Results 31 to 40 of about 533,442 (291)
Measuring signal‐to‐noise ratio in partially parallel imaging MRI [PDF]
Medical Physics, 2011 Purpose:To assess five different methods of signal‐to‐noise ratio (SNR) measurement for partially parallel imaging (PPI) acquisitions.Methods:Measurements were performed on a spherical phantom and three volunteers using a multichannel head coil a clinical 3T MRI system to produce echo planar, fast spin echo, gradient echo, and balanced steady state ...
Frank L, Goerner, Geoffrey D, Clarke
openaire +2 more sources
IEEE Photonics Journal, 2019 Photoacoustic tomography is a technique to reconstruct the image of light energy absorption distribution in tissues based on the detected photoacoustic signals. In recent years, this research field has been greatly developed, and its application range is
Meng Zhou +4 more
doaj +1 more source
HDR Imaging with Spatially Varying Signal-to-Noise Ratios
2023 IEEE/CVF Conference on Computer Vision and Pattern Recognition (CVPR), 2023 While today's high dynamic range (HDR) image fusion algorithms are capable of blending multiple exposures, the acquisition is often controlled so that the dynamic range within one exposure is narrow. For HDR imaging in photon-limited situations, the dynamic range can be enormous and the noise within one exposure is spatially varying.
Chi, Yiheng +2 more
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On the efficiency of computational imaging with structured illumination
, 2018 A generic computational imaging setup is considered which assumes sequential illumination of a semi-transparent object by an arbitrary set of structured illumination patterns.
Gureyev, T. E. +4 more
core +1 more source
Acousto-optical coherence tomography with a digital holographic detection scheme [PDF]
, 2012 Acousto-optical coherence tomography (AOCT) consists in using random phase jumps on ultrasound and light to achieve a millimeter resolution when imaging thick scattering media. We combined this technique with heterodyne off-axis digital holography.
Benoit, Emilie +4 more
core +5 more sources
Remote SensingPhotonic integrated interferometric imaging systems (PIISs) provide a compact solution for high-resolution Earth observation missions with stringent size, weight, and power (SWaP) constraints.
Chuang Zhang, Yan He, Qinghua Yu
doaj +1 more source
Design and Performance Evaluation of a Time Domain Microwave Imaging System [PDF]
, 2013 We design a time domain microwave system dedicated to medical imaging. The measurement accuracy of the system, that is, signal-to-noise ratio, due to voltage noise and timing noise, is evaluated.
Fhager, Andreas +4 more
core +2 more sources
A Dual-Transducer Approach for High-Resolution and High-Precision Shear Wave Elasticity Imaging
SensorsShear wave elasticity imaging, an ultrasound-based method for imaging tissue elasticity, has been widely accepted in both preclinical studies and clinical practices for diagnosing various diseases.
Jingfei Liu, Stanislav Y. Emelianov
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Improving the Signal-to-Noise Ratio of Superresolution Imaging Based on Single-Pixel Camera
IEEE Photonics Journal, 2019 Based on the theories of single-pixel camera and compressed sensing image reconstruction, the sparse basis, the projection method of measurement matrix, and the signal reconstruction algorithm are optimized. First, for the sparse representation of image,
Ziran Wei +5 more
doaj +1 more source
FEBS Letters, EarlyView.Fluorescent probes allow dynamic visualization of phosphoinositides in living cells (left), whereas mass spectrometry provides high‐sensitivity, isomer‐resolved quantitation (right). Their synergistic use captures complementary aspects of lipid signaling. This review illustrates how these approaches reveal the spatiotemporal regulation and quantitative
Hiroaki Kajiho +3 more
wiley +1 more source