Oscillating gradient spin echo
WebOscillating gradient (OG) enables the access of short diffusion times for time-dependent diffusion MRI (dMRI); however, it poses several technical challenges for clinical use. This … WebOscillating gradient spin-echo (OGSE) sequences [13–15], are sensitive to diffusion on the time scale of the oscillation period rather than the interval between
Oscillating gradient spin echo
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WebNov 15, 2024 · The oscillating gradient spin echo (OGSE) sequence (Does et al., 2003, Callaghan and Stepianik, 1995) was introduced to reach short diffusion times. An OGSE sequence usually consists of two oscillating pulses of duration T , each containing n periods, hence the frequency is ω = n 2 π T , separated by a time interval τ − T . WebDec 14, 2024 · Oscillating-gradient spin-echo sequences enable the measurement of diffusion weighting with a short diffusion time and can provide indications of internal structures and suggest restricted diffusion due to the structure within the lesions. Expand. 1. PDF. Save. Alert.
WebThe individual 64 MHz oscillations are too fast to resolve on this time scale. Although it is convenient to think about an FID arising from the action of a 90° pulse, an FID will be created by an RF pulse of any flip angle … WebA method of gradient moment nulling that correctly compensates both spin echo and stimulated echo components has been developed. The simplest solution involves nulling …
WebThe oscillating gradient spin-echo (OGSE) method ena-bles reduced D eff by using a succession of short diffusion weighting periods (15–17). The use of bipolar gradient … WebApr 1, 2016 · Experimentally, flow-compensated (FC) pulsed-gradient spin-echo (PGSE) and oscillating-gradient spin-echo (OGSE) sequences were tested using a flow phantom and then used to examine IVIM signals in ...
WebFeb 1, 2024 · Oscillating gradient spin-echo (OGSE) sequences provide access to short diffusion times and may provide insight into micro-scale internal structures of pathologic …
WebFeb 1, 2024 · To overcome this, the oscillating gradient spin echo (OGSE) sequence has been developed to probe much shorter diffusion times with hardware limitations on … edwin lavan swan fayetteville arWebIn the pulsed gradient spin echo (PGSE) technique, the NMR signal is encoded for translational motion using a pair of magnetic field gradient pulses of duration δ and … contact cahootWebValidation of surface-to-volume ratio measurements derived from oscillating gradient spin echo on a clinical scanner using anisotropic fiber phantoms by Gregory Lemberskiy, Steven H. Baete, Martijn A. Cloos, Dmitry S. Novikov & Els Fieremans. April 2015 Mapping human brain capillary water lifetime: high‐resolution metabolic neuroimaging contact caffeineWebFeb 15, 2024 · The pulsed gradient spin echo (PGSE) scans show localized areas of signal voids (white arrow) originating by spin dephasing during muscle activation. Note the bright signal from blood vessels in the diffusion-weighted scans obtained with oscillating gradient spin echo (OGSE), indicating motion compensation. contact cahorsWebTime-dependent Diffusion in Extra-Axial Brain Tumors Investigated with Oscillating-gradient Spin-echo. Tomoko Maekawa 1, Masaaki Hori 1,2, Katsutoshi Murata 3, … edwin lardyWebMay 1, 2024 · The oscillating-gradient spin-echo (OGSE) sequence has been promoted as a promising diffusion-weighted magnetic resonance imaging (DWI) technique for probing in vivo tissue microstructure. The method was first outlined by Stepisnik [1], but it wasn’t until many years later that in vivo applications began [2], [3]. edwin lardy obituaryWebJul 8, 2024 · This study proposes a 3D oscillating gradient–prepared gradient spin-echo (OGprep-GRASE) sequence to improve SNR and shorten acquisition time for OG dMRI on clinical scanners. Methods The 3D OGprep-GRASE sequence consisted of global saturation, diffusion encoding, fat saturation, and GRASE readout modules. contact c2cfirstaidaquatics.com