Results 11 to 20 of about 1,946 (242)

Ghost peaks simulation and reduction in high-resolution echo-planar spectroscopic imaging with flyback readout [PDF]

Scientific Reports
The undesirable aspect of echo-planar spectroscopic imaging (EPSI) is the occurrence of Nyquist ghost spectral lines. This phenomenon reduces the intensity of each true spectral line due to energy transfer into one or more ghost peaks.
Jan Weis, Magor Babos, Ram Kumar Selvaraju   +2 more
exaly   +7 more sources

Assessment of spectral ghost artifacts in echo-planar spectroscopic micro-imaging with flyback readout [PDF]

Scientific Reports
In this work, echo-planar spectroscopic imaging (EPSI) with flyback readout gradient-echo train was implemented in a preclinical MR scanner. The aim of this study is to visualize and quantify the ghost spectral lines produced by two, three and four ...
Sérgio Estrada
exaly   +6 more sources

The effect of residual Nyquist ghost in quantitative echo-planar diffusion imaging [PDF]

Magnetic Resonance in Medicine, 1999
Single-shot diffusion-weighted echo-planar imaging (EPI) is typically used for most clinical diffusion studies due to its low sensitivity to patient motion. Although the Nyquist ghost artifact in EPI can be substantially reduced, there is frequently a residual ghost with low signal intensity.
Alan Connelly, David Porter, Fernando Calamante   +2 more
exaly   +3 more sources

Sensitivity and resolution enhancement in the SERF experiment using perfect echo and by elimination of axial peaks and ghost couplings

Journal of Magnetic Resonance Open, 2022
Due to its inherent insensitivity amongst the spectroscopic techniques, improvements in sensitivity and resolution are always demanding in NMR spectroscopy.
Sandeep Kumar Mishra, Neeru Arya, N Suryaprakash   +2 more
exaly   +3 more sources

A robust self-referenced 2D nyquist ghost correction for different MRI-biomarker measurements based on multi-band interleaved EPI

Frontiers in Physics, 2023
Purpose: To enable 2D Nyquist ghost correction for multi-band interleaved echo-planar imaging (EPI) without reference scan.Methods: 2D phase errors between positive and negative echo were directly measured from the multi-band interleaved EPI data ...
Xiaoxi Liu, Xiaoxi Liu, Shihui Chen, Di Cui, Edward S. Hui, Edward S. Hui, Edward S. Hui, Queenie Chan, Nan-Kuei Chen, Nan-Kuei Chen, Hing-Chiu Chang, Hing-Chiu Chang   +11 more
doaj   +1 more source

Enhancement of ice-phase precipitation caused by thermal forcing produces ghost echoes over the Tibetan Plateau

npj Climate and Atmospheric Science, 2021
Whether tall storms produce heavy precipitation is currently a controversial topic. Here, we used seven years of observations from the dual-frequency precipitation radar and found that there is a rare but unique vertical precipitation structure over the ...
Yilun Chen, Aoqi Zhang, Shumin Chen, Chaoyong Tu, Weibiao Li, Yunfei Fu   +5 more
doaj   +1 more source

Estimation of High-Frequency Vibration Parameters for Airborne Terahertz SAR Using Chirplet Decomposition and LS Sequential Estimators

Remote Sensing, 2022
Due to the short wavelength of the terahertz wave, airborne terahertz synthetic aperture radar (THz-SAR) suffers from echo phase errors caused by the high-frequency vibration of the platform.
Zhaoxin Hao, Jinping Sun, Qing Li, Tao Shan   +3 more
doaj   +1 more source

Interpretation Peculiarities of the Sleeping Beauty Motif in D.H. Lawrence`s Short Story “Princess” [PDF]

Вісник університету ім. А. Нобеля. Серія Філологічні науки, 2021
The reception of D.H. Lawrence`s works in Western and Ukrainian literary criticism is reflected in detail in Natalia Styrnik`s thesis. She concluded that Lawrence`s short stories remain underexplored in modern Ukrainian literary criticism.
Lyudmyla M. Kulakevych
doaj   +1 more source

THE POSTMODERN CITY TEXT IN SERHIY ZHADAN’S POETICS [PDF]

Вісник університету ім. А. Нобеля. Серія Філологічні науки, 2023
The article explores the display mechanisms of the postmodern city as a text in Serhiy Zhadan’s works during the period between 2008 up to 2022. We’ve investigated the city representation tools portrayed in the diachronic aspect.
Tetiana M. Starostenko. , Ianina V. Gurtova   +1 more
doaj   +1 more source

Quantification and reduction of ghosting artifacts in interleaved echo‐planar imaging [PDF]

Magnetic Resonance in Medicine, 1997
AbstractA mathematical analysis of ghosting artifacts often seen in interleaved echo‐planar images (EPI) is presented. These artifacts result from phase and amplitude discontinuities between lines of k‐space in the phase‐encoding direction, and timing misregistrations from system filter delays.
S B, Reeder, E, Atalar, B D, Bolster, E R, McVeigh   +3 more
openaire   +2 more sources