Results 201 to 210 of about 21,797 (258)
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Seismic attenuation compensation by Bayesian inversion
Journal of Applied Geophysics, 2014Abstract As an effective method to improve seismic data resolution, attenuation compensation has been paid great attention. The popular method inverse Q-filter performs effectively in phase correction. But its energy compensation part is at an extraordinary discount because of its instability.
Shoudong Wang
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Attenuation compensation method based on inversion
Applied Geophysics, 2011Attenuation compensation, which corrects the attenuation and dispersion of seismic waves, is one of the effective methods for improving seismic data resolution. In general, the attenuation compensation is achieved by an inverse Q-filter based on wave field continuation. In this paper, using the Futterman attenuation model, a method to compute synthetic
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Frequency-Domain Reverse-Time Migration With Attenuation Compensation
IEEE Transactions on Geoscience and Remote Sensing, 2023Xiong Ma, Guofa Li
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Automatic attenuation compensation for ultrasonic imaging
Ultrasound in Medicine & Biology, 1997A new method has been developed for the automatic correction for attenuation in ultrasonic pulse-echo imaging. By assuming that a specified relationship holds between local attenuation and local backscatter throughout each pulse-echo signal, a gain factor may be calculated that more appropriately compensates for attenuation at every depth.
D I, Hughes, F A, Duck
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Compensating for attenuation by Gabor deconvolution
67th EAGE Conference & Exhibition, 2005Both Gabor deconvolution and inverse-Q filtering methods are based on the constant Q-model theory for attenuation of seismic waves. Gabor deconvolution methodologically differs from inverse-Q filter in that the compensation for attenuation and the inversion of the minimum phase wavelet component of the seismic trace are carried out simultaneously.
C. A. Montana, G. F. Margrave
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Attenuation Compensation and Estimation
2013Estimating the loss of ultrasound signal with propagation depth as a function of frequency is essential for quantifying tissue properties. Specifically, ultrasound attenuation is used to correct for spectral distortion prior to estimating quantitative ultrasound parameters to assess the tissue.
Timothy A, Bigelow, Yassin, Labyed
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Attenuation compensation based on U-Net
82nd EAGE Annual Conference & Exhibition, 2021Summary The effect of absorption attenuation on seismic wave is shown in amplitude attenuation and phase dispersion, which greatly reduces the resolution of the seismic profile. Attenuation compensation method is commonly used to eliminate these effects. Lots of researches about attenuation compensation have been carried out for many years.
C. Zhou +5 more
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Compensating Digital Attenuator Differential Phase Shift
2008 14th Conference on Microwave Techniques, 2008Controlled attenuators are key elements in a phased array's beam forming network and generally in all those systems requiring accurate control of the RF signal's amplitude and phase. Therefore the realisation of constant- phase digital attenuators is essential to obtain advanced system performance.
CICCOGNANI, WALTER +3 more
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Attenuation and scatter compensation in myocardial perfusion SPECT
Seminars in Nuclear Medicine, 1999Nonuniform attenuation, Compton scatter, and limited, spatially varying resolution degrade both the qualitative and quantitative nature of myocardial perfusion SPECT. Physicians must recognize and understand the effects of these factors on myocardial perfusion SPECT for optimal interpretation and use of this important imaging technique.
J R, Galt, J, Cullom, E V, Garcia
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