Arterial Spin LabelingSpectroscopyFMRIContinuousPerfusion-weightedESEEMInversionReadoutFunctionalNeutronSpectraElectron spin densityMagnetic fieldDecayTurbo spin echoEfficiencyCardiacGradient-echo phaseUltra-Short Echo TimeSpectrumTeslaSequenceBunnymenInfusionPlanarDiagnosisCerebralIntensityImagingProteinDelaysTimeTechniqueImage
Arterial Spin Labeling25
- Our aim was to measure the CBF, oxygen extraction fraction, and cerebral metabolic rate of oxygen use in patients with different severities of middle cerebral artery stenosis or acute stroke by using the arterial spin-labeling and susceptibility-weighted imaging techniques. (ajnr.org)
- Arterial spin-labeling and SWI sequences were used to acquire CBF, oxygen extraction fraction, and cerebral metabolic rate of oxygen. (ajnr.org)
- Both OEF and CBF can be determined using MR susceptometry and arterial spin-labeling (ASL). (ajnr.org)
- Imaging techniques such as susceptibility-weighted imaging (SWI), T2* gradient echo (GRE), or arterial spin labeling-based perfusion-weighted MRI (ASL-PWI) facilitate diagnosis. (medscape.com)
- Purpose To explore the ability of pseudo-continuous arterial spin labeling (PCASL) to identify splenic switch-off in patients with suspected CAD. (unav.edu)
- Arterial spin labeling (ASL) is a noncontrast perfusion imaging method that relies on the magnetic labeling of arterial water. (radiologykey.com)
- Arterial spin labeling MRI at baseline will be used to test whether brain perfusion can predict outcomes. (biomedcentral.com)
- Shielded dual-loop resonator for arterial spin labeling at the neck. (mpg.de)
- Technological aspects of human brain perfusion imaging by continuous arterial spin labeling. (mpg.de)
- Regional effects of magnetization dispersion on quantitative perfusion imaging for pulsed and continuous arterial spin labeling. (mpg.de)
- Retinotopic maps and hemodynamic delays in the human visual cortex measured using arterial spin labeling. (mpg.de)
- Functional localization in the human brain: gradient-echo, spin-echo, and arterial spin-labeling fMRI compared with neuronavigated TMS. (mpg.de)
- Comparison of pulsed arterial spin labeling encoding schemes and absolute perfusion quantification. (mpg.de)
- Continuous arterial spin labeling at the human common carotid artery: The influence of transit times. (mpg.de)
- Continuous arterial spin labeling using a local magnetic field gradient coil. (mpg.de)
- We investigated pulsed continuous arterial spin labeling combined with background suppression for renal perfusion imaging at 3 Tesla using single shot fast spin echo acquisition. (ismrm.org)
- As an original technique, a cine arterial spin labeling (ASL) cardiovascular magnetic resonance approach is demonstrated to be able to produce dynamic MBF maps across the cardiac cycle in rats. (biomedcentral.com)
- Clinical value of arterial spin labeling imaging in the diagnosis of early parotid gland injury in Sjögren's syndrome[J]. Chin J Magn Reson Imaging, 2023, 14(5): 92-95, 131. (med-sci.cn)
- [Abstract] Objective To investigate the value of arterial spin labeling (ASL) technology in the evaluation of early parotid gland damage in Sjögren's syndrome (SS). (med-sci.cn)
- In the conventional approach to arterial spin labeling in the rodent heart, the relative difference in the apparent T 1 relaxation times corresponding to selective and non-selective inversion is related to perfusion via a two compartment model of tissue. (biomedcentral.com)
- To quantify perfusion, the Arterial Spin Labeling (ASL) technique uses water protons as a freely diffusible contrast agent. (biomedcentral.com)
- The concept was tested on phantoms and human brains at 3 T. In addition, the proposed reordering scheme was applied to pseudo-continuous arterial spin labeling for evaluating the efficiency of the centric reordering in magnetization-prepared imaging. (kaist.ac.kr)
- In pseudo-continuous arterial spin labeling results, 3-fold temporal SNR increase and 2-fold spatial SNR increase in the perfusion-weighted images were achieved with 1sh-CenEPI compared with the conventional linear ordering, whereas the cerebral blood flow values were consistent with previous studies. (kaist.ac.kr)
- ParaVision 360 introduces the workflow package for Arterial Spin Labeling (ASL) to explore the scan programs even more (Figure 2). (news-medical.net)
- This package was developed in an industrial-academic cooperation with the Grenoble Institute of Neuroscience and gives optimal results when utilized in combination with a dedicated Arterial Spin Labeling coil 1 . (news-medical.net)
Spectroscopy7
- In addition, neutron spin echo (NSE) spectroscopy experiments were conducted on nanostructured block copolymer electrolytes to determine the effect of salt on the segmental dynamics. (nist.gov)
- Spin Echo Correlation Spectroscopy (SECSY) and Exchange Spectroscopy (EXSY) are 2-dimensional techniques. (bruker.com)
- S salicylaldoxime sample material sample preparation analytical chemistry sanger-black apparatus saponification value separation process settling single-cell analysis site-directed spin labeling society for applied spectroscopy solid phase extraction sorbent tube soxhlet extractor spin echo small angle neutron scattering spot analysis stabilized liquid membrane devices standard addition standard curve standard solution stiff diagram stock solution sub-sampling chemistry suction filtration swedish ethyl acetate method. (ildestino.ro)
- Electron spin echo envelope modulation (ESEEM) spectroscopy in combination with site-directed spin labeling (SDSL) has been established as a valuable biophysical technique to provide site-specific local secondary structure of membrane proteins. (mysciencework.com)
- Multimeric (or monomeric with two or more cysteines per subunit) proteins carry more than one spin label and pulse electron paramagnetic resonance (EPR), PELDOR/DEER spectroscopy is facilitated to obtain spin-to-spin distances within a protein complex. (leeds.ac.uk)
- Alongside PELDOR, Electron Spin Echo Envelope Modulation (ESEEM) spectroscopy could be used to measure deuterium (solvent) accessibility of key residues, important in protein's function. (leeds.ac.uk)
- Neutron Spin-Echo spectroscopy (NSE) on the other hand, offers the highest energy resolution in the field of neutron spectroscopy and allows the study of slow collective motions in proteins up to several hundred nanoseconds and in the nanometer length-scale. (lu.se)
FMRI2
Continuous2
- More recently, however, a hybrid approach, known as pulsed continuous or pseudocontinuous ASL (pcASL), has become popular, in which many short-duration RF pulses can be used to effectively label arterial water over a longer duration. (radiologykey.com)
- To make the track in the label, I made a continuous punch using the Word Window Punch. (paperseedlings.com)
Perfusion-weighted1
- Gradient and spin echo ASL perfusion-weighted images were collected at multiple inflow times (500 to 2,500 ms in increments of 250 ms) to accurately fit an ASL perfusion model. (ox.ac.uk)
ESEEM7
- In ESEEM experiments, the modulation of the echo intensity as a function of the delay between the microwave pulses is monitored. (miamioh.edu)
- In 2P ESEEM experiments, a typical Hahn Echo sequence is used and the π pulse is incremented out to longer periods of τ. (miamioh.edu)
- The amplitude or integrated area of the echo is measured for each τ, giving rise to a time domain ESEEM spectrum. (miamioh.edu)
- In 3P ESEEM experiments, τ is held constant and T is incremented, giving rise to a modulation in the three pulse stimulated echo. (miamioh.edu)
- As with 2P ESEEM, the echo intensity is measured as a function of τ + T, yielding a time domain spectrum that can be converted to a frequency domain spectrum via a Fourier Transform. (miamioh.edu)
- Electron Spin Echo Envelope Modulation (ESEEM) is one of the most popular techniques to measure the hyperfine interaction (HFI) parameters between electron spins and nearby nuclear spins. (bruker.com)
- From the analysis of the ESEEM signals detailed information about electron spin density distribution, distances and bonding angles is gained, offering valuable structural and electronic information. (bruker.com)
Inversion4
- Images are acquired without (control) and with (label) application of arterial inversion at the site of the labeling plane. (radiologykey.com)
- Efficiency of flow-driven adiabatic spin inversion under realistic experimental conditions: A computer simulation. (mpg.de)
- 1H HYSCORE of nitroxide spin probe: (right) 166 ns Chirped (± 113 MHz) inversion pulse and (left) 26 ns standard inversion pulse. (bruker.com)
- Slice-selective inversion causes signal enhancement due to in-flow of thermally stabilized spins whereas global inversion is insensitive to flow. (biomedcentral.com)
Readout3
- T2-Weighted intracranial vessel wall imaging at 7 Tesla using a DANTE-prepared variable flip angle turbo spin echo readout (DANTE-SPACE). (ox.ac.uk)
- Results: The proposed 1sh-CenEPI reduced TE from 50 ms to 1.4 ms for gradient-echo EPI, and from 100 ms to 7 ms for spin-echo EPI, while the elongation of readout duration was below 10% of the whole readout duration in most cases. (kaist.ac.kr)
- For optimum cardiac imaging quality, IntraGateUTE combines the advantages of IntraGate with those of the ultra-short echo time, radial readout UTE method. (news-medical.net)
Functional1
- An integrative model for neuronal activity-induced signal changes for gradient and spin echo functional imaging. (mpg.de)
Neutron1
- a It comprises neutron spin-echo techniques as well as novel Larmor labelling methods such as SESANS, SEMSANS and MIEZE. (cnr.it)
Spectra2
- Echo detected EPR does not suffer from the same problem and as such, very broad EPR spectra can be easily detected. (miamioh.edu)
- 4-Pulse DEER spectra of spin-labeled Cu containing protein with the pump pulse centered on the nitroxide spectrum (red arrow) and observation in the Cu spectrum (blue arrow). (bruker.com)
Electron spin density2
- The information that can be obtained from these experiments, hyperfine interactions as well as nuclear quadrolpolar interactions for I ≥ 1, can give a measure of unpaired electron spin density on a given nucleus as well as the distance between it and the electron. (miamioh.edu)
- It measures hyperfine interactions (HFI) to give detailed information about electron spin density, distances, and bonding angles. (bruker.com)
Magnetic field2
- In Echo-Detected and FT EPR, microwave pulses are used to drive electronic transitions as the magnetic field is swept. (miamioh.edu)
- In Echo Detected EPR, a Hahn Echo sequence is used and the resulting echo intensity is monitored as a function of the magnetic field. (miamioh.edu)
Decay2
- the longer the delay between the labeling and the imaging, the more SNR penalty is paid due to T1-related decay of the labeled spins. (radiologykey.com)
- Since magnetization is stored transversely during the τ mixing period, these experiments are sensitive to T 2 , or T M . The modulations from the nuclei are observed over the background of the echo decay due to transverse relaxation. (miamioh.edu)
Turbo spin echo1
- 3D diffusion tensor imaging with 2D navigated turbo spin echo. (mpg.de)
Efficiency1
- This method combines the high labeling efficiency of CASL with the reduced hardware demands of PASL. (radiologykey.com)
Cardiac1
- In the cardiac implementation of ASL, spin labeling is generally done within the detection slice. (biomedcentral.com)
Gradient-echo phase2
Ultra-Short Echo Time1
- Observation of Myelin Water at Ultra-Short Echo Time by Longitudinal Relaxographic Imaging with Spin-Echo Center-out EPI (DEPICTING). (mpg.de)
Spectrum1
- A Fourier Transform of the resulting FID yields an EPR spectrum of the electron spins that were contained within the frequency bandwidth of the π / 2 pulse. (miamioh.edu)
Tesla1
- Double-shot center-out echo planar spectrocopic imaging at 3 Tesla. (mpg.de)
Sequence4
- Field strength/Sequence A 1.5-T/PCASL (spin-echo) and first-pass imaging (gradient-echo). (unav.edu)
- Phase-cycled segmented center-out echo planar spectroscopic imaging sequence. (mpg.de)
- A Modified EPI Sequence for High-Resolution Imaging at Ultra-Short Echo Times. (mpg.de)
- High-resolution MBF maps in left ventricular myocardium were computed from steady-state perfusion-dependent gradient-echo cine images produced by the cine-ASL sequence. (biomedcentral.com)
Bunnymen1
- Echo and the Bunnymen in sunglasses and Hawaiian shirts. (spin.com)
Infusion2
- The label image has slightly less signal intensity due to the infusion of inverted magnetization provided by the inflowing labeled blood. (radiologykey.com)
- In this study, volumetric three-dimensional (3D) gradient and spin echo (GRASE) ASL was used to produce cerebral blood flow (CBF) and arterial arrival time (AAT) maps during rest and during an infusion of remifentanil. (ox.ac.uk)
Planar2
Diagnosis1
- SAS VALUE LABELS FOR 1994 NAMCS PUBLIC USE FILE Please note that the labels for the medical coding items --Reason for Visit, Diagnosis, Procedures, Medication Codes, and Generic Codes -- are provided solely for the convenience of the user. (cdc.gov)
Cerebral1
- Measuring the effects of remifentanil on cerebral blood flow and arterial arrival time using 3D GRASE MRI with pulsed arterial spin labelling. (ox.ac.uk)
Intensity1
- A modified Bloch equation was solved to derive perfusion as a function of signal intensity of flow sensitized segmented gradient echo acquisitions. (biomedcentral.com)
Imaging1
- Arterial spin labelling (ASL) has proved to be a promising magnetic resonance imaging (MRI) technique to measure brain perfusion. (ox.ac.uk)
Protein1
- In recent years the combination of site directed spin labeling and DEER became one of the most popular tools in structural protein research. (bruker.com)
Delays1
- It defines the time duration for spins to travel from the labeling plane or volume to the imaged slices and is typically between 1500 and 2000 ms. Because ischemic stroke is defined by reduced flow via proximal routes, any remaining flow to the tissue is often supplied via collateral routes, which leads to increased delays between the labeling of the spins and the arrival of those spins in the imaged voxel. (radiologykey.com)
Time4
- They followed this with the release of their fourth full-length studio album Enthrall to the Void of Bliss on October 9 that same year, this time through the record label 20 Buck Spin. (wikipedia.org)
- Regardless of the labeling approach, images are then acquired with and without labeling after allowing time for the labeled blood to pass from the site of labeling into the tissue of interest. (radiologykey.com)
- Proton-density images are acquired after the labeling and the PLD time. (radiologykey.com)
- although longer label times lead to a larger buildup of labeled spins in the voxel, the increased time may be better spent on acquiring additional pairs of label and control images for signal averaging. (radiologykey.com)
Technique1
- With this technique the dipolar interaction between electron spins is measured. (bruker.com)
Image1
- In this schematic, the inverted blood in the label image is shown in blue. (radiologykey.com)