Results 41 to 50 of about 6,676 (242)

Nonlinear two-dimensional terahertz photon echo and rotational spectroscopy in the gas phase [PDF]

, 2016
Ultrafast two-dimensional spectroscopy utilizes correlated multiple light-matter interactions for retrieving dynamic features that may otherwise be hidden under the linear spectrum.
Fleischer, Sharly, Hwang, Harold Y., Lu, Jian, Nelson, Keith A., Ofori-Okai, Benjamin K., Zhang, Yaqing   +5 more
core   +2 more sources

Qualitative and Quantitative Ultrashort Echo Time Imaging of Musculoskeletal Tissues [PDF]

Seminars in Musculoskeletal Radiology, 2015
Ultrashort echo time (UTE) sequences represent a group of clinically compatible techniques that are capable of using echo times < 1 ms. With these techniques, direct imaging of short T2/T2* tissues or tissue components can now be performed. Continuing modifications to the UTE techniques have allowed for faster and more robust sequences now comparable ...
Chang, Eric Y, Du, Jiang, Bae, Won C, Chung, Christine B   +3 more
openaire   +4 more sources

MRI-based porosity index (PI) and suppression ratio (SR) in the tibial cortex show significant differences between normal, osteopenic, and osteoporotic female subjects

Frontiers in Endocrinology, 2023
IntroductionUltrashort echo time (UTE) MRI enables quantitative assessment of cortical bone. The signal ratio in dual-echo UTE imaging, known as porosity index (PI), as well as the signal ratio between UTE and inversion recovery UTE (IR-UTE) imaging ...
Saeed Jerban, Saeed Jerban, Saeed Jerban, Yajun Ma, Yajun Ma, Dina Moazamian, Jiyo Athertya, Sophia Dwek, Hyungseok Jang, Hyungseok Jang, Gina Woods, Christine B. Chung, Christine B. Chung, Eric Y. Chang, Eric Y. Chang, Jiang Du, Jiang Du   +16 more
doaj   +1 more source

Spectral-phase interferometry for direct electric-field reconstruction applied to seeded extreme-ultraviolet free-electron lasers [PDF]

, 2015
We present a setup for complete characterization of femtosecond pulses generated by seeded free-electron lasers (FEL's) in the extreme-ultraviolet spectral region.
Dacasa, Hugo, De Ninno, Giovanni, Garzella, David, Gauthier, David, Lozano, Magali, Mahieu, Benoît, Merdji, Hamed, Rousseau, Jean-Philippe, Zeitoun, Philippe   +8 more
core   +3 more sources

High-Contrast Lumbar Spinal Bone Imaging Using a 3D Slab-Selective UTE Sequence

Frontiers in Endocrinology, 2022
Ultra-short echo time (UTE) MRI with post-processing is a promising technique in bone imaging that produces a similar contrast to computed tomography (CT).
Amir Masoud Afsahi, Alecio F. Lombardi, Alecio F. Lombardi, Zhao Wei, Michael Carl, Jiyo Athertya, Koichi Masuda, Mark Wallace, Roland R. Lee, Roland R. Lee, Ya-Jun Ma   +10 more
doaj   +1 more source

Ultrashort echo time magnetization transfer (UTE‐MT) imaging of cortical bone [PDF]

NMR in Biomedicine, 2015
Magnetization transfer (MT) imaging is one way to indirectly assess pools of protons with fast transverse relaxation. However, conventional MT imaging sequences are not applicable to short T2 tissues such as cortical bone. Ultrashort echo time (UTE) sequences with TE values as low as 8 µs can detect signals from different water components in cortical ...
Chang, EY, Bae, WC, Shao, H, Biswas, R, Li, S, Chen, J, Patil, S, Healey, R, D'Lima, DD, Chung, CB, Du, J   +10 more
openaire   +5 more sources

Rapid dual‐RF, dual‐echo, 3D ultrashort echo time craniofacial imaging: A feasibility study [PDF]

Magnetic Resonance in Medicine, 2018
PurposeTo develop a dual‐radiofrequency (RF), dual‐echo, 3D ultrashort echo‐time (UTE) pulse sequence and bone‐selective image reconstruction for rapid high‐resolution craniofacial MRI.MethodsThe proposed pulse sequence builds on recently introduced dual‐RF UTE imaging. While yielding enhanced bone specificity by exploiting high sensitivity of short T2
Hyunyeol, Lee, Xia, Zhao, Hee Kwon, Song, Rosaline, Zhang, Scott P, Bartlett, Felix W, Wehrli   +5 more
openaire   +2 more sources

Effective Detection of Nafion^®-Based Theranostic Nanocapsules Through ¹⁹F Ultra-Short Echo Time MRI

Nanomaterials, 2020
The application of the Three-Dimensional Ultra-Short Echo Time (3D UTE)pulse sequence at a high magnetic field for visualization of the distribution of 19F loaded theranostic core-shell nanocapsules with Nafion® (1,1,2,2-tetrafluoroethene; 1,1,2,2 ...
Natalia Łopuszyńska, Krzysztof Szczepanowicz, Krzysztof Jasiński, Piotr Warszyński, Władysław P. Węglarz   +4 more
doaj   +1 more source

Photon echoes of molecular photoassociation

, 2004
Revivals of optical coherence of molecular photoassociation driven by two ultrashort laser pulses are addressed in the Condon approach. Based on textbook examples and numerical simulation of KrF excimer molecules, a prediction is made about an existence ...
Dykhne, Alexander M., Rudavets, Alexander G.   +1 more
core   +1 more source

AASLD practice guidance on drug, herbal, and dietary supplement–induced liver injury

, 2022
Hepatology, EarlyView.
Robert J. Fontana, Iris Liou, Adrian Reuben, Ayako Suzuki, M. Isabel Fiel, William Lee, Victor Navarro   +6 more
wiley   +1 more source