Results 131 to 140 of about 406,343 (328)

Infrared Thermography for Weld Inspection: Feasibility and Application [PDF]

, 2018
Traditional ultrasonic testing (UT) techniques have been widely used to detect surface and sub-surface defects of welds. UT inspection is a contact method which burdens the manufacturer by storing hot specimens for inspection when the material is cool ...
Collins, William, Dorafshan, Sattar, Maguire, Marc   +2 more
core   +1 more source

Single‐Breathhold 3D MR Elastography in the Liver, With Simultaneous R2* and PDFF Mapping

Magnetic Resonance in Medicine, EarlyView.
Purpose To develop a sequence for the rapid acquisition of MR elastography (MRE) parameters in 3D, with simultaneous measurement of proton‐density fat fraction (PDFF) and R2* for multiparametric assessment of liver disease. Methods The proposed sequence uses an interleaved motion‐encoding scheme to acquire 3D volumes of all motion encodings and wave ...
Donovan P Tripp, Anne‐Sophie van Schelt, Omar Darwish, Karl P Kunze, Shamsa Al Harthy, Nader S Metwalli, Ahmed M Gharib, Claudia Prieto, René M Botnar, Ralph Sinkus, Radhouene Neji   +10 more
wiley   +1 more source

Simultaneous Assessment of Intracranial Artery and Paravascular CSF Pulsation Using 3D Whole‐Brain Diffusion‐Prepared Cine bSSFP (DECAF) MRI

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose To propose a noninvasive and quantitative MRI approach to simultaneously assessing intracranial artery pulsation and paravascular cerebrospinal fluid (CSF) pulsation in the human brain. Methods We developed a 3D whole‐brain Diffusion‐prepared Cine bSSFP (DECAF) MRI technique, with improved motion‐sensitized driven‐equilibrium providing
Chang Ni, Xiangjian Hou, SeyyedKazem HashemizadehKolowri, Seong‐Eun Kim, Qiuting Wen, Nicholas A. Frost, J. Scott McNally, Chun Yuan, Xiaodong Ma   +8 more
wiley   +1 more source

MR Spectroscopy Without Water Suppression Using the Gradient Impulse Response Function

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose Non‐water‐suppressed proton spectroscopy, 1H‐MRS, is desirable, as retaining the strong water resonance can facilitate automated online data corrections, internal concentration referencing, and monitoring of line narrowing effects in functional MRS.
James B. Bacon, Peter Jezzard, William T. Clarke   +2 more
wiley   +1 more source

Prototyping of the ILC Baseline Positron Target

, 2012
The ILC positron system uses novel helical undulators to create a powerful photon beam from the main electron beam. This beam is passed through a titanium target to convert it into electron-positron pairs.
Abbott, Ryan, Brooksby, Craig, Cook, Ed, Gronberg, Jeff, Javedani, Jay, Piggott, Tom   +5 more
core   +1 more source

A Model of Pulsed Eddy Current Crack Detection

, 1986
As its name implies, the pulsed eddy current (PEC) method makes use of a short burst of excitation current, rather than continuous sinusoidal (CW) current as is the case with conventional eddy current probes. Reflected fields, including flaw signal fields, are therefore time-dependent in the pulsed case, and are characterized by peak signal amplitude ...
Beissner, R., Fisher, J.
openaire   +3 more sources

Optimized Reduced Field of View and Fat Suppression Methods for Interleaved Multislice In Vivo Cardiac Diffusion Tensor Imaging

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose Slice interleaving, a limited phase encode (PE) field of view (FOV), and effective fat suppression are vital for efficient cardiac diffusion tensor imaging (cDTI) with minimal artifacts. This study aimed to optimize reduced FOV and fat suppression methods for interleaved multislice cDTI to improve signal‐to‐noise ratio (SNR) and ...
Yaqing Luo, Pedro F. Ferreira, Ke Wen, Ricardo Wage, Guang Yang, Dudley J. Pennell, Sonia Nielles‐Vallespin, Andrew D. Scott   +7 more
wiley   +1 more source

Effect of internal vortex structures in nozzles on energy conversion efficiency of self-excited pulsed SC-CO2 jets

Meitan xuebao
The utilization of high-speed jet technology to fracture coal bodies and construct gas flow channels within coal seams is a crucial method for enhancing coalbed methane recovery efficiency. The supercritical carbon dioxide (SC-CO2) jet enhances coal-seam
Jianping WEI, Gangxia JING, Yong LIU, Huidong ZHANG, Mengya GAO, Xiang LI, Shiyan LI, Changjiang CHEN   +7 more
doaj   +1 more source

Evaluation of Third‐Order Motion‐Compensated Cardiac Diffusion Tensor Imaging Across Cardiac Phases Using an Ultra‐High‐Performance Clinical Scanner

Magnetic Resonance in Medicine, EarlyView.
ABSTRACT Purpose To evaluate a third‐order motion‐compensated spin echo (M3‐MCSE) sequence at multiple cardiac phases on a clinical 3 T MRI scanner with ultra‐high performance (UHP) gradients (200 mT/m), compared with stimulated echo acquisition mode (STEAM) and second‐order MCSE (M2‐MCSE) for cardiac diffusion tensor imaging (cDTI).
Ke Wen, Pedro F. Ferreira, Alberto Di Biase Oemick, Ricardo Wage, Karl P. Kunze, Fanwen Wang, Dudley J. Pennell, Andrew D. Scott, Sonia Nielles‐Vallespin   +8 more
wiley   +1 more source

Pulsed Eddy Current Electromagnetic Signal Noise Suppression Method for Substation Grounding Grid Detection

Energies
As the primary discharge channel for fault currents, substation grounding grids are crucial for ensuring the safe and stable operation of power systems.
Su Xu, Yanjun Zhang, Ruiqiang Zhang, Xiaobao Hu, Bin Jia, Ming Ma, Jingang Wang   +6 more
doaj   +1 more source