abstract：:The mapping of the human brain white matter fiber networks relative to deep subcortical and cortical gray matter requires high spatial resolution which is challenged by the low signal-to-noise ratio. The purpose of this short report was to introduce a whole brain high spatial resolution diffusion tensor imaging (DTI) ...

journal_title：Magnetic resonance imaging

authors： Hasan KM,Kamali A,Kramer LA

更新日期：2009-06-01 00:00:00

abstract：:Collagen fibers in tendons and entheses are highly ordered. The protons within the bound water are subject to dipolar interactions whose strength depends on the orientation of the fibers to the static magnetic field B(0). Clinical pulse sequences have been employed to investigate this magic angle effect of the Achille...

journal_title：Magnetic resonance imaging

authors： Du J,Pak BC,Znamirowski R,Statum S,Takahashi A,Chung CB,Bydder GM

更新日期：2009-05-01 00:00:00

abstract：:Susceptibility-weighted imaging (SWI) is a valuable technique for high-resolution imaging of brain vasculature that greatly benefits from the emergence of higher field strength MR scanners. Autocalibrating partially parallel imaging techniques can be employed to reduce lengthy acquisition times as long as the decrease...

journal_title：Magnetic resonance imaging

authors： Lupo JM,Banerjee S,Hammond KE,Kelley DA,Xu D,Chang SM,Vigneron DB,Majumdar S,Nelson SJ

更新日期：2009-05-01 00:00:00

abstract：:The nonhuman primate brain study provides important supplemental means for human brain exploration since the two species share close anatomical and functional similarities. MR diffusion tensor imaging (DTI) in human brain has revealed exquisite details of brain structures especially in the brain white matter. However,...

journal_title：Magnetic resonance imaging

authors： Liu X,Zhu T,Gu T,Zhong J

更新日期：2009-04-01 00:00:00

abstract：:A single injection of high-dose steroid (20 mg/kg) has been reported to induce necrotic lesions in the proximal metaphysis and diaphysis of the rabbit femur. In the rabbit osteonecrosis (ON) model induced by two-dose horse serum injections, contrast-enhanced magnetic resonance imaging (MRI) and T2*-weighted dynamic MR...

journal_title：Magnetic resonance imaging

authors： Takao M,Sugano N,Nishii T,Sakai T,Nakamura N,Yoshikawa H

更新日期：2009-02-01 00:00:00

abstract：:A regularization strategy is described for generalized autocalibrating partially parallel acquisition (GRAPPA) that allows successful calibration using a small number of autocalibration signals (ACS). The approach requires certain nonlinear relationships between the GRAPPA coefficients to be satisfied, which increases...

journal_title：Magnetic resonance imaging

authors： Bydder M,Jung Y

更新日期：2009-01-01 00:00:00

abstract：:Most modern techniques for functional magnetic resonance imaging (fMRI) rely on blood-oxygen-level-dependent (BOLD) contrast as the basic principle for detecting neuronal activation. However, the measured BOLD effect depends on a transfer function related to neurophysiological changes accompanying electrical neural ac...

journal_title：Magnetic resonance imaging

authors： Casciaro S,Bianco R,Distante A

更新日期：2008-11-01 00:00:00

abstract：:In pharmacological magnetic resonance imaging (phMRI) with anesthetized animals, there is usually only a single time window to observe the dynamic signal change to an acute drug administration since subsequent drug injections are likely to result in altered response properties (e.g., tolerance). Unlike the block-desig...

journal_title：Magnetic resonance imaging

authors： Lu H,Yang S,Zuo Y,Demny S,Stein EA,Yang Y

更新日期：2008-11-01 00:00:00

abstract：:Parallel excitation using multiple transmit channels has emerged as an effective method to shorten multidimensional spatially selective radiofrequency (RF) pulses, which have a number of important applications, including B1 field inhomogeneity correction in high-field MRI. The specific absorption rate (SAR) is a prima...

journal_title：Magnetic resonance imaging

authors： Liu Y,Feng K,McDougall MP,Wright SM,Ji J

更新日期：2008-10-01 00:00:00

abstract：:Interventions for peripheral arterial disease should be designed to treat a physiological rather than an anatomic defect. Thus, for vascular surgeons, functional information about stenoses is as important as the anatomic one. In case of finding a stenosis by the use of magnetic resonance angiography, it would be a mat...

journal_title：Magnetic resonance imaging

authors： Mühlthaler H,Quatember B,Fraedrich G,Mühlthaler M,Pfeifer B,Greiner A,Schocke MF

更新日期：2008-10-01 00:00:00

abstract：:It has previously been observed that during isometric dorsiflexion exercise, the time course of T2-weighted signal intensity (SI) changes is spatially heterogeneous. The purpose of this study was to test the hypothesis that this spatial heterogeneity would increase at higher contraction intensities. Eight subjects per...

journal_title：Magnetic resonance imaging

authors： Damon BM,Wadington MC,Lansdown DA,Hornberger JL

更新日期：2008-10-01 00:00:00

abstract：:The hippocampal formation is a brain system that is implicated in learning and memory. The major input to the hippocampus arrives from the entorhinal cortex (EC) to the dentate gyrus (DG) through the perforant path. In the present work, we have investigated the functional properties of this connection by concomitantly...

journal_title：Magnetic resonance imaging

authors： Canals S,Beyerlein M,Murayama Y,Logothetis NK

更新日期：2008-09-01 00:00:00

abstract：OBJECTIVE:To test if three-dimensional (3D) cine spatial frequency-temporal frequency Broad-use Linear Acquisition Speed-up Technique (k-t BLAST) is suitable for rapid evaluation of global and regional left ventricular (LV) functional parameters and to evaluate the influence of gadolinium administration. MATERIALS AND...

journal_title：Magnetic resonance imaging

authors： Huber S,Muthupillai R,Mojibian H,Cheong B,Kouwenhoven M,Flamm SD

更新日期：2008-07-01 00:00:00

abstract：:Functional magnetic resonance imaging (fMRI) of the cortex is a powerful tool for neuroscience research, and its use has been extended into the brainstem and spinal cord as well. However, there are significant technical challenges with extrapolating the developments that have been achieved in the cortex to their use i...

journal_title：Magnetic resonance imaging

authors： Stroman PW,Figley CR,Cahill CM

更新日期：2008-07-01 00:00:00

abstract：:The anticancer effect of thiacarpine, a synthetic analogue of the known cytotoxic alkaloid polycarpine isolated from the Pacific ascidian Polycarpa aurata, was investigated in vivo in experiments using mouse solid Ehrlich carcinoma tumor as the target. A high-resolution magnetic resonance imaging (MRI) technique using...

journal_title：Magnetic resonance imaging

authors： Agafonova IG,Radchenko OS,Novikov VL,Aminin DL,Stonik VA

更新日期：2008-07-01 00:00:00

abstract：:The analysis of functional magnetic resonance imaging (fMRI) data involves multiple stages of data pre-processing before the activation can be statistically detected. Spatial smoothing is a very common pre-processing step in the analysis of functional brain imaging data. This study presents a broad perspective on the ...

journal_title：Magnetic resonance imaging

authors： Mikl M,Marecek R,Hlustík P,Pavlicová M,Drastich A,Chlebus P,Brázdil M,Krupa P

更新日期：2008-05-01 00:00:00

abstract：:We report a geographic area of prominent hypointensity in T2-weighted images vs. normal adjacent liver parenchyma in a patient with cholangiocarcinoma and lymphangitic metastasis of the liver after superparamagnetic iron oxide (SPIO) administration. The area showing this prominent signal drop showed Kupffer cell proli...

journal_title：Magnetic resonance imaging

authors： Lee Y,Lee JS,Kim CM,Jeong JY,Choi JI,Kim MJ

更新日期：2008-05-01 00:00:00

abstract：PURPOSE:To evaluate the feasibility of an optimized bright blood MRI protocol at 3 T in combination with contrast agent administration for the detection and characterization of aortic high-risk plaques for the improved workup of acute stroke patients. MATERIALS AND METHODS:ECG synchronized T1-weighted 3D gradient echo...

journal_title：Magnetic resonance imaging

authors： Markl M,Dudler P,Fydrychowicz A,Strecker C,Weiller C,Hennig J,Harloff A

更新日期：2008-04-01 00:00:00

abstract：:Arterial spin labeling (ASL) perfusion fMRI data differ in important respects from the more familiar blood oxygen level-dependent (BOLD) fMRI data and require specific processing strategies. In this paper, we examined several factors that may influence ASL data analysis, including data storage bit resolution, motion c...

journal_title：Magnetic resonance imaging

authors： Wang Z,Aguirre GK,Rao H,Wang J,Fernández-Seara MA,Childress AR,Detre JA

更新日期：2008-02-01 00:00:00

abstract：PURPOSE:The purpose of this study was to determine the pre- and postpubertal 1H magnetic resonance spectroscopic characteristics of the normal testis to establish baseline values for further clinical studies. MATERIALS AND METHODS:The subjects consisted of male volunteers, of whom 19 were prepubertal with ages between...

journal_title：Magnetic resonance imaging

authors： Firat AK,Uğraş M,Karakaş HM,Erdem G,Kurus M,Ugras M,Celik T,Kahraman B,Doğanay S

更新日期：2008-02-01 00:00:00

abstract：:Tumor aggressiveness and response to therapy are influenced by the extravascular extracellular space fraction (EESF) of the malignant tissue. The EESF may, therefore, be an important prognostic parameter for cancer patients. The aim of this study was to investigate whether gadopentetate dimeglumine (Gd-DTPA)-based dyn...

journal_title：Magnetic resonance imaging

authors： Benjaminsen IC,Brurberg KG,Ruud EB,Rofstad EK

更新日期：2008-02-01 00:00:00

abstract：OBJECTIVES:The objectives of this study were to develop protocols that measure abdominal fat and calf muscle lipids with magnetic resonance imaging (MRI) and magnetic resonance spectroscopy (MRS), respectively, at 3 T and to examine the correlation between these parameters and insulin sensitivity. MATERIALS AND METHOD...

journal_title：Magnetic resonance imaging

authors： Li X,Youngren JF,Hyun B,Sakkas GK,Mulligan K,Majumdar S,Masharani UB,Schambelan M,Goldfine ID

更新日期：2008-02-01 00:00:00

abstract：:Brain asymmetry is a phenomenon well known for handedness and has been studied in motor cortices. However, few quantitative studies on asymmetrical cortical activity in motor areas have been conducted. In this study, we systematically investigated asymmetrical cortical activity in motor areas during sequential finger ...

journal_title：Magnetic resonance imaging

authors： Zeng L,Chen H,Ouyang L,Yao D,Gao JH

更新日期：2007-12-01 00:00:00

abstract：:Magnetic field gradients play a fundamental role in MR imaging and localized spectroscopy. The MRI experiment, in particular fast MRI, relies on precise gradient switching, which has become more demanding with the constantly growing number of fast imaging techniques. Here we present a simple MR method to measure the b...

journal_title：Magnetic resonance imaging

authors： Latta P,Gruwel ML,Volotovskyy V,Weber MH,Tomanek B

更新日期：2007-11-01 00:00:00

abstract：:Lipomatous tumors of the uterus are unusual, benign neoplasms seen in postmenopausal women. Although many of the mixed-type cases such as lipoleiomyoma and fibrolipoma have been reported, pure uterine lipomas are extremely rare. In the literature, a few cases with pure uterine lipoma have been reported. We first prese...

journal_title：Magnetic resonance imaging

authors： Erdem G,Celik O,Karakas HM,Alkan A,Hascalik S

更新日期：2007-10-01 00:00:00

abstract：:Due to the presence of artifacts induced by fast-imaging acquisition in functional magnetic resonance imaging (fMRI) studies, it is very difficult to estimate the variance of thermal noise by traditional methods in magnitude images. Moreover, the existence of incidental phase fluctuations impairs the validity of curre...

journal_title：Magnetic resonance imaging

authors： Xu Y,Wu G,Rowe DB,Ma Y,Zhang R,Xu G,Li SJ

更新日期：2007-09-01 00:00:00

abstract：:Magnetic resonance spectroscopy (MRS) is ideally suited for physiology-neurochemistry experiments with the living brain and particularly for studies on the primary visual cortex (striate cortex or area V1). Yet, the highly convoluted form of the human V1 has thus far prevented the performance of MRS investigations tha...

journal_title：Magnetic resonance imaging

authors： Juchem C,Logothetis NK,Pfeuffer J

更新日期：2007-07-01 00:00:00

abstract：:Functional MR imaging of the alert, behaving monkey is being used more and more often to detect activation patterns and guide electrophysiological research investigating the neural basis of behavior. Several labs have reported fMRI data from the awake monkey, but none of them has studied and systematically corrected t...

journal_title：Magnetic resonance imaging

authors： Pfeuffer J,Shmuel A,Keliris GA,Steudel T,Merkle H,Logothetis NK

更新日期：2007-07-01 00:00:00

abstract：:We recently directly examined the relationship between blood-oxygen-level-dependent (BOLD) functional magnetic resonance imaging (fMRI) signals and neural activity by simultaneously acquiring electrophysiological and fMRI data from monkeys in a 4.7-T vertical scanner (Logothetis NK, Pauls J, Augath MA, Trinath T, Oelt...

journal_title：Magnetic resonance imaging

authors： Oeltermann A,Augath MA,Logothetis NK

更新日期：2007-07-01 00:00:00

abstract：:Measurements have been carried out in six subjects at magnetic fields of 1.5, 3 and 7 T, with the aim of characterizing the variation of T2* with field strength in human brain. Accurate measurement of T2* in the presence of macroscopic magnetic field inhomogeneity is problematic due to signal decay resulting from thro...

journal_title：Magnetic resonance imaging

authors： Peters AM,Brookes MJ,Hoogenraad FG,Gowland PA,Francis ST,Morris PG,Bowtell R

更新日期：2007-07-01 00:00:00

abstract：:Recently, we have demonstrated that the fine-digit topography (millimeter sized) previously identified in the primary somatosensory cortex (SI), using electrophysiology and intrinsic signal optical imaging, can also be mapped with submillimeter resolution using blood-oxygenation-level-dependent (BOLD) functional magne...

journal_title：Magnetic resonance imaging

authors： Zhang N,Gore JC,Chen LM,Avison MJ

更新日期：2007-07-01 00:00:00

abstract：:Tissue water molecules reside in different biophysical compartments. For example, water molecules in the vasculature reside for variable periods of time within arteries, arterioles, capillaries, venuoles and veins, and may be within blood cells or blood plasma. Water molecules outside of the vasculature, in the extrav...

journal_title：Magnetic resonance imaging

authors： Mulkern RV,Haker SJ,Maier SE

更新日期：2007-07-01 00:00:00

abstract：:Two parallel imaging methods used for first-pass myocardial perfusion imaging were compared in terms of signal-to-noise ratio (SNR), contrast-to-noise ratio (CNR) and image artifacts. One used adaptive Time-adaptive SENSitivity Encoding (TSENSE) and the other used GeneRalized Autocalibrating Partially Parallel Acquisi...

journal_title：Magnetic resonance imaging

authors： Irwan R,Lubbers DD,van der Vleuten PA,Kappert P,Götte MJ,Sijens PE

更新日期：2007-06-01 00:00:00

abstract：:The purpose of this study was to test whether an empirical mathematical model (EMM) of dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) can distinguish between benign and malignant breast lesions. A modified clinical protocol was used to improve the sampling of contrast medium uptake and washout. T(1)-we...

journal_title：Magnetic resonance imaging

authors： Fan X,Medved M,Karczmar GS,Yang C,Foxley S,Arkani S,Recant W,Zamora MA,Abe H,Newstead GM

更新日期：2007-06-01 00:00:00

abstract：:We present a novel approach to the nuclear magnetic resonance (NMR) and magnetic resonance imaging (MRI) analysis of complex samples with nontrivial distribution of longitudinal relaxation rate R(1). Parametrically enabled relaxation filters with double and multiple inversion (PERFIDI) aim to separate signals arising ...

journal_title：Magnetic resonance imaging

authors： Sykora S,Bortollotti V,Fantazzini P

更新日期：2007-05-01 00:00:00

abstract：:The chain dynamics of short-chain perfluoropolyether melts confined in Vycor nanoporous media has been characterized by field cycling nuclear magnetic resonance relaxometry and the dipolar correlation effect. The slowdown of motions under confinement, leading to larger residual dipolar couplings, has been probed by lo...

journal_title：Magnetic resonance imaging

authors： Kausik R,Fatkullin N,Hüsing N,Kimmich R

更新日期：2007-05-01 00:00:00

abstract：:Laplace inversion has been widely used in analyzing nuclear magnetic resonance data to obtain a spectrum of decay time constant, such as the T(2) spectrum. However, due to the ill-conditioned nature of such inversion, it is difficult to determine the reliability and error of the resulting spectrum. This article descri...

journal_title：Magnetic resonance imaging

authors： Song YQ

更新日期：2007-05-01 00:00:00

abstract：:Trabecular bone structure and bone density contribute to the strength of bone and are important in the study of osteoporosis. Wavelets are a powerful tool in characterizing and quantifying texture in an image. The purpose of this study was to validate wavelets as a tool in computing trabecular bone thickness directly ...

journal_title：Magnetic resonance imaging

authors： Krug R,Carballido-Gamio J,Burghardt AJ,Haase S,Sedat JW,Moss WC,Majumdar S

更新日期：2007-04-01 00:00:00

abstract：:Dynamic contrast-enhanced MRI (DCE-MRI) was used to noninvasively evaluate the effects of AG-03736, a novel inhibitor of vascular endothelial growth factor (VEGF) receptor tyrosine kinases, on tumor microvasculature in a breast cancer model. First, a dose response study was undertaken to determine the responsiveness o...

journal_title：Magnetic resonance imaging

authors： Wilmes LJ,Pallavicini MG,Fleming LM,Gibbs J,Wang D,Li KL,Partridge SC,Henry RG,Shalinsky DR,Hu-Lowe D,Park JW,McShane TM,Lu Y,Brasch RC,Hylton NM

更新日期：2007-04-01 00:00:00

abstract：:We describe a lesion with the magnetic resonance imaging (MRI) characteristics of a glioblastoma mutiforme and demonstrate how perfusion MRI and proton MR spectroscopic imaging can be used to differentiate necrotizing cerebritis from what appeared to be a high-grade glioma. A 43-year-old woman presented to her physici...

journal_title：Magnetic resonance imaging

authors： Pivawer G,Law M,Zagzag D

更新日期：2007-02-01 00:00:00