Buscar
Mostrando ítems 1-10 de 113
Improving synthetic aperture image by image compounding in beamforming process
(2011-11-10)
In this work, signal processing techniques are used to improve the quality of image based on multi-element synthetic aperture techniques. Using several apodization functions to obtain different side lobes distribution, a ...
Improving ultrasonic imaging of aluminum plates using phase modulation
(2020-01-01)
Conventional techniques for ultrasonic image beamforming use amplitude information to produce the im-ages. Although amplitude images can be obtained with high quality, they can also present limitations regarding dead zone, ...
Ultrasonic Image Compounding Method Based on the Instantaneous Phase Image
(Ieee, 2016-01-01)
The quality of ultrasonic images depends on array configuration, image beamforming algorithm, propagation modes and signal-to-noise ratio. Some alternatives to improve image quality are related to the use of coherence ...
Geração de imagens por ultrassom utilizando as técnicas sparse arrays e plane wave
(Universidade Tecnológica Federal do ParanáCuritibaBrasilPrograma de Pós-Graduação em Engenharia Elétrica e Informática IndustrialUTFPR, 2018-12-13)
Nowadays, the major difficulties to improve the quality of the images using the ultrasonic techniques are related to the high number of shots used for transducer excitation, large quantities of storage data and the necessary ...
Ultrasonic image compounding method based on the instantaneous phase image
(2017-03-08)
The quality of ultrasonic images depends on array configuration, image beamforming algorithm, propagation modes and signal-to-noise ratio. Some alternatives to improve image quality are related to the use of coherence ...
Análise comparativa de técnicas de compressão aplicadas a imagens médicas usando ultrassom
(Universidade Tecnológica Federal do ParanáCuritibaPrograma de Pós-Graduação em Engenharia Elétrica e Informática Industrial, 2014-03-18)
The area of image compression is of great importance for medical applications. Compression techniques have been studied for allowing to efficiently representing the data, reducing the required storage space and minimizing ...
Refraction corrected transmission ultrasound computed tomography for application in breast imaging
(AMER ASSOC PHYSICISTS MEDICINE AMER INST PHYSICS, 2010)
Purpose: We present an iterative framework for CT reconstruction from transmission ultrasound data which accurately and efficiently models the strong refraction effects that occur in our target application: Imaging the ...
Improving synthetic aperture image by image compounding in beamforming process
(2011-11-10)
In this work, signal processing techniques are used to improve the quality of image based on multi-element synthetic aperture techniques. Using several apodization functions to obtain different side lobes distribution, a ...
Despeckle filtering for multiscale amplitude-modulation frequency-modulation (AM-FM) texture analysis of ultrasound images of the intima-media complex
(Hindawi Publishing Corporation, 2014-03-09)
The intima-media thickness (IMT) of the common carotid artery (CCA) is widely used as an early indicator of cardiovascular disease (CVD). Typically, the IMT grows with age and this is used as a sign of increased risk of ...