Multinuclear NMR investigations of probe construction materials at 4.7 T.


:Since background signal from NMR probes can overwhelm the signal from a sample, the NMR analysis of plastics or machinable ceramics is a prerequisite to their use in probe implementations. The contributions from a variety of materials to proton, fluorine, and carbon NMR spectra are presented.


Magn Reson Med


Babcock EE,Vaughan JT,Lesan B,Nunnally RL




Has Abstract


1990-03-01 00:00:00












  • Automatic vessel removal in gliomas from dynamic susceptibility contrast imaging.

    abstract::The presence of macroscopic vessels within the tumor region is a potential confounding factor in MR-based dynamic susceptibility contrast (DSC)-enhanced glioma grading. In order to distinguish between such vessels and the elevated cerebral blood volume (CBV) of brain tumors, we propose a vessel segmentation technique ...

    journal_title:Magnetic resonance in medicine

    pub_type: 杂志文章


    authors: Emblem KE,Due-Tonnessen P,Hald JK,Bjornerud A

    更新日期:2009-05-01 00:00:00

  • Selection and evaluation of optimal two-dimensional CAIPIRINHA kernels applied to time-resolved three-dimensional CE-MRA.

    abstract:PURPOSE:To develop and validate a method for choosing the optimal two-dimensional CAIPIRINHA kernel for subtraction contrast-enhanced MR angiography (CE-MRA) and estimate the degree of image quality improvement versus that of some reference acceleration parameter set at R ≥ 8. METHODS:A metric based on patient-specifi...

    journal_title:Magnetic resonance in medicine

    pub_type: 杂志文章


    authors: Weavers PT,Borisch EA,Riederer SJ

    更新日期:2015-06-01 00:00:00

  • Counter rotating current local coils for high-resolution magnetic resonance imaging.

    abstract::A type of local coil (or surface coil) for magnetic resonance imaging and spectroscopy is described in which two circular loops of the same diameter are disposed axially with respect to each other and in which counter rotating currents (CRC) are supported in the two loops. This type of coil has been used for localized...

    journal_title:Magnetic resonance in medicine

    pub_type: 杂志文章


    authors: Froncisz W,Jesmanowicz A,Kneeland JB,Hyde JS

    更新日期:1986-08-01 00:00:00

  • Single-shot localized echo-planar imaging (STEAM-EPI) at 4.7 tesla.

    abstract::The resolution and homogeneity limitations of echo-planar imaging (EPI) are overcome by zoom imaging of an easily shimmed localized volume. Use of the stimulated echo enables single-shot localization. In vivo 0.5-mm resolution EPI images of selected regions of a cat brain at 4.7 T are presented. ...

    journal_title:Magnetic resonance in medicine

    pub_type: 杂志文章


    authors: Turner R,von Kienlin M,Moonen CT,van Zijl PC

    更新日期:1990-05-01 00:00:00

  • CEST, ASL, and magnetization transfer contrast: How similar pulse sequences detect different phenomena.

    abstract::Chemical exchange saturation transfer (CEST), arterial spin labeling (ASL), and magnetization transfer contrast (MTC) methods generate different contrasts for MRI. However, they share many similarities in terms of pulse sequences and mechanistic principles. They all use RF pulse preparation schemes to label the longit...

    journal_title:Magnetic resonance in medicine

    pub_type: 杂志文章,评审


    authors: Knutsson L,Xu J,Ahlgren A,van Zijl PCM

    更新日期:2018-10-01 00:00:00

  • Maximum entropy and 2DFT NMR images.

    abstract::A comparison between contrast and signal-to-noise ratio (SNR), as obtained by both maximum entropy (ME) and 2DFT reconstruction, is reported for NMR images. Our results show that in the ME elaboration the contrast and SNR are generally increased with respect to the 2DFT elaboration. The magnitude of such an increase d...

    journal_title:Magnetic resonance in medicine

    pub_type: 杂志文章


    authors: De Simone BC,De Luca F,Maraviglia B

    更新日期:1988-11-01 00:00:00

  • Absolute quantification of myocardial perfusion under adenosine stress.

    abstract::The prebolus technique allows one to quantify perfusion in the human heart with a low variability by means of MRI. In this study the prebolus technique was used to determine quantitative perfusion values in the human heart under adenosine stress and to measure the myocardial perfusion reserve (MPR). Twelve healthy vol...

    journal_title:Magnetic resonance in medicine

    pub_type: 杂志文章


    authors: Ritter C,Brackertz A,Sandstede J,Beer M,Hahn D,Köstler H

    更新日期:2006-10-01 00:00:00

  • Passive tracking of catheters and guidewires by contrast-enhanced MR fluoroscopy.

    abstract::Passive MR tracking of catheters and guidewires is usually done by dynamically imaging a single thick slab, subtracting a baseline image, and combining the result with a previously acquired MR angiogram. In the in vitro and in vivo experiments reported here, it is demonstrated that this approach may be greatly simplif...

    journal_title:Magnetic resonance in medicine

    pub_type: 杂志文章


    authors: Bakker CJ,Bos C,Weinmann HJ

    更新日期:2001-01-01 00:00:00

  • Spectral baseline correction using CLEAN.

    abstract::Baseline distortion in NMR spectroscopy, caused by the "dead time" between signal excitation and detection, makes quantitative interpretation difficult and is aesthetically displeasing. Here the use of the CLEAN algorithm for deconvolving the effect of signal dead time to produce a distortionless baseline is discussed...

    journal_title:Magnetic resonance in medicine

    pub_type: 杂志文章


    authors: McKinnon GC,Burger C,Boesiger P

    更新日期:1990-01-01 00:00:00

  • Contributions of chemical exchange to T1ρ dispersion in a tissue model.

    abstract::Variations in T(1ρ) with locking-field strength (T(1ρ) dispersion) may be used to estimate proton exchange rates. We developed a novel approach utilizing the second derivative of the dispersion curve to measure exchange in a model system of cross-linked polyacrylamide gels. These gels were varied in relative compositi...

    journal_title:Magnetic resonance in medicine

    pub_type: 杂志文章


    authors: Cobb JG,Xie J,Gore JC

    更新日期:2011-12-01 00:00:00

  • ΔR2 (*) gadolinium-diethylenetriaminepentacetic acid relaxivity in venous blood.

    abstract::The accuracy of perfusion measurements using dynamic, susceptibility-weighted, contrast-enhanced MRI depends on estimating contrast agent concentration in an artery, i.e., the arterial input function. One of the difficulties associated with obtaining an arterial input function are partial volume effects when both bloo...

    journal_title:Magnetic resonance in medicine

    pub_type: 杂志文章


    authors: Patil V,Johnson G

    更新日期:2013-04-01 00:00:00

  • Stability constants and 1H relaxation effects of ternary complexes formed between Gd-DTPA, Gd-DTPA-BMA, Gd-DOTA, and Gd-EDTA and citrate, phosphate, and carbonate ions.

    abstract::Formation of ternary complexes between Gd-DTPA, Gd-DTPA-BMA, and Gd-DOTA, used as contrast enhancement agents in MRI and the endogenously available carbonate and phosphate ions, has been demonstrated. The extent of ternary complex formation and its effect on the proton relaxation, measured at 9 MHz, rates is negligibl...

    journal_title:Magnetic resonance in medicine

    pub_type: 杂志文章


    authors: Burai L,Hietapelto V,Király R,Tóth E,Brücher E

    更新日期:1997-07-01 00:00:00

  • The use of band-selectable digital filtering in magnetic resonance image enhancement.

    abstract::Manipulation of the data describing two-dimensional magnetic resonance (MR) images can be used to zoom an image, decrease image noise and artifacts by modeling, or emphasize object edges in the field of view. In this paper, a two-dimensional band-selectable digital filtering (2D-BSDF) technique is detailed. This can b...

    journal_title:Magnetic resonance in medicine

    pub_type: 杂志文章


    authors: Mitchell DK,Nichols ST,Smith MR,Scott K

    更新日期:1989-03-01 00:00:00

  • Functional magnetic resonance imaging in real time (FIRE): sliding-window correlation analysis and reference-vector optimization.

    abstract::New algorithms for correlation analysis are presented that allow the mapping of brain activity from functional MRI (fMRI) data in real time during the ongoing scan. They combine the computation of the correlation coefficients between measured fMRI time-series data and a reference vector with "detrending", a technique ...

    journal_title:Magnetic resonance in medicine

    pub_type: 杂志文章


    authors: Gembris D,Taylor JG,Schor S,Frings W,Suter D,Posse S

    更新日期:2000-02-01 00:00:00

  • Identification of different lipid phases and calcium phosphate deposits in human carotid artery plaques by MAS NMR spectroscopy.

    abstract::Accumulation of lipids in atherosclerotic plaques causes progressive narrowing of the arterial lumen, often followed by thrombosis and ischemia. Currently several different methods, most requiring disruption of the plaque, are used to study the physical properties of lipids accumulated in plaques, and lipid compositio...

    journal_title:Magnetic resonance in medicine

    pub_type: 杂志文章


    authors: Guo W,Morrisett JD,Lawrie GM,DeBakey ME,Hamilton JA

    更新日期:1998-02-01 00:00:00

  • RF heating measurement using MR thermometry and field monitoring: Methodological considerations and first in vivo results.

    abstract:PURPOSE:A MR thermometry (MRT) method with field monitoring is proposed to improve the measurement of small temperature variations induced in brain MRI exams. METHODS:MR thermometry experiments were performed at 7 Tesla with concurrent field monitoring and RF heating. Images were reconstructed with nominal k-space tra...

    journal_title:Magnetic resonance in medicine

    pub_type: 杂志文章


    authors: Le Ster C,Mauconduit F,Mirkes C,Bottlaender M,Boumezbeur F,Djemai B,Vignaud A,Boulant N

    更新日期:2021-03-01 00:00:00

  • Clinical prostate T2 quantification using magnetization-prepared spiral imaging.

    abstract::T(2) quantification may augment diagnostic T(2)-weighted imaging; to improve cancer detection via auto-segmentation of multi-parametric acquisitions and to potentiate longitudinal studies of prostate cancer. However, robust quantitative techniques are not generally accessible or refined for clinical translation. This ...

    journal_title:Magnetic resonance in medicine

    pub_type: 杂志文章


    authors: Foltz WD,Chopra S,Chung P,Bayley A,Catton C,Jaffray D,Wright GA,Haider MA,Ménard C

    更新日期:2010-10-01 00:00:00

  • Analysis of the evolution of focal cerebral ischemia in the rat using the eigenimage filter.

    abstract::The eigenimage filter was used to evaluate the results of a MRI study of cerebral ischemia in a rat model. This linear filter segments a desired feature in an image sequence from other features which may interfere with its observation. The animals were imaged temporally, after occlusion of the middle cerebral artery, ...

    journal_title:Magnetic resonance in medicine

    pub_type: 杂志文章


    authors: Peck DJ,Spickler EM,Knight RA,Hearshen DO,Windham JP

    更新日期:1992-08-01 00:00:00

  • Detection of liver fibrosis with magnetic cross-relaxation.

    abstract::The utility of MRI using magnetization transfer (MT) enhanced pulse sequences to diagnose hepatic cirrhosis in a rat model was investigated. Hepatic T1 was measured with and without MT off-resonance RF pulses in 17 treated and six control rats. The livers were evaluated histologically, and the hydroxyproline content q...

    journal_title:Magnetic resonance in medicine

    pub_type: 杂志文章


    authors: Aisen AM,Doi K,Swanson SD

    更新日期:1994-05-01 00:00:00

  • Manganese-enhanced magnetic resonance imaging of mouse brain after systemic administration of MnCl2: dose-dependent and temporal evolution of T1 contrast.

    abstract::Manganese is a useful contrast agent for MRI of animals. Previously, it has been shown that systemic doses of MnCl(2) provide unique contrast in the rodent brain, enabling visualization of neuroarchitecture. The present work investigates the dose and temporal dependence of brain enhancement after i.v. administration o...

    journal_title:Magnetic resonance in medicine

    pub_type: 杂志文章


    authors: Lee JH,Silva AC,Merkle H,Koretsky AP

    更新日期:2005-03-01 00:00:00

  • Non-contrast-enhanced flow-independent peripheral MR angiography with balanced SSFP.

    abstract::Flow-independent angiography is a non-contrast-enhanced technique that can generate vessel contrast even with reduced blood flow in the lower extremities. A method is presented for producing these angiograms with magnetization-prepared balanced steady-state free precession (bSSFP). Because bSSFP yields bright fat sign...

    journal_title:Magnetic resonance in medicine

    pub_type: 杂志文章


    authors: Cukur T,Lee JH,Bangerter NK,Hargreaves BA,Nishimura DG

    更新日期:2009-06-01 00:00:00

  • Decomposition of inflow and blood oxygen level-dependent (BOLD) effects with dual-echo spiral gradient-recalled echo (GRE) fMRI.

    abstract::Image contrast with gradient-recalled echo sequences (GRE) used for fMRI can have both blood oxygen level-dependent (BOLD) and inflow components, and the latter is often undesirable. A dual-echo technique can be used to differentiate these mechanisms, because modulation of signal from inflow is common to both echoes, ...

    journal_title:Magnetic resonance in medicine

    pub_type: 杂志文章


    authors: Glover GH,Lemieux SK,Drangova M,Pauly JM

    更新日期:1996-03-01 00:00:00

  • Experimental confirmation of phase encoding of instantaneous derivatives of position.

    abstract::Previous theoretical reports described the dependence of interpretation of the observed phase of the NMR signal on the time origin(s) of moment calculations and position's Taylor series expansion. This work provides experimental confirmation of predictions derived from that theory. For accelerative motion, experimenta...

    journal_title:Magnetic resonance in medicine

    pub_type: 杂志文章


    authors: Duerk JL,Simonetti OP,Hurst GC,Finelli DA

    更新日期:1994-07-01 00:00:00

  • Characterization of pseudo-continuous arterial spin labeling: Simulations and experimental validation.

    abstract:PURPOSE:To characterize pseudo-continuous arterial spin labeling (pCASL) through simulations of spin inversion and to discuss suitable parameter settings for measuring cerebral perfusion. METHODS:Simulations of arterial spin inversion in pCASL were performed based on the Bloch equation. Both the labeling and the contr...

    journal_title:Magnetic resonance in medicine

    pub_type: 杂志文章


    authors: Lorenz K,Mildner T,Schlumm T,Möller HE

    更新日期:2018-03-01 00:00:00

  • Contrast-enhanced MRI of brown adipose tissue after pharmacological stimulation.

    abstract::A non-invasive method for studying the modifications induced in lipid depots by hormonal stimulation could extend knowledge of adipose tissues. We studied the effect of adrenergic stimulation on interscapular brown adipose tissue (IBAT) of rats using contrast-enhanced MRI. Controls and rats pre-treated with adrenaline...

    journal_title:Magnetic resonance in medicine

    pub_type: 杂志文章


    authors: Sbarbati A,Cavallini I,Marzola P,Nicolato E,Osculati F

    更新日期:2006-04-01 00:00:00

  • Local specific absorption rate in brain tumors at 7 tesla.

    abstract:PURPOSE:MR safety at 7 Tesla relies on accurate numerical simulations of transmit electromagnetic fields to fully assess local specific absorption rate (SAR) safety. Numerical simulations for SAR safety are currently performed using models of healthy patients. These simulations might not be useful for estimating SAR in...

    journal_title:Magnetic resonance in medicine

    pub_type: 杂志文章


    authors: Restivo MC,van den Berg CA,van Lier AL,Polders DL,Raaijmakers AJ,Luijten PR,Hoogduin H

    更新日期:2016-01-01 00:00:00

  • In vivo measurement of T2 distributions and water contents in normal human brain.

    abstract::Using a 32-echo imaging pulse sequence, T2 relaxation decay curves were acquired from five white- and six gray-matter brain structures outlined in 12 normal volunteers. The water contents of white and gray matter were 0.71 (0.01) and 0.83 (0.03) g/ml, respectively. All white-matter structures had significantly higher ...

    journal_title:Magnetic resonance in medicine

    pub_type: 杂志文章


    authors: Whittall KP,MacKay AL,Graeb DA,Nugent RA,Li DK,Paty DW

    更新日期:1997-01-01 00:00:00

  • Increased anatomical detail by in vitro MR microscopy with a modified Golgi impregnation method.

    abstract::Golgi impregnation is unique in its ability to display the dendritic trees and axons of large numbers of individual neurons by histology. Here we apply magnetic resonance microscopy to visualize the neuroanatomy of animal models by combining histologic fixation chemistry with paramagnetic contrast agents. Although the...

    journal_title:Magnetic resonance in medicine

    pub_type: 杂志文章


    authors: Zhang X,Bearer EL,Perles-Barbacaru AT,Jacobs RE

    更新日期:2010-05-01 00:00:00

  • Characterization of aortic root atherosclerosis in ApoE knockout mice: high-resolution in vivo and ex vivo MRM with histological correlation.

    abstract::In vivo, cardiac-gated, black-blood, and ex vivo magnetic resonance microscopy (MRM) images of the aortic root, and histopathology data were obtained from 12 transgenic and wild-type (WT) mice. MRM was performed using a black-blood imaging spin-echo sequence with upstream and downstream in-flow saturation pulses to ob...

    journal_title:Magnetic resonance in medicine

    pub_type: 杂志文章


    authors: Itskovich VV,Choudhury RP,Aguinaldo JG,Fallon JT,Omerhodzic S,Fisher EA,Fayad ZA

    更新日期:2003-02-01 00:00:00

  • Potential degradation in image quality due to selective averaging of phase-encoding lines in Fourier transform MRI.

    abstract::The properties of the image noise for selective averaging of phase-encoding lines have been investigated. For a given acquisition time, selective averaging results in a signal-to-noise ratio penalty compared to averaging all lines equally. In addition, selective averaging yields a non uniform distribution of noise cha...

    journal_title:Magnetic resonance in medicine

    pub_type: 杂志文章


    authors: Mugler JP 3rd

    更新日期:1991-05-01 00:00:00