univ de Campinas

SPIE Involvement:

Author

Publications (6)

Proceedings Article | 23 May 2003 Paper

Phase diversity for speckle reduction

Ricardo Dantas, Sidney Leeman, Eduardo Costa, Joie Jones, Eduardo Valadares Oliveira

Proceedings Volume 5035, (2003) https://doi.org/10.1117/12.479904

KEYWORDS: Speckle, Spiral phase plates, Ultrasonography, Image filtering, Image resolution, Signal to noise ratio, Image processing, Bandpass filters, Filtering (signal processing), Optical inspection

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Proceedings Article | 30 May 2001 Paper

Measurement of transducer directivity function

Sidney Leeman, Andrew Healey, Eduardo Costa, Hayram Nicacio, Ricardo Dantas, Joaquim Maia

Proceedings Volume 4325, (2001) https://doi.org/10.1117/12.428234

KEYWORDS: Transducers, Fourier transforms, Ultrasonography, Distance measurement, Spherical lenses, 3D metrology, Time metrology, Head, Medicine, Calibration

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Proceedings Article | 20 April 2000 Paper

Ultrasonic Doppler blood flow meter for extracorporeal circulation

Ricardo Dantas, Eduardo Costa, Joaquim Maia, Vera Nantes Button

Proceedings Volume 3978, (2000) https://doi.org/10.1117/12.383426

KEYWORDS: Ultrasonics, Blood, Doppler effect, Transducers, Blood circulation, Sensors, Receivers, Signal processing, Heart, Fourier transforms

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Proceedings Article | 12 April 2000 Paper

Diffractive limited acoustic field of an apodized ultrasound transducer

Vera Nantes Button, Eduardo Costa, Joaquim Maia, Ricardo Dantas

Proceedings Volume 3982, (2000) https://doi.org/10.1117/12.382252

KEYWORDS: Transducers, Ceramics, Acoustics, Ultrasonography, Electrodes, Apodization, Diffraction, Spherical lenses, Polarization, Finite element methods

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Proceedings Article | 12 April 2000 Paper

Evaluation of osteoporosis using ultrasound

Joaquim Maia, Eduardo Costa, Vera Nantes Button, Ricardo Dantas

Proceedings Volume 3982, (2000) https://doi.org/10.1117/12.382253

KEYWORDS: Ultrasonography, Transducers, Signal attenuation, Bone, Ultrasonics, Wave propagation, Transmitters, Dual energy x-ray absorptiometry, Minerals, Control systems

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Proceedings Article | 12 April 2000 Paper

Pulsed ultrasound field simulation and visualization

Sidney Leeman, Andrew Healey, Ricardo Dantas, Eduardo Costa

Proceedings Volume 3982, (2000) https://doi.org/10.1117/12.382218

KEYWORDS: Transducers, Ultrasonography, Visualization, Wave propagation, Computer simulations, Silicon, Medical imaging, Computed tomography, Information operations, Solids

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Showing 5 of 6 publications

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