Results 1 to 10 of about 533,442 (291)
Signal-to-noise ratio of Gaussian-state ghost imaging [PDF]
Physical Review A, 2009 The signal-to-noise ratios (SNRs) of three Gaussian-state ghost imaging configurations--distinguished by the nature of their light sources--are derived. Two use classical-state light, specifically a joint signal-reference field state that has either the maximum phase-insensitive or the maximum phase-sensitive cross correlation consistent with having a ...
Erkmen, Baris I., Shapiro, Jeffrey H.
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Signal-to-Noise Ratio Estimation in Passive Correlation-Based Imaging [PDF]
SIAM Journal on Imaging Sciences, 2013 We consider imaging with passive arrays of sensors using as illumination ambient noise sources. The first step for imaging under such circumstances is the computation of the cross correlations of the recorded signals, which have attracted a lot of attention recently because of their numerous applications in seismic imaging, volcano monitoring, and ...
Garnier, Josselin +3 more
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Signal to Noise Ratio Analysis in Virtual Source Array Imaging [PDF]
SIAM Journal on Imaging Sciences, 2015 We consider correlation-based imaging of a reflector located on one side of a passive array where the medium is homogeneous.
Garnier, Josselin +3 more
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Denoising two-photon calcium imaging data. [PDF]
PLoS ONE, 2011 Two-photon calcium imaging is now an important tool for in vivo imaging of biological systems. By enabling neuronal population imaging with subcellular resolution, this modality offers an approach for gaining a fundamental understanding of brain anatomy ...
Wasim Q Malik +3 more
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Signal-to-noise ratio and signal-to-noise efficiency in SMASH imaging [PDF]
Magnetic Resonance in Medicine, 1999 A general theory of signal-to-noise ratio (SNR) in simultaneous acquisition of spatial harmonics (SMASH) imaging is presented, and the predictions of the theory are verified in imaging experiments and in numerical simulations. In a SMASH image, multiple lines of k-space are generated simultaneously through combinations of magnetic resonance signals in ...
D K, Sodickson +4 more
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Comparison of Pulse Sequences of Magnetic Resonance Imaging for Optimization of Timing and Image Quality [PDF]
Iranian Journal of Medical Physics, 2020 Introduction: The present study aimed to three frequently used pulse sequences of magnetic resonance imaging (MRI) to assess the image quality of theses pulse sequences at short acquisition time.
Naima Amin +3 more
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Impact of different phased-array coils on the quality of prostate magnetic resonance images
European Journal of Radiology Open, 2021 Purpose: To evaluate the influence of body phased-array (BPA) receive coil setups on signal-to-noise ratio (SNR) and image quality (IQ) in prostate MRI. Methods: This prospective study evaluated axial T2-weighted images (T2W-TSE) and DWI of the prostate ...
Daniel Stocker +6 more
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Single‐image signal‐to‐noise ratio estimation [PDF]
Scanning, 2001 AbstractA method for estimating the signal‐to‐noise ratio from a single image is presented in this paper. The autocorrelation‐based technique requires that image details be correlated over distances of a few pixels, while the noise is assumed to be uncorrelated from pixel to pixel.
Thong, J.T.L., Sim, K.S., Phang, J.C.H.
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Sensors, 2022 Thermal imaging plays a vital role in structural health monitoring of various materials and provides insight into the defect present due to aging, deterioration, and fault during construction.
Ho Jong Kim +6 more
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The Application of Contrast-Enhanced 3D-STIR-VISTA MR Imaging of the Brachial Plexus
Journal of the Belgian Society of Radiology, 2022 Objective: To introduce contrast-enhanced 3D-STIR-VISTA sequence that would improve the image quality for the brachial plexus imaging and enhance the contrast between the brachial plexus and surrounding tissues.
Dingsheng Han +3 more
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