Nuclear magnetic resonance imaging techniques as developed modestly within a university medical center environment: what can the small system contribute at this point?

abstract：:Increasing scientific interest in the zebrafish as a model organism across a range of biomedical and biological research areas raises the need for the development of in vivo imaging tools appropriate to this subject. Development of the embryonic and early stage forms of the subject can currently be assessed using opti...

journal_title：Magnetic resonance imaging

authors： Merrifield GD,Mullin J,Gallagher L,Tucker C,Jansen MA,Denvir M,Holmes WM

更新日期：2017-04-01 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：:We assessed the magnetic resonance (MR) imaging characteristics of two categories of epileptogenic substrates, neoplasms, and vascular malformations, to determine MR sensitivity and typical imaging features. A blinded retrospective analysis was performed on MR scans from 41 patients who had a neoplasm or vascular malf...

journal_title：Magnetic resonance imaging

authors： Bronen RA,Fulbright RK,Spencer DD,Spencer SS,Kim JH,Lange RC

更新日期：1995-01-01 00:00:00

abstract：:Superparamagnetic iron oxide particles (SPIOs) are usually referred to as T2 MR contrast agents, reducing signal intensity (SI) on T2-weighted MR images (negative enhancement). This study reports the original use of SPIOs as T1-enhancing contrast agents, primarily assessed in vitro, and then applied to an in vivo inve...

journal_title：Magnetic resonance imaging

authors： Canet E,Revel D,Forrat R,Baldy-Porcher C,de Lorgeril M,Sebbag L,Vallee JP,Didier D,Amiel M

更新日期：1993-01-01 00:00:00

abstract：:The presence of metallic compounds in facial cosmetics and permanent tattoos may affect the quality of magnetic resonance imaging. We report a case study describing a signal artifact due to the use of a leave-on powdered hair dye. On reviewing the ingredients of the product, it was found to contain several metallic co...

journal_title：Magnetic resonance imaging

authors： Chenji S,Wilman AH,Mah D,Seres P,Genge A,Kalra S

更新日期：2017-01-01 00:00:00

abstract：PURPOSE:To investigate right ventricular (RV) strain in patients without identified cardiac pathology using cardiac magnetic resonance tissue tracking (CMR TT). METHODS:A total of 50 consecutive patients with no identified cardiac pathology were analyzed. RV longitudinal and circumferential strain was assessed by CMR ...

journal_title：Magnetic resonance imaging

authors： Truong VT,Safdar KS,Kalra DK,Gao X,Ambach S,Taylor MD,Moore R,Taylor RJ,Germann J,Toro-Salazar O,Jefferies JL,Bartone C,Raman SV,Ngo T,Mazur W

更新日期：2017-05-01 00:00:00

abstract：:The magnetic resonance imaging (MRI) features of two cases of malignant lymphoproliferative disease involving skeletal muscle are presented. In both cases involved muscles were quantitatively and subjectively hypointense to fat on T1-weighted spin echo images, hypointense or isointense on T2-weighted spin echo images,...

journal_title：Magnetic resonance imaging

authors： Metzler JP,Fleckenstein JL,Vuitch F,Frenkel EP

更新日期：1992-01-01 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：:We have extended the utility of NMR as a technique to probe porous media structure over length scales of approximately 100-2000 microm by using the spin 1/2 noble gas 129Xe imbibed into the system's pore space. Such length scales are much greater than can be probed with NMR diffusion studies of water-saturated porous ...

journal_title：Magnetic resonance imaging

authors： Mair RW,Hürlimann MD,Sen PN,Schwartz LM,Patz S,Walsworth RL

更新日期：2001-04-01 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：: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：:In the breast carcinamas, sentinel lymph node biopsy (SLNB) attracts attention as technique to be settled by axillary lymph node metastasis, but existence of a false negative case is a problem. Equivalent cross relaxation rate image (ECRI) is the measurement method that we can evaluate a change of organization structu...

journal_title：Magnetic resonance imaging

authors： Matsushima S,Sasaki F,Sarumaru S,Ohta D,Era S,Sogami M,Inaba T,Kinosada Y

更新日期：2003-11-01 00:00:00

abstract：PURPOSE:To develop a technique for three dimensional (3D) high resolution joint imaging of intracranial and extracranial arterial walls with improved cerebrospinal fluid (CSF) suppression and good blood suppression based on T1 weighted sampling perfection with application optimized contrast using different angle evolut...

journal_title：Magnetic resonance imaging

authors： Zhang L,Zhang N,Wu J,Liu X,Chung YC

更新日期：2017-12-01 00:00:00

abstract：PURPOSE:To systematically investigate the scan-rescan, intra-observer, and inter-observer reproducibility of an improved DANTE-SPACE sequence for the simultaneous assessment of intra- and extracranial arterial vessel wall morphology. MATERIALS AND METHODS:Thirty-five healthy volunteers and 10 patients with atheroscler...

journal_title：Magnetic resonance imaging

authors： Wan L,Zhang N,Zhang L,Long X,Jia S,Li Y,Liang D,Zheng H,Liu X

更新日期：2019-10-01 00:00:00

abstract：:The HASTE (half-Fourier acquisition single-shot turbo spin-echo) technique delivers images with T2-weighting in about half a second and could be ideal for fast dynamic studies when T2-weighting is needed. We evaluated cardiac-triggered HASTE to study cervical spine flexion/extension. The cervical spines of ten asympto...

journal_title：Magnetic resonance imaging

authors： Duerinckx AJ,Yu WD,El-Saden S,Kim D,Wang JC,Sandhu HS

更新日期：1999-04-01 00:00:00

abstract：:New applications of the NMR-MOUSE (mobile universal surface explorer) to non-destructive quality control of elastomers are reported. One example concern the thermal aging of fast clutches which was probed by measurements of 1H transverse relaxation time. Novel methodological developments show that 1H double-quantum fi...

journal_title：Magnetic resonance imaging

authors： Kühn H,Klein M,Wiesmath A,Demco DE,Blümich B,Kelm J,Gold PW

更新日期：2001-04-01 00:00:00

abstract：:Susceptibility differences are common causes for artifacts in magnetic resonance (MR); therefore, it is important to choose phantom materials in a way that these artifacts are kept at a minimum. In this study, a previously proposed MR imaging (MRI) method [Beuf O, Briguet A, Lissac M, Davis R. Magnetic resonance imagi...

journal_title：Magnetic resonance imaging

authors： Carlsson A,Starck G,Ljungberg M,Ekholm S,Forssell-Aronsson E

更新日期：2006-11-01 00:00:00

abstract：:The effect of slice orientation on reproducibility and sensitivity of 3T fMRI activation using a motor task has been investigated in six normal volunteers. Four slice orientations were used; axial, oblique axial, coronal and sagittal. We applied analysis of variance (ANOVA) to suprathreshold voxel statistics to quanti...

journal_title：Magnetic resonance imaging

authors： Gustard S,Fadili J,Williams EJ,Hall LD,Carpenter TA,Brett M,Bullmore ET

更新日期：2001-12-01 00:00:00

abstract：:Truncation artifacts arise in magnetic resonance spectroscopic imaging (MRSI) of the human brain due to limited coverage of k-space necessitated by low SNR of metabolite signal and limited scanning time. In proton MRSI of the head, intense extra-cranial lipid signals "bleed" into brain regions, thereby contaminating s...

journal_title：Magnetic resonance imaging

authors： Sarkar S,Heberlein K,Hu X

更新日期：2002-12-01 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：: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：:Primary epiploic appendagitis (PEA) occurs secondary to inflammation of an epiploic appendage, and is considered to be a rare cause of acute abdomen. In this case report, we describe the magnetic resonance imaging (MRI) findings of PEA correlated with computed tomographic (CT) findings. MRI findings included an oval s...

journal_title：Magnetic resonance imaging

authors： Sirvanci M,Balci NC,Karaman K,Duran C,Karakaş E

更新日期：2002-01-01 00:00:00

abstract：PURPOSE:To develop a RF coil system for joint imaging of intracranial and extracranial arterial vessel wall at 3T. MATERIALS AND METHOD:The coil system consists of a 24-channel head coil combined with an 8-channel carotid coil. It is compared with a standard coil configuration (12-channel head coil+4-channel neck coil...

journal_title：Magnetic resonance imaging

authors： Hu X,Li Y,Zhang L,Zhang X,Liu X,Chung YC

更新日期：2017-02-01 00:00:00

abstract：:The general aims of functional brain magnetic resonance imaging (fMRI) studies are to ascertain which areas of the brain are activated during a specific task, the extent of this activation, whether different groups of subjects demonstrate different patterns of activation, and how these groups behave in different tasks...

journal_title：Magnetic resonance imaging

authors： Constable RT,Skudlarski P,Mencl E,Pugh KR,Fulbright RK,Lacadie C,Shaywitz SE,Shaywitz BA

更新日期：1998-04-01 00:00:00

abstract：:The dependence of BOLD signal change (BSC) on baseline hematocrit is in the process of being characterized, primarily using conventional Gradient Echo (GE) echo planar imaging (EPI). We describe the first empiric exploration of this relationship using, in addition to GE, Spin Echo (SE) and two Asymmetric Spin Echo EPI...

journal_title：Magnetic resonance imaging

authors： Gustard S,Williams EJ,Hall LD,Pickard JD,Carpenter TA

更新日期：2003-07-01 00:00:00

abstract：PURPOSE:The purpose was to study the effect of estrogen deficiency on contrast agent diffusion into intervertebral disc in a rat model. MATERIALS AND METHODS:Seven-month-old female Sprague-Dawley rats were used. Fourteen rats had ovariectomy, and nine rats had sham surgery. Magnetic resonance imaging (MRI) of sagittal...

journal_title：Magnetic resonance imaging

authors： Deng M,Griffith JF,Zhu XM,Poon WS,Ahuja AT,Wang YX

更新日期：2012-06-01 00:00:00

abstract：:The spin-echo nuclear magnetic resonance (NMR) technique together with paramagnetic ion doping are used to study structural parameters of plant samples, such as restricted dimensions, and cell interconnection both through membranes and by cell contact by studying simultaneous restricted diffusion and intercellular wat...

journal_title：Magnetic resonance imaging

authors： Anisimov AV,Sorokina NY,Dautova NR

更新日期：1998-06-01 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：PURPOSE:While PRESS is often employed to measure glutamate concentrations, MEGA-PRESS enables simultaneous Glx (glutamate and glutamine) and GABA measurements. This study aimed to compare validation, repeatability, and concordance of different approaches for glutamate quantification at 3T to aid future studies in their...

journal_title：Magnetic resonance imaging

authors： van Veenendaal TM,Backes WH,van Bussel FCG,Edden RAE,Puts NAJ,Aldenkamp AP,Jansen JFA

更新日期：2018-05-01 00:00:00

abstract：:Postero-anterior radiographs and magnetic resonance imaging (MRI) of the chest were performed in nine biopsy proven cases of sarcoidosis. MRI was more sensitive than a postero-anterior chest roentgenogram in detecting hilar and mediastinal adenopathy but less informative in detecting pleural and parenchymal disease. ...

journal_title：Magnetic resonance imaging

authors： Craig DA,Colletti PM,Ratto D,Gordonson JS,Raval JK,Sharma OP

更新日期：1988-09-01 00:00:00