Results 31 to 40 of about 1,946 (242)

DeepResp: Deep learning solution for respiration-induced B0 fluctuation artifacts in multi-slice GRE

NeuroImage, 2021
Respiration-induced B0 fluctuation corrupts MRI images by inducing phase errors in k-space. A few approaches such as navigator have been proposed to correct for the artifacts at the expense of sequence modification.
Hongjun An, Hyeong-Geol Shin, Sooyeon Ji, Woojin Jung, Sehong Oh, Dongmyung Shin, Juhyung Park, Jongho Lee   +7 more
doaj   +1 more source

Ghost echoes on the Earth–Moon path [PDF]

Nature, 1975
ON July 7, 1974 while using a Moon Bounce technique on 1,296 MHz I observed the appearance of strange, delayed echoes. My equipment consists of a parabolic antenna 26 feet in diameter with a circularly polarised feed horn driven with 500-W continuous wave from a transmitter.
openaire   +1 more source

Study of Effect of Raw Data Compression on Azimuth Multi-channel SAR System

Leida xuebao, 2017
An effective way to achieve High Resolution and Wide Swath (HRWS) imaging capability is the multi-channel technique in azimuth. Improved resolution and swath can dramatically increase the volume of echo data in the SAR system.
Zhao Yao, Deng Yunkai, Wang Yu, Li Ning, Wang Wei   +4 more
doaj   +1 more source

Confidence in uncertainty: Error cost and commitment in early speech hypotheses. [PDF]

PLoS ONE, 2018
Interactions with artificial agents often lack immediacy because agents respond slower than their users expect. Automatic speech recognisers introduce this delay by analysing a user's utterance only after it has been completed.
Sebastian Loth, Katharina Jettka, Manuel Giuliani, Stefan Kopp, Jan P de Ruiter   +4 more
doaj   +1 more source

Two-Dimensional Spatial Coherence for Ultrasonic DMAS Beamforming in Multi-Angle Plane-Wave Imaging

Applied Sciences, 2019
Ultrasonic multi-angle plane-wave (PW) coherent compounding relies on delay-and-sum (DAS) beamforming of two-dimensional (2D) echo matrix in both the dimensions PW transmit angle and receiving channel to construct each image pixel.
Che-Chou Shen, Pei-Ying Hsieh
doaj   +1 more source

MRI receiver frequency response as a contributor to Nyquist ghosting in echo planar imaging [PDF]

Journal of Magnetic Resonance Imaging, 2005
AbstractPurposeTo study the frequency response characteristic of the MRI signal receiver system as a contributing factor to the formation of Nyquist ghosting in echo‐planar imaging (EPI).Materials and MethodsExperimental work was undertaken on a 1.5 T system.
Ioannis, Delakis, Krystallia, Petala, Janet P, De Wilde   +2 more
openaire   +2 more sources

Lipid elimination with an echo‐shifting N/2‐ghost acquisition (LEENA) MRI [PDF]

Magnetic Resonance in Medicine, 2014
PurposeThe Dixon techniques provide uniform water‐fat separation but require multiple image sets, which extend the overall acquisition time. Here, an alternative rapid single acquisition method, lipid elimination with an echo‐shifting N/2‐ghost acquisition (LEENA), was introduced.MethodsThe LEENA method utilized a fast imaging with steady‐state free ...
Lan, Lu, Shannon B, Donnola, Michaela, Koontz, Mark A, Griswold, Jeffrey L, Duerk, Chris A, Flask   +5 more
openaire   +2 more sources

Conceptualising quality early childhood education: Learning from young children in Brazil and South Africa through creative and play‐based methods

British Educational Research Journal, EarlyView., 2023
Abstract Early childhood has increasingly been acknowledged as a vital time for all children. Inclusive and quality education is part of the United Nations Sustainable Development Goals, with the further specification that all children have access to quality pre‐primary education.
Laura H. V. Wright, Irene Rizzini, Malibongwe Gwele, Lynn McNair, Cristina Laclette Porto, Marsha Orgill, E. Kay M. Tisdall, Malcolm Bush, Linda Biersteker   +8 more
wiley   +1 more source

Hong Kong echoes across English ghost lands: A decolonizing of English-language poetry

Journal of Postcolonial Writing, 2023
his article focuses on three women poets who deploy a Hong Kong Chinese imaginary, an imaginarium filled with memories, popular cultural references, fragments of Cantonese, and isolated Chinese characters. Jennifer Lee Tsai was born in the UK of Hong Kong immigrant parents, while Jennifer Wong migrated from Hong Kong to the UK first to study and then ...
openaire   +4 more sources

Improved Row-Column-Addressed Array Imaging by Leveraging Ghost Echoes

2023 IEEE International Ultrasonics Symposium (IUS), 2023
Among various choices of 2-D ultrasound transducer arrays, the row-column-addressed (RCA) 2-D array has shown its promise for 3-D imaging. However, RCA suffers from notable edge effects and thus receives ghost echoes, which result in ghost artifacts showing in the volumetric image.
Mei, Chung-Shiang, Li, Meng-Lin
openaire   +2 more sources