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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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Use of the C-scan in evaluation of peripheral lymphedema.
Lymphology, 1997The C-(cutaneous)-scan constitutes a simple way to evaluate the status of the lymphatic system of swollen and apparently normal extremities. We have termed the procedure C-scan because this expression emphasizes the injection of the radiotracer into the cutis.
C, Ketterings, S, Zeddeman
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Vibro-Acoustography: Speckle Free Ultrasonic C-Scan
2002In an in vitro experiment the acoustic emission characteristics of broken and intact struts on BSCC valves exhibited different frequency responses and different vibro-acoustography images. The images indicated that the vibration modes of the object could be deduced in addition to the structural integrity of the object.
James F. Greenleaf +2 more
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An efficient hole-filling algorithm for C-scan enhancement
AIP Conference Proceedings, 2002In this paper, a simple interpolation technique is presented that can approximate the broken edges of an image by polynomial approximation of the vicinities of the open ends. A preprocessing step of ‘specifying’ the abscissa for the binary image pixels. This corresponds to re re-arranging the co-existing pixels with a small and monic displacement. This
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Screening of Metal Matrix Composites Using Ultrasonic C-Scans
Journal of Composites Technology and Research, 1989Ultrasonic C-scans can be used to find some types of defects in continuous fiber-reinforced metal matrix composites such as boron/aluminum composites. These defects are related to the fatigue behavior and fracture location of each inspected specimen. The C-scan technique determined the relative amount of defects in boron/aluminum composites.
GP Sendeckyj +4 more
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An Experimental Investigation of the ‘hosepipe’ Technique of Real-Time C-Scanning
1982This paper describes an in-vitro experimental study of the ‘hosepipe’ real-time C-scanning technique proposed by Whittingham (1982) at the 10th International Symposium on Acoustical Imaging. This technique was proposed as a means of overcoming the ‘go and return’ time redundancy inherent in conventional pulse-echo C-scanning without recourse to ...
C. P. Oates, T. A. Whittingham
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Alternative to Single-Pixel C-Scan Analysis for Measuring POD
AIP Conference Proceedings, 2005There can be hundreds of thousands of pixels in a C‐Scan image making the probability of a false‐positive based on a single pixel almost a certainty. To control this propensity for false calls, methods have been proposed, and used with some success, to use both pixel amplitude and signal‐to‐noise ratio (noise being measured from neighboring pixels). We
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An adaptive down-sampling method of laser scan data for scan-to-BIM
Automation in Construction, 2022Ziwen Liu, Jingjing Guo, Qi Qiu
exaly