abstract：:Diffusion tensor imaging (DTI) was used to investigate the involvement of brain white matter in Williams syndrome (WS), a genetic neurodevelopmental disorder. Whole-brain DTIs were obtained from 16 young adults with WS and 16 normal controls. A voxel-based analysis was performed to compare fractional anisotropy (FA) v...

journal_title：Magnetic resonance imaging

authors： Arlinghaus LR,Thornton-Wells TA,Dykens EM,Anderson AW

更新日期：2011-11-01 00:00:00

abstract：:The misunderstanding of the labeling for an "MR conditional" respiratory ventilator system resulted in the placement of this device, which had substantial ferromagnetic components, too close to a 3-T magnetic resonance (MR) system, causing a projectile incident. Magnetic resonance imaging health care professionals sho...

journal_title：Magnetic resonance imaging

authors： Greenberg KL,Weinreb J,Shellock FG

更新日期：2011-10-01 00:00:00

abstract：:Positive contrast imaging methods produce enhanced signal at large magnetic field gradient in magnetic resonance imaging. Several postprocessing algorithms, such as susceptibility gradient mapping and phase gradient mapping methods, have been applied for positive contrast generation to detect the cells targeted by sup...

journal_title：Magnetic resonance imaging

authors： Zhu H,Demachi K,Sekino M

更新日期：2011-09-01 00:00:00

abstract：:Magnetic resonance imaging (MRI) has played an important role in the diagnosis and management of cancer since it was first developed, but other modalities also continue to advance and provide complementary information on the status of tumors. In the future, there will be a major continuing role for noninvasive imaging...

journal_title：Magnetic resonance imaging

authors： Gore JC,Manning HC,Quarles CC,Waddell KW,Yankeelov TE

更新日期：2011-06-01 00:00:00

abstract：:Dysfunction of the corticolimbic circuitry has been highlighted in social anxiety disorder (SAD) during social stimuli. However, few studies have investigated functional connectivity in SAD during the resting state, which may improve our understanding of SAD pathophysiology. The aim of this study was to investigate wh...

journal_title：Magnetic resonance imaging

authors： Ding J,Chen H,Qiu C,Liao W,Warwick JM,Duan X,Zhang W,Gong Q

更新日期：2011-06-01 00:00:00

abstract：:When assessing liver iron content using relaxometry, an average relaxation rate (R1, R2 or R2*) is usually determined from a region of interest or the entire liver. This is commonly performed by fitting the signal decay in individual voxels to an appropriate relaxation function. The voxel-level parameters resulting fr...

journal_title：Magnetic resonance imaging

authors： Marro K,Otto R,Kolokythas O,Shimamura A,Sanders JE,McDonald GB,Friedman SD

更新日期：2011-05-01 00:00:00

abstract：:Budd-Chiari syndrome (BCS) is a rare disorder caused by the obstruction of hepatic venous outflow, leading to sinusoidal congestion, ischemic injury to liver cells and portal hypertension. Long-term survival largely depends on whether hepatocellular carcinoma occurs. A recently available liver-specific contrast medium...

journal_title：Magnetic resonance imaging

authors： Kitajima K,Yoshikawa T,Seo Y,Ohno Y,Yano Y,Miki A,Kanda T,Kanata N,Azuma T,Sugimura K

更新日期：2011-05-01 00:00:00

abstract：:Use of conjugated equine estrogens (CEE) has been linked to smaller regional brain volumes in women aged ≥65 years; however, it is unknown whether this results in a broad-based characteristic pattern of effects. Structural magnetic resonance imaging was used to assess regional volumes of normal tissue and ischemic les...

journal_title：Magnetic resonance imaging

authors： Casanova R,Espeland MA,Goveas JS,Davatzikos C,Gaussoin SA,Maldjian JA,Brunner RL,Kuller LH,Johnson KC,Mysiw WJ,Wagner B,Resnick SM,Women's Health Initiative Memory Study.

更新日期：2011-05-01 00:00:00

abstract：:There is increasing interest in imaging short T2 species which show little or no signal with conventional magnetic resonance (MR) pulse sequences. In this paper, we describe the use of three-dimensional ultrashort echo time (3D UTE) sequences with TEs down to 8 μs for imaging of these species. Image contrast was gener...

journal_title：Magnetic resonance imaging

authors： Du J,Bydder M,Takahashi AM,Carl M,Chung CB,Bydder GM

更新日期：2011-05-01 00:00:00

abstract：PURPOSE:A direct correlation between T(1ρ), T(2) and quantified proteoglycan and collagen contents in human osteoarthritic cartilage has yet to be documented. We aimed to investigate the orientation effect on T(1ρ) and T(2) values in human osteoarthritic cartilage and to quantify the correlation between T(1ρ), T(2) vs....

journal_title：Magnetic resonance imaging

authors： Li X,Cheng J,Lin K,Saadat E,Bolbos RI,Jobke B,Ries MD,Horvai A,Link TM,Majumdar S

更新日期：2011-04-01 00:00:00

abstract：:The apparent diffusion coefficient (ADC) measured using magnetic resonance imaging methods provides information on microstructural properties of biological tissues, and thus has found applications as a useful biomarker for assessing changes such as those that occur in ischemic stroke and cancer. Conventional pulsed gr...

journal_title：Magnetic resonance imaging

authors： Xu J,Does MD,Gore JC

更新日期：2011-04-01 00:00:00

abstract：:Super paramagnetic iron oxide Fe(3)O(4) nanoparticles prepared via photochemical reaction in pure form were used for inducing hyperthermia to treat subcutaneous Ehrlich carcinoma implanted in female mice. Our results indicate that the mean temperature profiles at the rectum, periphery of the tumor surface and at the c...

journal_title：Magnetic resonance imaging

authors： Elsherbini AA,Saber M,Aggag M,El-Shahawy A,Shokier HA

更新日期：2011-02-01 00:00:00

abstract：:Perceptions of sensation and pain in healthy people are believed to be the net result of sensory input and descending modulation from brainstem and cortical regions depending on emotional and cognitive factors. Here, the influence of attention on neural activity in the spinal cord during thermal sensory stimulation of...

journal_title：Magnetic resonance imaging

authors： Stroman PW,Coe BC,Munoz DP

更新日期：2011-01-01 00:00:00

abstract：PURPOSE:To evaluate the clinical outcomes of conservative management by observation with MRI of patients with branch-duct intraductal papillary mucinous neoplasms (BD-IPMNs). MATERIALS AND METHODS:Twenty-three consecutive patients, who were followed up by MRI with magnetic resonance cholangiopancreatography (MRCP) ove...

journal_title：Magnetic resonance imaging

authors： Shin SS,Armao DM,Shah M,Kim YH,Lee CH,Rubinas T,Brubaker LM,Semelka RC

更新日期：2010-12-01 00:00:00

abstract：:Magnetic resonance elastography (MRE) uses a phase-contrast MRI technique to image shear wave propagation in tissue followed by the mathematical inversion of the equations of motion governing tissue mechanics to noninvasively image tissue stiffness. This work investigates the impact of various MR sampling strategies d...

journal_title：Magnetic resonance imaging

authors： Murphy MC,Glaser KJ,Manduca A,Felmlee JP,Huston J 3rd,Ehman RL

更新日期：2010-12-01 00:00:00

abstract：:Diffusion tensor magnetic resonance imaging (DTI) is useful for studying the microstructural changes in the spinal cord following traumatic injury; however, image quality is generally poor due to the small size of the spinal cord, physiological motion and susceptibility artifacts. Self-navigated, interleaved, variable...

journal_title：Magnetic resonance imaging

authors： Ellingson BM,Sulaiman O,Kurpad SN

更新日期：2010-11-01 00:00:00

abstract：PURPOSE:This study was done to test a series of MR sequences for evaluating the sciatic nerve after total hip arthroplasty (THA). MATERIAL AND METHODS:The study protocol was approved by the institutional review board. Informed consent was obtained from all patients. Twenty-five patients (11 men and 14 women mean age: ...

journal_title：Magnetic resonance imaging

authors： Tagliafico A,Podestà A,Assini A,Boccacini L,Serafini G,Calabrese M,Martinoli C

更新日期：2010-11-01 00:00:00

abstract：BACKGROUND AND PURPOSE:The widespread propagation of synchronized neuronal firing in seizure disorders may affect cortical and subcortical brain regions. Diffusion tensor imaging (DTI) can noninvasively quantify white matter integrity. The purpose of this study was to investigate the abnormal changes of white matter in...

journal_title：Magnetic resonance imaging

authors： Meng L,Xiang J,Kotecha R,Rose D,Zhao H,Zhao D,Yang J,Degrauw T

更新日期：2010-11-01 00:00:00

abstract：:Functional magnetic resonance imaging (fMRI) based on the so-called blood oxygen level-dependent (BOLD) contrast is a powerful tool for studying brain function not only locally but also on the large scale. Most studies assume a simple relationship between neural and BOLD activity, in spite of the fact that it is impor...

journal_title：Magnetic resonance imaging

authors： Murayama Y,Biessmann F,Meinecke FC,Müller KR,Augath M,Oeltermann A,Logothetis NK

更新日期：2010-10-01 00:00:00

abstract：:High signal-to-noise ratios (SNR) are essential for high-resolution anatomical and functional MRI. Phased arrays are advantageous for this but have the drawback that they often have inflexible and bulky configurations. Particularly in experiments where functional MRI is combined with simultaneous electrophysiology, sp...

journal_title：Magnetic resonance imaging

authors： Goense J,Logothetis NK,Merkle H

更新日期：2010-10-01 00:00:00

abstract：:Flattened representations are a useful approach to represent the convoluted complex surface of the neocortex of primates and other large-brained mammals. In this study, we compared the flattened representation of neocortical areas obtained from the recently published MRI and histology atlas of the rhesus monkey brain ...

journal_title：Magnetic resonance imaging

authors： Sultan F,Hamodeh S,Murayama Y,Saleem KS,Logothetis N

更新日期：2010-10-01 00:00:00

abstract：:Liver fibrosis determines the functional liver reserve. Several studies have reported that the apparent diffusion coefficient (ADC) values of diffusion-weighted magnetic resonance imaging (DW-MRI) can assess liver fibrosis. We investigated whether DW-MRI predicts postoperative hepatic insufficiency and liver fibrosis ...

journal_title：Magnetic resonance imaging

authors： Kim SU,Kim YC,Choi JS,Kim KS,Choi GH,Choi JS,Park JY,Kim DY,Ahn SH,Choi EH,Park YN,Chon CY,Han KH,Kim MJ

更新日期：2010-07-01 00:00:00

abstract：:Spiral acquisition schemes offer unique advantages such as flow compensation, efficient k-space sampling and robustness against motion that make this option a viable choice among other non-Cartesian sampling schemes. For this reason, the main applications of spiral imaging lie in dynamic magnetic resonance imaging suc...

journal_title：Magnetic resonance imaging

authors： Delattre BM,Heidemann RM,Crowe LA,Vallée JP,Hyacinthe JN

更新日期：2010-07-01 00:00:00

abstract：:Constrained energy minimization (CEM) has proven highly effective for hyperspectral (or multispectral) target detection and classification. It requires a complete knowledge of the desired target signature in images. This work presents "Unsupervised CEM (UCEM)," a novel approach to automatically target detection and cl...

journal_title：Magnetic resonance imaging

authors： Lin GC,Wang CM,Wang WJ,Sun SY

更新日期：2010-06-01 00:00:00

abstract：:One of the main problems with rapid magnetic resonance imaging (MRI) techniques is the artifacts that result from off-resonance effects. The proposed off-resonance frequency filtered MRI (OFF-MRI) method focuses on the elimination of off-resonance components from the image of the observed object. To maintain imaging s...

journal_title：Magnetic resonance imaging

authors： Medic J,Tomazic S

更新日期：2010-05-01 00:00:00

abstract：PURPOSE:To develop a method for estimating metabolite concentrations using phased-array coils and sensitivity-encoded (SENSE) magnetic resonance spectroscopic images (MRSI) of the human brain. MATERIALS AND METHODS:The method is based on the phantom replacement technique and uses receive coil sensitivity maps and body...

journal_title：Magnetic resonance imaging

authors： Bonekamp D,Smith MA,Zhu H,Barker PB

更新日期：2010-04-01 00:00:00

abstract：:A magnetic resonance imaging cardiac magnetic susceptometry (MRI-CS) technique for assessing cardiac tissue iron concentration based on phase mapping was developed. Normal control subjects (n=9) and thalassemia patients (n=13) receiving long-term blood transfusion therapy underwent MRI-CS and MRI measurements of the c...

journal_title：Magnetic resonance imaging

authors： Wang ZJ,Fischer R,Chu Z,Mahoney DH Jr,Mueller BU,Muthupillai R,James EB,Krishnamurthy R,Chung T,Padua E,Vichinsky E,Harmatz P

更新日期：2010-04-01 00:00:00

abstract：:Magnetic field inhomogeneities like eddy current-related gradient fields cause geometric distortions in echo-planar imaging (EPI). This in particular affects diffusion-weighted imaging where these distortions vary with the direction of the diffusion weighting and hamper the accurate determination of diffusion paramete...

journal_title：Magnetic resonance imaging

authors： Finsterbusch J

更新日期：2010-04-01 00:00:00

abstract：:Multisite quantitative magnetic resonance imaging (qMRI) of volume requires a small isotropic point spread-function (PSF) that is spatially, temporarily, and platform invariant. A phantom which will allow rapid assessment of this metric throughout the imaged volume without repositioning will assist certification of im...

journal_title：Magnetic resonance imaging

authors： Moon SY,Hornak JP

更新日期：2010-02-01 00:00:00

abstract：:Blood oxygenation level-dependent (BOLD) functional magnetic resonance imaging (fMRI) is currently the dominant technique for non-invasive investigation of brain functions. One of the challenges with BOLD fMRI, particularly at high fields, is compensation for the effects of spatiotemporally varying magnetic field inho...

journal_title：Magnetic resonance imaging

authors： Barry RL,Williams JM,Klassen LM,Gallivan JP,Culham JC,Menon RS

更新日期：2010-02-01 00:00:00

abstract：:High-resolution, single-slice, high spatial and spectral resolution (HiSS) breast magnetic resonance imaging (MRI) provides improved lesion conspicuity, margin definition and internal definition, as compared to conventional clinical MRI - and thus may provide better lesion characterization and increase breast MRI spec...

journal_title：Magnetic resonance imaging

authors： Medved M,Newstead GM,Abe H,Olopade OI,Shimauchi A,Zamora MA,Karczmar GS

更新日期：2010-01-01 00:00:00

abstract：:The aim of this study was to evaluate intracranial arterial stenoses and aneurysms with accelerated time-resolved three-dimensional (3D) phase-contrast MRI or 4D flow. The 4D flow technique was utilized to image four normal volunteers, two patients with intracranial stenoses and two patients with intracranial aneurysm...

journal_title：Magnetic resonance imaging

authors： Hope TA,Hope MD,Purcell DD,von Morze C,Vigneron DB,Alley MT,Dillon WP

更新日期：2010-01-01 00:00:00

abstract：:Noise estimation is a challenging task in magnetic resonance imaging (MRI), with applications in quality assessment, filtering or diffusion tensor estimation. Main noise estimators based on the Rician model are revisited and classified in this article, and new useful methods are proposed. Additionally, all the surveye...

journal_title：Magnetic resonance imaging

authors： Aja-Fernández S,Tristán-Vega A,Alberola-López C

更新日期：2009-12-01 00:00:00

abstract：:Functional magnetic resonance imaging (fMRI) research has shown that brain arteriovenous malformations (AVMs) lead to reorganization of cortical motor areas. Since it is known that blood oxygenation level-dependent signal in fMRI may be influenced by the hemodynamic perturbation associated with the presence of the AVM...

journal_title：Magnetic resonance imaging

authors： Caramia F,Francia A,Mainero C,Tinelli E,Palmieri MG,Colonnese C,Bozzao L,Caramia MD

更新日期：2009-12-01 00:00:00

abstract：:It is often desirable to separate voxels that contain signal from tissue along with measurement noise from those that contain purely measurement noise. Generally, this separation called thresholding utilizes only the magnitude portion of the images. Recently, methods have been developed that utilize both the magnitude...

journal_title：Magnetic resonance imaging

authors： Rowe DB,Haacke EM

更新日期：2009-11-01 00:00:00

abstract：:Signal fluctuations in functional magnetic resonance imaging (fMRI) can result from a number of sources that may have a neuronal, physiologic or instrumental origin. To determine the relative contribution of these sources, we recorded physiological (respiration and cardiac) signals simultaneously with fMRI in human vo...

journal_title：Magnetic resonance imaging

authors： Bianciardi M,Fukunaga M,van Gelderen P,Horovitz SG,de Zwart JA,Shmueli K,Duyn JH

更新日期：2009-10-01 00:00:00

abstract：:Despite intense research on the blood oxygenation level-dependent (BOLD) signal underlying functional magnetic resonance imaging, our understanding of its physiological basis is far from complete. In this study, it was investigated whether the so-called poststimulus BOLD signal undershoot is solely a passive vascular ...

journal_title：Magnetic resonance imaging

authors： Sadaghiani S,Uğurbil K,Uludağ K

更新日期：2009-10-01 00:00:00

abstract：:Peripancreatic fluid collections are among the common post pancreas transplant complications, which are mainly due to leakage from the anastomosis site to bowel and graft pancreatitis. Differentiation between these two entities is important because they are treated differently. In this case, secretin stimulated magnet...

journal_title：Magnetic resonance imaging

authors： Alkaade S,Fattahi R,Balci NC,Akduman EI,Garvin PJ,Modanlou KA,Burton FR

更新日期：2009-09-01 00:00:00

abstract：PURPOSE:To investigate the alterations in water-fat (W-F) ratio of the normal breast tissue of female volunteers as a function of the histological phases of the menstrual cycle. METHODS:Image-guided volume localized in vivo proton ((1)H) magnetic resonance spectroscopy (MRS) at 1.5 T was carried out in the para-areola...

journal_title：Magnetic resonance imaging

authors： Sharma U,Kumar M,Sah RG,Jagannathan NR

更新日期：2009-07-01 00:00:00

abstract：:Magnetic resonance (MR) microscopy of up to 1-5-microm resolutions have been reported previously. The tested phantom structures, however, had widths one order of magnitude bigger than the reported resolutions, e.g., spherical beads or capillary tubes of tens-of-micron diameters or wall thicknesses have been imaged. In...

journal_title：Magnetic resonance imaging

authors： Lee SC,Kim K,Kim J,Yi JH,Lee S,Cheong C

更新日期：2009-07-01 00:00:00