Summary:  approximation of spin echo Janez Stepi$snika,b, * a Physics Department, Faculty of Mathematics and Physics... September 2003 Abstract Apart from the propagator theory of spin-echo diffusion measurement, the average... , the Gaussian phase approximation (GPA), is able to explain the diffusion and flow measurement by the ...

Source: Stepišnik, Janez - Department of Physics, University of Ljubljana

Collection: Physics ; Materials Science

Summary:  . The spin echo. Place a phantom in the birdcage coil. a. Measure the dependence of the signal on the flip... angle of the refocusing pulse. Prescribe an axial single slice spin echo scan. Record the value... 90° pulse. (5 points) b. Prescribe a two echo spin echo ...

Source: California at San Diego, University of - Center for Functional MRI

Collection: Biology and Medicine

Summary:  , c Pulse sequence elements used for 13 C­31 P spin-echo difference spectroscopy. The building block... of their 31 P signals can also be readily obtained from 13 C­31 P ...

Source: McIntosh, Lawrence P. - Department of Biochemistry and Molecular Biology, University of British Columbia

Collection: Biotechnology ; Biology and Medicine

Summary:  Computer Simulation of the Spin-Echo Spatial Distribution in the Case of Restricted Self... , 2000 This article concerns the question of a proper stochastic treat- ment of the spin-echo self... , the spatial distribution of the spin-echo signal is calculated from the simulated trajectories. The diffusion

Source: Stepišnik, Janez - Department of Physics, University of Ljubljana

Collection: Physics ; Materials Science

Summary:  ), (7), (8) and (9), the distributions for the phase shifts and the spin echo attenuation at different... of the spin echo diffusive diffraction in porous structures J. Stepisnik( ) Physics Department, FMF... details of the diffraction-like effect at the gradient spin ...

Source: Stepišnik, Janez - Department of Physics, University of Ljubljana

Collection: Physics ; Materials Science

Summary:  . Understanding the basic spin echo imaging sequence. a. Place a large phantom in a birdcage coil and position... in scanner. Scan the phantom using a spin echo pulse sequence with xres=256, yres=128, rhexecctrl=11 to save... , and T2 maps from spin echo data. Place a ...

Source: California at San Diego, University of - Center for Functional MRI

Collection: Biology and Medicine

Summary:  . Understanding the basic spin echo imaging sequence. a. Place a large phantom in a birdcage coil and position... in scanner. Scan the phantom using a spin echo pulse sequence with xres=256, yres=128, rhexecctrl=11 to save... . (3 points) 2. Calculate proton density, T1, and T2 maps from ...

Source: California at San Diego, University of - Center for Functional MRI

Collection: Biology and Medicine

Summary:  the basic spin echo imaging sequence. a. Place a large phantom in a birdcage coil and position in scanner... . Scan the phantom using a spin echo pulse sequence with xres=256, yres=128, rhexecctrl=11 to save raw... points) 2. Calculate proton density, T1, and T2 maps from spin ...

Source: California at San Diego, University of - Center for Functional MRI

Collection: Biology and Medicine

Summary:  the basic spin echo imaging sequence. a. Place a large phantom in a birdcage coil and position in scanner... . Scan the phantom using a spin echo pulse sequence with xres=256, yres=128, rhexecctrl=11 to save raw... pixel, or ???) (3 points) 2. Calculate proton density, T1, and T2 maps from ...

Source: California at San Diego, University of - Center for Functional MRI

Collection: Biology and Medicine

Summary:  might strongly effect the spin echo attenua- tion. There are different ways to avoid it. Here, we... Physica B 307 (2001) 158­168 Diffusion and flow in a porous structure by the gradient spin echo... The frequency analysis of relation between the NMR gradient spin ...

Source: Stepišnik, Janez - Department of Physics, University of Ljubljana

Collection: Physics ; Materials Science

Summary:  #12;#12;#12;PULSE GRADIENT SPIN ECHO MEASUREMENT OF FLOW DYNAMICS IN A POROUS STRUCTURE: NMR... . Introduction NMR measurement of spin migrations by the spin-echo [1] and magnetic resonance microscopy [2] have... , the analysis of self-diffusion and flow through a porous structure by Modulated Gradient Spin ...

Source: Stepišnik, Janez - Department of Physics, University of Ljubljana

Collection: Physics ; Materials Science

Summary:  1 Diffusion and flow dynamics in porous media by nmr spin echo JanezJanez Stepi... : Analysis and interpretation of diffusion and flow measurement by the gradient spin echo: ·averaged... Flow-area Magnetic resonance imaging of tomato plant stem leaves roots 3mm stem #12;6 Spin ...

Source: Stepišnik, Janez - Department of Physics, University of Ljubljana

Collection: Physics ; Materials Science

Summary:  to a nutation frequency of !1 / 2" = 100 kHz . For spin-echo (CP - /2 ­ ­ /2 - t2) experiments, (see Fig. S1... ) the spin-echo intervals /2 were set to an integer number of rotor periods. An 8-step phase cycle... parameters giving the longest spin-echo dephasing time, T2', for U-13C glycine were determined by direct

Source: Levitt, Malcolm H. - School of Chemistry, University of Southampton

Collection: Chemistry

Summary:  inhomogeneities. Reversible with a spin-echo sequence. Thomas Liu, BE280A, UCSD, Fall 2008 T2 * decay Gradient... as you treat them as human beings. Erwin Hahn Image: Larry Frank 180º The spin-echo can refocus... motion of spins. #12;3 Thomas Liu, BE280A, UCSD, Fall 2008 Spin Echo Source: http

Source: Liu, Thomas T. - Center for Functional MRI & Department of Radiology, University of California at San Diego

Collection: Biology and Medicine ; Engineering

Summary:  ://chickscope.beckman.uiuc.edu/roosts/carlartifacts.html #12;5 Spin-echo TE = 35 ms Gradient Echo TE = 14ms Image Contrast Different tissues exhibit... . Due to static inhomogeneities. Reversible with a spin-echo sequence. T2 * decay Gradient echo... ADC TE = echo time Gradient echo has exp(-TE/T2 *) weighting ...

Source: Liu, Thomas T. - Center for Functional MRI & Department of Radiology, University of California at San Diego

Collection: Biology and Medicine ; Engineering

Summary:  ://chickscope.beckman.uiuc.edu/roosts/carlartifacts.html #12;5 Spin-echo TE = 35 ms Gradient Echo TE = 14ms Image Contrast Different tissues exhibit... . Reversible with a spin-echo sequence. T2 * decay Gradient echo sequences exhibit T2 * decay. Gx(t) Gy... exp(-TE/T2 *) weighting Spin ...

Source: California at San Diego, University of - Center for Functional MRI

Collection: Biology and Medicine

Summary:  to random motions of spins. Not reversible. Due to static inhomogeneities. Reversible with a spin-echo... sequence. TT Liu BE280A, UCSD Fall 2005 Spin Echo Discovered by Erwin Hahn in 1950. There is nothing... Frank 180º The spin-echo can refocus the dephasing of spins due to static inhomogeneities. ...

Source: Liu, Thomas T. - Center for Functional MRI & Department of Radiology, University of California at San Diego

Collection: Biology and Medicine ; Engineering

Summary:  Princeton University, Physics 311/312 NMR and the Spin Echo, Page 1 NUCLEAR MAGNETIC RESONANCE... AND THE SPIN ECHO Introduction In this experiment we investigate the properties of several materials using... ;Princeton University, Physics 311/312 NMR and the Spin Echo, ...

Source: Princeton University, Atomic Physics

Collection: Fission and Nuclear Technologies ; Physics

Summary:  with a spin-echo sequence. Thomas Liu, BE280A, UCSD, Fall 2007 T2 * decay Gradient echo sequences exhibit T2... echo has exp(-TE/T2 *) weighting Thomas Liu, BE280A, UCSD, Fall 2007 Spin Echo Discovered by Erwin Hahn... beings. Erwin Hahn Image: Larry Frank 180º The spin-echo can refocus the dephasing of ...

Source: Liu, Thomas T. - Center for Functional MRI & Department of Radiology, University of California at San Diego

Collection: Biology and Medicine ; Engineering

Summary:  [6, 8]. We have shown earlier that the electron spin echo technique with different magnetic field... a parameter which is proportional to Fig. 1. - Left : spin echo spectra at four different gradients, right... at different pulse spacings i with ...

Source: Ecole Polytechnique, Centre de mathématiques

Collection: Mathematics

Summary:  . Not reversible. Due to static inhomogeneities. Reversible with a spin-echo sequence. #12;4 Thomas Liu, BE280A... Thomas Liu, BE280A, UCSD, Fall 2005 Spin Echo Discovered by Erwin Hahn in 1950. There is nothing... Frank 180º The spin-echo can refocus the dephasing of spins due to static inhomogeneities. ...

Source: Liu, Thomas T. - Center for Functional MRI & Department of Radiology, University of California at San Diego

Collection: Biology and Medicine ; Engineering

Summary:  effects. We propose a pulse sequence in which a diffusion- weighted spin-echo is followed by multiple... to reduce the total data acquisition time [15]. Multiple spin-echoes have previ- ously been applied... . A fast spin- echo sequence has been proposed for in vivo microimaging 1090-7807/$ - see front matter ...

Source: Andrews, Anne M. - Huck Institutes of the Life Sciences, Pennsylvania State University

Collection: Biology and Medicine

Summary:  Self-Diffusion Imaging by Spin Echo in Earth's Magnetic Field Ales Mohoric, Janez Stepisnik, Miha... out that the expression for spin echo attenuation is identical to the well-known Torrey formula only... , and the rate of particle migration. The technique uses the spin-echo RF sequence in ...

Source: Stepišnik, Janez - Department of Physics, University of Ljubljana

Collection: Physics ; Materials Science

Summary:  Unbiased Nonlinear Filtering of Fast Spin Echo MRI Images A. Samsonov1 , C. Johnson1 1 Scientific... present a novel scheme for unbiased denoising of fast spin echo (FSE) images and its application to black... -blood angiography images. Our method uses phase smoothness property of the ...

Source: Utah, University of - Scientific Computing and Imaging Institute

Collection: Computer Technologies and Information Sciences

Summary:  it? 2). A normal spin-echo pulse sequence is shown (right). Let's consider the elimination (by... the normal spin-echo pulse (problem 2, above). Let's now consider the effect of this pulse sequence... #12;Problem Set #3, CHEM/BCMB 4190/6190/8189 2 4). Once again, consider again the normal spin-echo

Source: Prestegard, James H. - Complex Carbohydrate Research Center & Department of Chemistry, University of Georgia

Collection: Chemistry ; Biology and Medicine

Summary:  inhomogeneities. Reversible with a spin-echo sequence. #12;5 Thomas Liu, BE280A, UCSD, Fall 2006 T2 * decay... Spin Echo Discovered by Erwin Hahn in 1950. There is nothing that nuclear spins will not do for you... , as long as you treat them as human beings. Erwin Hahn Image: Larry Frank 180º The spin-echo ...

Source: Liu, Thomas T. - Center for Functional MRI & Department of Radiology, University of California at San Diego

Collection: Biology and Medicine ; Engineering

Summary:  , France Abstract. - We have carried out at 4 K spin-echo measurements in both single and multilayer... -based sputtered films by means of the spin-echo method to get complementaryinformation of a micro- scopic nature... carried out at liquid helium temperature, using a frequency variable spin-echo apparatus. The rf field

Source: Ecole Polytechnique, Centre de mathématiques

Collection: Mathematics

Summary:  the magnetometer spin from its environment. As illustrated in Fig. 1d, a spin-echo sequence refocuses the unwanted... on the single-crystal diamond bulk sample. Figure 2a shows a typical spin-echo signal observed from... precession of the nuclear field causes the nitrogen-vacancy spin-echo signal to collapse and revive16 at half

Source: Lukin, Mikhail - Department of Physics, Harvard University; Yacoby, Amir - Department of Physics, Harvard University

Collection: Materials Science ; Physics

Summary:  -lattice relaxation time T1 for glycerin. (10pts) V. Use simple spin-echo method to measure the spin-spin relaxation... . Determine the lengths of the and /2 pulses. (16pts) III. Compare the difference between the off

Source: Braun, Paul - Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign

Collection: Materials Science

Summary:  for the unpolarised beam. Literature: J. J. Sakurai, Modern Quantum Mechanics, Chapter 3. Problem 6.2 A spin echo... overcome the inhomogeneous coupling with the spin echo technique. For the measurement we apply... a drawing of the evolution of the spin ensemble on the Bloch sphere. With the ...

Source: Imamoglu, Atac - Departement Physik, Eidgenössische Technische Hochschule Zürich (ETHZ)

Collection: Physics ; Materials Science

Summary:  's consider the pulsed field gradient spin-echo experiment. We will consider two 1 H nuclei at different... larger than the longest T1 value (i.e. 5 times the longest T1). 2). A normal spin-echo pulse sequence... ). Consider again the normal spin-echo pulse (problem 2, above). Let's now consider the effect of ...

Source: Prestegard, James H. - Complex Carbohydrate Research Center & Department of Chemistry, University of Georgia

Collection: Chemistry ; Biology and Medicine

Summary:  Spectral characterization of diffusion in porous media by the modulated gradient spin echo... of the modulated magnetic field gradient spin echo method, which provides information about molecular diffusion... in the frequency- domain instead in the time-domain as with the two-pulse gradient ...

Source: Stepišnik, Janez - Department of Physics, University of Ljubljana

Collection: Physics ; Materials Science

Summary:  , Michigan, United States Introduction Fast Spin Echo (FSE) is a commonly used pulse sequence that saves time... over conventional spin echo imaging by generating multiple spin echoes after a single excitation pulse... for true spin ...

Source: Fessler, Jeffrey A. - Department of Electrical Engineering and Computer Science, University of Michigan

Collection: Engineering

Summary:  in different breath-holds. T2 measurements based on 2DFT spin- echo methods require long acquisition times (10... Original Research Radial Fast Spin-Echo Method for T2-Weighted Imaging and T2 Mapping of the Liver... ­4 Purpose: To evaluate a multishot radial fast-spin ...

Source: Arizona, University of - Center for Gamma-Ray Imaging

Collection: Engineering ; Biology and Medicine

Summary:  to a spin echo. The transient spin polarization in the ground state leads to different absorption... PHYSICAL REVIEW A VOLUME 42, NUMBER 3 Light-shift-induced spin echoes in a J =t -iimB 1 AUGUST 1990... Institute of Technology (ETH), CH-8093 Zürich, Switzerland (Received 29 January1990) ...

Source: Suter, Dieter - Fachbereich Physik, Universität Dortmund

Collection: Physics

Summary:  have developed a double- quantum-filtered spin-echo (DQF-SE) NMR method to measure one-bond 13C-13C J... been shown that homonuclear J-couplings may be estimated accurately by spin-echo modulations in solids... -13C J-couplings in rhodopsin, we have combined the spin-echo technique with symmetry-based double

Source: Levitt, Malcolm H. - School of Chemistry, University of Southampton

Collection: Chemistry

Summary:  , ~ppm, of the different reflected beams in order to calculate the normalized spin-echo polarization, P... any Larmor phase difference. Consequently, the incident beam polariza- tion is retrieved as spin echo... Dynamical theory calculations of spin-echo resolved ...

Source: Schaich, William L. - Department of Physics, Indiana University

Collection: Physics

Summary:  ) on an excited state of '"Ta (Buttler 1970, Benski et a1 1974, Soares et a1 1975) and that determined by spin-echo... .8) e-? TDPAC Soares et al(l975) -64.8(1.3) Spin-echo NMR Kontani and Itoh (1967) -67.2(1.3) NMR... to be zero. The resulting value of -67.2(1.3) T for &f (strictly &/(I + K)) was close to the spin-echo ...

Source: Murray, David - Department of Engineering Science, University of Oxford

Collection: Engineering

Summary:  . Conclusion Optimal arterial visualization with the ECG-gated fast spin echo is achieved when the difference... IN ECG-GATED FAST SPIN ECHO MRA METHODS AT 3T I. P. Atanasova1,2 , P. Storey1 , R. P. Lim1 , J. Xu1 , Q... ECG-gated spin-echo based techniques for ...

Source: Laine, Andrew F, - Department of Biomedical Engineering, Columbia University

Collection: Biology and Medicine ; Engineering

Summary:  the spin echo atten- uation measurements according to Eq.4. For different gas pressure, the spectra exhibit... Autocorrelation Spectra of Air-Fluidized Granular System by the NMR Spin Echo Janez Stepisnik... of modulated gradient spin echo makes ...

Source: Stepišnik, Janez - Department of Physics, University of Ljubljana

Collection: Physics ; Materials Science

Summary:  and quantified with an uncertainty of ±0.02 Hz with a selective-excitation spin-echo NMR experiment... excite and refocus two spins at a time. Because of the selective nature of the spin-echo, couplings from... unselected spins are refocused at time t (the end of the echo); the only evolution during the spin-echo

Source: Loening, Niko - Department of Chemistry, Lewis and Clark College

Collection: Chemistry

Summary:  As NQR spin-echo spectra from x ¼ 0:08 up to x ¼ 0:40 each consist of a single broad line... Model 3001 waveform generator. The experiments utilize the spin-echo method; the transient response... [4]. NQR spectra were recorded at liquid nitrogen temperature (77 K) using the spin- echo following

Source: Boolchand, Punit - Department of Electrical and Computer Engineering, University of Cincinnati

Collection: Materials Science ; Engineering

Summary:  ?. c+ 1.5 x 1012hLC-'.This result differs considerably from the neutron spin echo data for the spin... neutron-spin echo experiment on amorphous TbNiz. Amorphous magnets with random anisotropy commonly... +r1Q2, (10) for not too large Q-values. The results of a recently performed neutron ...

Source: Ecole Polytechnique, Centre de mathématiques

Collection: Mathematics

Summary:  spin echoes and off-magic-angle sample spinning. Giuseppe Pileioa , Salvatore Mamonea , Giulia Mollicab... spin echo experiments in the solid state. The spin echoes are induced by an amplitude-modulated shaped... -Magic-Angle Spinning, Selective Pulses, ...

Source: Levitt, Malcolm H. - School of Chemistry, University of Southampton

Collection: Chemistry

Summary:  Far(r 0 r) . [36] FIG. 3. The spin echo as a function of q for different widths of gradientIn this case we... JOURNAL OF MAGNETIC RESONANCE 131, 339­346 (1998) ARTICLE NO. MN971232 Spin Echo Attenuation... - ology and theory of the pulsed gradient spin ...

Source: Stepišnik, Janez - Department of Physics, University of Ljubljana

Collection: Physics ; Materials Science

Summary:  , the hyperecho signal converges to that of the standard spin echo. The advantages of the two-pulse diffusion... processes is exquisite and was the focus of some of the earliest experimental studies (1­5). The spin echo... % relative to the spin echo, apart from ...

Source: California at San Diego, University of - Center for Functional MRI; Liu, Thomas T. - Center for Functional MRI & Department of Radiology, University of California at San Diego

Collection: Biology and Medicine ; Engineering

Summary:  precession produced in a classical manner and by Neutron Resonance are combined as two arms of a spin echo... machine. A magnetic field scan in the classical SE coil reveals a spin echo signal of the precession... )/2. Àìïëèòóäû ñïèí-ýõî ñèãíàëîâ çàâèñÿò îò è ...

Source: Titov, Anatoly - Laboratory of Molecular Beams, Petersburg Nuclear Physics Institute

Collection: Physics

Summary:  , spin echo BOLD, and asymmetric echo BOLD in human visual cortex at 7 Tesla. Background: Vasculature... , and capillaries. Unlike at lower fields (e.g. 1.5 to 4 T), Hahn Spin echo (HSE) BOLD at 7T is expected... to use shorter echo times at this field magnitude. Using asymmetric spin ...

Source: Max-Planck-Institut für biologische Kybernetik

Collection: Biology and Medicine

Summary:  -Langeuin, 1561, 38042 GrenobZe Cedex, Fmnee Abstract. - A spin echo option added to a classical Triple Axis... transfer obtainable. 1 The neutron spin echo (NSE) technique proposed by Mezei , if added to a Triple Axis... energies it is measured directly. 2 The principle of the method is analogous to the ...

Source: Ecole Polytechnique, Centre de mathématiques

Collection: Mathematics

Summary:  direction. Using a conventional 2D spin echo sequence, collect full k-space data in a single axial slice. a... option (spin echo or FSE), prescribe a single axial slice, and acquire an ASSET calibration scan over... image, you should notice at least 2 distinct areas. Label the two areas and describe the ...

Source: California at San Diego, University of - Center for Functional MRI

Collection: Biology and Medicine

Summary:  , and teacher. With his discovery of the spin echo, a phenomenon of monumental significance, Hahn launched... paradox.'' Using spin echoes, Hahn also uncov- ered the indirect or scalar coupling of nuclear spins via... hyperfine interactions. The use of spin echoes has ...

Source: Pines, Alexander - Department of Chemistry, University of California at Berkeley

Collection: Chemistry

Summary:  . With his discovery of the spin echo, a phenomenon of monumental significance, Hahn launched a major revolu... spin echoes, Hahn also uncov- ered the indirect or scalar coupling of nuclear spins via hyperfine... interactions. The use of spin echoes has also fea- ...

Source: Pines, Alexander - Department of Chemistry, University of California at Berkeley

Collection: Chemistry

Summary:  separately on real and imaginary parts of the spin-echo image. However, the results differ drastically... Removal of Intensity Bias in Magnitude Spin-Echo MRI Images by Nonlinear Diffusion Filtering Alexei... . In this paper, we demonstrate that inherent image phase smoothness of spin-echo MRI images could be ...

Source: Utah, University of - Scientific Computing and Imaging Institute

Collection: Computer Technologies and Information Sciences

Summary:  . Acquire a 256x256 full echo spin echo image at the lowest bandwidth available. Save the raw data. Repeat... the scan with a different FOV. Does the chemical shift in cm, or the chemical shift in pixels stay constant... -zero but proportional to the standard deviation of the complex noise. a. Dependence on bandwidth. Collect ...

Source: California at San Diego, University of - Center for Functional MRI

Collection: Biology and Medicine

Summary:  of Chemical Shift. Acquire a 256x256 full echo spin echo image at the lowest bandwidth available. Save the raw... on bandwidth. Collect 256x256 spin echo images at two bandwidths, for all other parameters constant. Predict... . (3 points) b. Dependence on FOV. Repeat the scan with a ...

Source: California at San Diego, University of - Center for Functional MRI

Collection: Biology and Medicine

Summary:  of Chemical Shift. Acquire a 256x256 full echo spin echo image at the lowest bandwidth available. Save the raw... . b. Dependence on FOV. Repeat the scan with a different FOV. Does the chemical shift in cm... -zero and proportional to the standard deviation of the complex noise. a. Dependence on bandwidth. Collect 256x256 ...

Source: California at San Diego, University of - Center for Functional MRI

Collection: Biology and Medicine

Summary:  /22 ***** MODIFIED ***** 1. Coherence Pathways. Place the BIRN phantom in the birdcage coil Acquire 2- echo spin echo... }. For the second echo, there are two pathways that may be present: double spin echo and stimulated echo. Three... differences between the sequences. (5points) i. SPGR ...

Source: California at San Diego, University of - Center for Functional MRI

Collection: Biology and Medicine

Summary:  . Acquire a 256x256 full echo spin echo image at the lowest bandwidth available. Save the raw data using CV... points) b. Dependence on FOV. Repeat the scan with a different FOV. Does the chemical shift in cm... -zero but proportional to the standard deviation of the complex noise. a. Dependence on bandwidth. Collect 256x256 ...

Source: California at San Diego, University of - Center for Functional MRI

Collection: Biology and Medicine

Summary:  . Luding · I.M. de Schepper Structure in cohesive powders studied with Spin-Echo Small Angle Neutron... of granular materials is a challeng- ing task. Here we present Spin-Echo Small Angle Neu- tron Scattering... of Technology a novel SANS technique #12;2 has been developed [13; 14]. Spin-Echo Small Angle Neu- tron

Source: Luding, Stefan - Faculty of Engineering Technology, Universiteit Twente

Collection: Computer Technologies and Information Sciences

Summary:  for small decoherence. We also calculate decoherence from spin echo and Rabi control sequences and show... decoherence for spin echo and Rabi sequences. We argue that these sequences should be used for quantum... . VI. DECOHERENCE FROM 1Õf NOISE AND SPIN-ECHO SEQUENCES Because actual ...

Source: Lang, Kristine M. - Department of Physics, Colorado College; Martinis, John M. - Department of Physics, University of California at Santa Barbara

Collection: Computer Technologies and Information Sciences ; Materials Science ; Physics

Summary:  for spin echoes induced by a single pulse, even when the J-splitting cannot be observed directly4 . Spin-echo... field. The solid-state RDCs are manifested as a small perturbation of the spin-echo modulations induced... , the estimation of RDCs may be performed very robustly by using a straightforward ...

Source: Levitt, Malcolm H. - School of Chemistry, University of Southampton

Collection: Chemistry

Summary:  an interferogram between a spin echo and an FID (gradient echo) generated by the refocusing pulse. We... the phase of the gradient echo but not the spin echo. The shim offset will cause the spin echo and gradient... a single slice axial spin ...

Source: California at San Diego, University of - Center for Functional MRI

Collection: Biology and Medicine

Summary:  an interferogram between a spin echo and an FID (gradient echo) generated by the refocusing pulse. You... the phase of the gradient echo but not the spin echo. The shim offset will cause the spin echo and gradient... that is homegrown. Prescribe a single slice axial ...

Source: California at San Diego, University of - Center for Functional MRI

Collection: Biology and Medicine

Summary:  under different experimental conditions. In most cases, the dominant spin-echo modulation frequency... Principles of Spin-Echo Modulation by J-couplings in Magic-Angle-Spinning Solid-State NMR Luminita... of the spin echo induced by a -pulse, as a function of the echo duration. We present ...

Source: Levitt, Malcolm H. - School of Chemistry, University of Southampton

Collection: Chemistry

Summary:  1195 Neutron resonance spin echo, bootstrap method for increasing the effective magnetic field R... field intensity in Neutron Resonance Spin Echo (NRSE) spectrometry. The limits, theoretical as well... 1988, Classification Physics Abstracts 29.30 Introduction. Neutron spin ...

Source: Ecole Polytechnique, Centre de mathématiques

Collection: Mathematics

Summary:  spin-echo k- space data set. The differences in the T2 maps illustrate the effect of the various... Processing of Radial Fast Spin-Echo Data for Obtaining T2 Estimates from a Single K-Space Data Set... . Gmitro1,3 Radially acquired fast spin-echo data can be processed to obtain T2-weighted images and a T2

Source: Arizona, University of - Center for Gamma-Ray Imaging

Collection: Engineering ; Biology and Medicine

Summary:  ­6 and since then, spin-echo measurement of a self-diffusion constant has been a common practice 7,1 and also... , we show the experimental results and evaluate the conditions and the effect. II. NMR SPIN ECHO... With the spin echo NMR, a nonuniform magnetic field magnetic field gradient ...

Source: Stepišnik, Janez - Department of Physics, University of Ljubljana

Collection: Physics ; Materials Science

Summary:  microwave pulses. A famous pulse sequence, known as "Hahn-Echo" or "Spin-Echo" (see Figure), consists... fluctuations of the qubit control fields. We offer a diploma thesis to study the benefit of different pulse

Source: Busch, Kurt - Department of Physics, Univ. Karlsruhe

Collection: Physics ; Materials Science

Summary:  . The echoes arise from a time reversal of the phase, like spin echoes, of a primary pulsed acoustic excitation... propagating wave echoes in bulk materials belong to this class. In "anharmonic oscillator" systems differ- ent

Source: Ecole Polytechnique, Centre de mathématiques

Collection: Mathematics

Summary:  using spin echo and fast spin echo sequences and based on Bloch equations were performed. Scan time... Gill University in Montreal [6].Multi- contrast combo acquisitions employing spin echo (SE) or fast spin echo (FSE... of ...

Source: Utah, University of - Scientific Computing and Imaging Institute

Collection: Computer Technologies and Information Sciences

Summary:  partial k-space data to manipulate contrast1-3 . Recently it was demonstrated that a radial fast spin-echo... (RAD-FSE)1,2 or a radial gradient and spin-echo (RAD- GRASE)3 method can be used to obtain high... for a radial fast spin-echo data set. A similar algorithm can be derived to reconstruct data with other pulse

Source: Bilgin, Ali - Department of Electrical and Computer Engineering, University of Arizona

Collection: Engineering

Summary:  ] Theilmann BJ, MRM, 51, 768 (2004). (a) (b) (c) (d) (e) (f) A Half Fourier Radial Fast Spin-Echo Method Using... -4 . In particular, radial fast spin-echo (RAD-FSE)2,3 or radial gradient and spin-echo (RAD-GRASE)4 methods have... results with the radial fast spin-echo data. Results and Discussion: The bent ...

Source: Bilgin, Ali - Department of Electrical and Computer Engineering, University of Arizona

Collection: Engineering

Summary:  technique used. Spin echo imaging is well suited to measure precisely the wall thickness of the infarct... The use of contrast agents during spin echo or ultrafast perfusion imaging3-19 is useful in the more acute... after acute myocardial infarction. In addition, spin-echo MRI was ...

Source: Pratikakis, Ioannis - Institute of Informatics and Telecommunications, National Center for Scientific Research "Demokritos"

Collection: Engineering ; Computer Technologies and Information Sciences

Summary:  interactions8-11 . The advantage to using spin echoes is that spin homogeneous widths are much less sensitive... by Raman excited spin echoes. As shown above, there are ~ 2 x 103 optical frequency channels for Pr... :YSO at 10 K. The projected spin echo storage ...

Source: Shahriar, Selim - Department of Electrical and Computer Engineering, Northwestern University

Collection: Engineering

Summary:  its electromagnetic environment, leading to a long energy relaxation time of T1 10 µs, and a spin-echo... - phy [4]. To directly observe only the geometric contribu- tion, we use a spin echo [27] pulse sequence... to acquire a phase - = (t) - C. Applying a reso- nant spin echo pulse to ...

Source: Wallraff, Andreas - Departement Physik, Eidgenössische Technische Hochschule Zürich (ETHZ)

Collection: Physics ; Materials Science

Summary:  different values of the applied gradient G. The Carr-Purcell-Meiboom-Gill (CPMG) spin echo sequence 90 y... that conventional spin echo techniques completely fail to achieve this goal [5]. EXPERIMENTAL SETUP Polarised... in the presence of a uniform applied gradient. Conventional ...

Source: Ecole Polytechnique, Centre de mathématiques

Collection: Mathematics

Summary:  . A different perspective on spin-echo attenuation due to spin motion is offered by frequency-domain analysis... field gradient is appropriate to probe the displacement power spectrum (DPS). The spin-echo attenuation... proposed by Stepisnik and Callaghan, known as the modulated gradient spin-echo method ...

Source: Stepišnik, Janez - Department of Physics, University of Ljubljana

Collection: Physics ; Materials Science

Summary:  The Spin-Echo System Reconsidered D. A. Lavis Department of Mathematics King's College, Strand... in the discussion of founda- tional issues in statistical mechanics. Among them the spin­echo system... and demonstrate that the system returns to a state equivalent to that at the initial time. This is the spin­echo

Source: Lavis, David - Department of Mathematics, King's College London

Collection: Mathematics ; Physics

Summary:  acquired with two spin-echo sequences where the 90° excitation pulses differed in phase by 90° were... design for 90° and 180° spin-echo slice-selective excitations that mitigate severe Bþ 1 inhomogeneity... excitation for 90° pulses and 180° spin-echo slice-selective pulses on an 8-channel transmit ...

Source: Goyal, Vivek K - Research Laboratory of Electronics & Department of Electrical Engineering and Computer Science, Massachusetts Institute of Technology (MIT)

Collection: Engineering

Summary:  . The spectral analysis of spin echo enables to resolve, in a simple way, how various RF-gradient pulse sequences... structure. Ó 2002 Elsevier Science (USA). All rights reserved. Keywords: Spin echo; Magnetic resonance... the spin phase average [11]. This expansion, truncated in the Gaussian approximation, ...

Source: Stepišnik, Janez - Department of Physics, University of Ljubljana

Collection: Physics ; Materials Science

Summary:  Neutron Scattering and N.M.R. Spin Echo M. BESNARD, A. J. DIANOUX Institut Laue-Langevin, 156X Centre de... of liquid cyclopropane was studied by quasielastic neutron scattering (Q.N.S.) and by N.M.R. spin-echo... value measured by N.M.R. spin-echo [5]. In this technique, diffusion of the spin system is ...

Source: Ecole Polytechnique, Centre de mathématiques

Collection: Mathematics

Summary:  behave quite differently under rotor-synchronized spin-echo sequences and zero-quantum recoupling... in the spin system. The behaviour of the coherence under a rotor-synchronized spin-echo sequence is compared... of (±N)-quantum coherences under spin-echo sequences, which generate pure J-coupling ...

Source: Levitt, Malcolm H. - School of Chemistry, University of Southampton

Collection: Chemistry

Summary:  the partial storage or shelving of atoms. Unlike direct-rf-excited spin echoes or off-resonant Raman echoes... , respectively. In a crystal of Pr3 doped Y2SiO5, we experimentally observe spin echo efficiency as high as 46... used to excite spin echoes. In this paper ...

Source: Shahriar, Selim - Department of Electrical and Computer Engineering, Northwestern University

Collection: Engineering

Summary:  the experimental observation of optical data storage by frequency-selective stimulated spin echoes based... . This experiment demonstrates the potential of spin echoes excited by electromagnetically induced transparency... in Pr31:Y2SiO5 (Pr:YSO), using spin echoes ...

Source: Shahriar, Selim - Department of Electrical and Computer Engineering, Northwestern University

Collection: Engineering

Summary:  spin echoes, may also manifest themselves in solid ;. Examples are given from the tieId of solid state... ). The implications of the spin echoes produced in these systems by various "magic sand- wiches" concerning... are explicitly : 141 #12;SPIN ECHOES IN SOLIDS 461 ...

Source: Pines, Alexander - Department of Chemistry, University of California at Berkeley

Collection: Chemistry

Summary:  spin-echo arm DIFFERENT PATH LENGTHS FOR THE DIFFERENT TRAJECTORIES ! P=1 INCLINED BORDERSINCLINED... 18.03.2011 PNPI Winter school 2011 1 SERGISSERGIS SPIN-ECHO CODING OF THE MOMENTUM TRANSFER... without tightening of the beam d #12;18.03.2011 PNPI Winter school 2011 3 Proposed solution: use ...

Source: Titov, Anatoly - Laboratory of Molecular Beams, Petersburg Nuclear Physics Institute

Collection: Physics

Summary:  on the center-of-mass mode . To probe the dynamics of the dephasing mechanism, a spin echo ex- periment... in Fig. 2, now it takes the spin echo contrast C about 100 ms to decay to 50% of its initial value... carried out a spin echo experi- ment instead, where the ...

Source: Blatt, Rainer - Institut für Experimentalphysik, Universität Innsbruck

Collection: Physics

Summary:  Fits of the spin-echo data S2 13 C chemical shifts and 1 JCC couplings from the 13 C INADEQUATE... in Fig. 3 #12;S2 Figures S1 Spin-echo evolution curves for all the six 13 C labeled isotopomers S2 13 C... presents fits of the spin-echo data in Fig. S1 to: (1 - p)cos( J ) exp(- / T2 J) + p exp(- / T2 0) (S1) #12

Source: Levitt, Malcolm H. - School of Chemistry, University of Southampton

Collection: Chemistry

Summary:  and reliability of using Hahn spin echo BOLD for high spatial resolution applications at high fields. Here we... demonstrate the spatial specificity of Hahn spin echo (HSE) BOLD by robust mapping of ocular dominance columns... a subject of debate, with only limited reproducibility demonstrated so far. ...

Source: Max-Planck-Institut für biologische Kybernetik

Collection: Biology and Medicine

Summary:  -added spin-echo signals was recorded at different modulation periods, T, but at constant acquisition time... ­ Spin echoes. Abstract. ­ A novel insight into the dynamics of a fluidized granular system is given... by a nuclear magnetic resonance method that yields the spin-echo ...

Source: Stepišnik, Janez - Department of Physics, University of Ljubljana

Collection: Physics ; Materials Science

Summary:  #12;#12;ANALYSIS OF MOTION USING MAGNETIC FIELDS 327 lated gradient spin-echo (MGSE) NMR... the outcome of the MGSE NMR experiment. 111. Modulated Gradient Spin-Echo NMR In this section we derive... of the applied interaction. In the case of a spin echo, 2 takes the form of a natural time-ordered succession

Source: Stepišnik, Janez - Department of Physics, University of Ljubljana

Collection: Physics ; Materials Science

Summary:  . Use `Acc' to acquire data and use `Proc' for data process. Measuring T2 with the spin echo method... 1. Read section 2.1.5 and section 4.1 on spin echoes and the measurement of T2 free from artifacts... the beat frequency in the offresonance FID match the difference change in ...

Source: Braun, Paul - Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign

Collection: Materials Science

Summary:  requirements · Slice Selection · Gradient Echo and Spin Echo · Image Contrast #12;2 TT Liu BE280A, UCSD Fall... motions of spins. Not reversible. Due to static inhomogeneities. Reversible with a spin-echo sequence. #12... *) weighting TT Liu BE280A, UCSD Fall 2004 Spin Echo Discovered ...

Source: Liu, Thomas T. - Center for Functional MRI & Department of Radiology, University of California at San Diego

Collection: Biology and Medicine ; Engineering

Summary:  requirements · Slice Selection · Gradient Echo and Spin Echo · Image Contrast TT Liu BE280A, UCSD Fall 2004 MR... to random motions of spins. Not reversible. Due to static inhomogeneities. Reversible with a spin-echo... (-TE/T2 *) weighting TT Liu BE280A, UCSD Fall 2004 Spin Echo ...

Source: Liu, Thomas T. - Center for Functional MRI & Department of Radiology, University of California at San Diego

Collection: Biology and Medicine ; Engineering

Summary:  - like chemical shifts at physiological temperature. Low-temperature 13 C-31 P distances between... translocation of penetratin. For this purpose, we measured 13 C-31 P distances between several peptide side... associations ...

Source: Hong, Mei - Department of Chemistry, Iowa State University

Collection: Chemistry

Summary:  on the acquisition of k-space lines with different signal weighting, as in fast spin-echo (FSE) imaging... View Ordering in GRAPPA Fast Spin-Echo Methods A. Krishnan1 , Z. Li1 , A. Bilgin1,2 , M. I. Altbach... strategies for view ordering of the ACS lines a b c da b c d Fig. 2: Fast spin-echo images obtained ...

Source: Bilgin, Ali - Department of Electrical and Computer Engineering, University of Arizona

Collection: Engineering

Summary:  of the recovered electron-spin echo are shown for different initial phases, . The echo is of comparable intensity

Source: Petta, Jason - Department of Physics, Princeton University

Collection: Materials Science

Summary:  experiments, use the T/R birdcage head coil, spin echo spiral, and a single axial slice with slice thickness 5... you think accounts for these differences? (2 points) #12;

Source: California at San Diego, University of - Center for Functional MRI

Collection: Biology and Medicine

Summary:  experiments, use the T/R birdcage head coil, spin echo spiral, and a single axial slice with slice thickness 5... about the qualitative image quality for nl=1 vs nl=4? What do you think accounts for these differences

Source: California at San Diego, University of - Center for Functional MRI

Collection: Biology and Medicine

Summary:  only be analyzed in a qualitative manner. Recently, a radial fast spin-echo method has been developed... malignant from benign liver lesions [2,4]. An extension of the method is the radial Gradient and Spin-Echo... (GRASE) method, where several gradient echoes are collected within a spin-echo (SE) period [5

Source: Bilgin, Ali - Department of Electrical and Computer Engineering, University of Arizona

Collection: Engineering