Results 251 to 260 of about 21,223,740 (304)
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LOW-COST DEVICE FOR C-SCAN PHOTOACOUSTIC IMAGING
The Journal of the Acoustical Society of America, 2013The prostate gland or other region of interest is stimulated with laser light, resulting in ultrasound waves (photoacoustic effect) which are focused by an acoustic lens and captured by a specific 1- or 2D sensor array and subsequently displayed as a C-scan on a computer screen.
Vikram S. Dogra, Navalgund A. H. K. Rao
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An inexpensive computer-controlled ultrasonic C-scan system
NDT International, 1983Abstract A microcomputer-controlled ultrasonic C-scan system is described with emphasis on interfacing and image formation. Examples are given which illustrate the potential of the system for quantitative C-scanning and image enhancement. The system was assembled from inexpensive off-the-shelf items of equipment.
M. Moghisi, D.P. Almond
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Blind image-deconvolution for ultrasonic C-scans
AIP Conference Proceedings, 2001Ultrasonic C-scan images suffer from the problem of gating truncations, blurring due to quantization and squaring distortion, and noise. In this work the H∞ identification strategy is presented to restore the image without any prior information about the distortion and noise, hence the scheme is called blind deconvolution.
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B-Scan and C-Scan Imaging in the Orbit
1978Many authors (Coleman et al., 1972; Ossoinig & Till, 1975) have reported the use of A-scan and B-scan techniques in orbital diagnosis.
Marie Restori +2 more
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Research of Ultrasonic C-scan Imaging Lateral Resolution
2019 IEEE International Conference on Mechatronics and Automation (ICMA), 2019Aiming at the problem of reflective C-scan imaging lateral resolution, this paper proposes to use the right-angle crack reflection method to measure the lateral resolution of ultrasonic transducers. According to the theoretical sound field distribution at the focal plane of the ultrasonic transducer, the corresponding line response function and the ...
Ran Liu +4 more
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Phased subarrays for low cost C-Scan applications
IEEE Ultrasonics Symposium, 2005., 2006The performance of subarray processing as a means of reducing overall beamforming computational load for a low cost C-Scan imaging device is analyzed. Unlike the case encountered in B-Mode imaging, the C-Scan format is characterized by a large channel count (4096 in this case) and very short data record lengths. Additionally, unlike the case in B-Mode,
Y. Li +3 more
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Novel approach to secure channel using C-SCAN and microcontroller in openflow
2013 IEEE International Conference on Advanced Networks and Telecommunications Systems (ANTS), 2013Openflow is a openly managed platform to future internet. Various approaches are given to widely implement this. The main concept of openflow is transferring the data packet in minimum path and cost which completely depends upon the controller-switch connection.
S. Veeramani +2 more
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Acoustic lens characterization for ultrasound and photoacoustic C-scan imaging modalities
2008 30th Annual International Conference of the IEEE Engineering in Medicine and Biology Society, 2008From a fundamental perspective, image reconstruction tasks in both ultrasound pulse echo and photoacoustic imaging are identical. We propose a C-scan imaging scheme that is applicable to both modalities where the image reconstruction is achieved through focusing action of an acoustic lens.
Navalgund A, Rao +5 more
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C-scan enhancement using recursive subspace deconvolution
AIP Conference Proceedings, 2002C-scan images are formed by mapping the windowed A-scan energy levels into pixel values. This operation limits the resolution of the resulting image due to the blurring effect of squared summations and the mechanical positioning resolution. However, one feature that is found in all such images that they are usually scanned in a raster scanning fashion (
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Three-Dimensional Ultrasound C-Scan Imaging Using Holographic Reconstruction
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 1986A three-dimensional ultrasound C-scan imaging method based on holographic reconstruction has been developed. Using wide angle coherent illumination of the object and holographic principles, high lateral resolution is achieved throughout the imaging space.
J, Ylitalo +4 more
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