Contrast‐to‐noise ratio (CNR) as a quality parameter in fMRI [PDF]
Journal of Magnetic Resonance Imaging, 2007 AbstractPurposeTo evaluate the impact of data quality on the localization of brain activation in functional magnetic resonance imaging (fMRI) and to explore whether the temporal contrast‐to‐noise‐ratio (CNR) provides a quantitative parameter to estimate fMRI quality.Materials and MethodsWe investigated two methods for defining the CNR by comparing them
Geissler, Alexander +5 more
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Improvements in elastographic contrast-to-noise ratio using spatial-angular compounding [PDF]
Ultrasound in Medicine & Biology, 2005 Spatial-angular compounding is a new technique developed for improving the signal-to-noise ratio (SNR) in elastography. Under this method, elastograms of a region-of-interest (ROI) are obtained from a spatially weighted average of local strain estimated along different insonification angles.
Udomchai, Techavipoo, Tomy, Varghese
openaire +2 more sources
Noise Properties of Superconducting Coplanar Waveguide Microwave Resonators [PDF]
, 2007 We have measured noise in thin-film superconducting coplanar waveguide resonators. This noise appears entirely as phase noise, equivalent to a jitter of the resonance frequency.
Benjamin A. Mazin +5 more
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A study on correlation between thyroid CT radiation dose, image quality and female body composition [PDF]
Zhongguo aizheng zazhiBackground and purpose: With the increasing use of medical imaging examinations, Computed tomography (CT) scans have become one of the primary sources of effective dose.
SHEN Xigang, LIN Chengxiang, PENG Weijun, GU Yajia
doaj +1 more source
Length summation in noise [PDF]
, 2019 To investigate the effect of background noise on visual summation, we measured the contrast detection thresholds for targets with or without a white noise mask in luminance contrast. The targets were Gabor patterns placed at 3° eccentricity to either the
Chen, C-C., Tyler, C. W., Yeh, Y-H. C.
core +1 more source
Excess noise characteristics of Al0.8Ga0.2As avalanche photodiodes [PDF]
, 2002 The avalanche noise characteristics of Al0.8Ga0.2 As have been measured in a range of p-i-n and n-i-p diodes with i-region widths ω varying from 1.02 to 0.02 μm.
David, J.P.R. +5 more
core +1 more source
Enhancement of microvessel in laser speckle image using gaussian kernel template [PDF]
Journal of Innovative Optical Health Sciences, 2019 Laser speckle contrast imaging (LSCI) is an optical imaging method, which can monitor microvascular flow variation directly without addition of any ectogenous dye.
Yameng Zhang +4 more
doaj +1 more source
Objective and efficient terahertz signal denoising by transfer function reconstruction [PDF]
, 2020 As an essential processing step in many disciplines, signal denoising efficiently improves data quality without extra cost. However, it is relatively under-utilized for terahertz spectroscopy.
Chen, Xuequan +3 more
core +1 more source
Appearance of fractional charge in the noise of non-chiral Luttinger liquids [PDF]
, 2004 The current noise of a voltage biased interacting quantum wire adiabatically connected to metallic leads is computed in presence of an impurity in the wire.
Dolcini, F. +3 more
core +2 more sources
Monte Carlo-based Noise Compensation in Coil Intensity Corrected Endorectal MRI [PDF]
, 2015 Background: Prostate cancer is one of the most common forms of cancer found in males making early diagnosis important. Magnetic resonance imaging (MRI) has been useful in visualizing and localizing tumor candidates and with the use of endorectal coils ...
Haider, Masoom +3 more
core +2 more sources