Brain glioma growth model using reaction-diffusion equation with viscous stress tensor on brain MR images.

abstract：:The extent of reaction of 153Gd-radiolabeled Gd(L) chelates with 25 mM CO23- (25 mF), PO34-, Zn2+ and Cu2+ at pH 7 was determined for L = EDTA, DTPA, DOTA, HP-DO3A, and DO3A. Gd(EDTA)- and Gd(DTPA)2- reacted (greater than 20% in 10 min) with Cu2+ and Zn2+ in the presence of PO34-. These double replacement reactions yi...

journal_title：Magnetic resonance imaging

authors： Tweedle MF,Hagan JJ,Kumar K,Mantha S,Chang CA

更新日期：1991-01-01 00:00:00

abstract：:Neurovascular coupling describes the cascade between neuronal activity and subsequent Blood-Oxygenation-Level-Dependent (BOLD) signal increase. Based on this premise, the correlation of this BOLD signal increase with a particular task, such as finger-tapping, is used to map neuronal activation. This signal increase ma...

journal_title：Magnetic resonance imaging

authors： van Niftrik CHB,Piccirelli M,Bozinov O,Maldaner N,Strittmatter C,Pangalu A,Valavanis A,Regli L,Fierstra J

更新日期：2018-06-01 00:00:00

abstract：:The midcalf muscles of eight patients who had peripheral arterial occlusive disease were evaluated by exercise MRI before and after bypass surgery or percutaneous transluminal angioplasty. MRI showed a high intensity of these muscles, especially the posterior muscles, after exercise in all patients before intervention...

journal_title：Magnetic resonance imaging

authors： Yoshioka H,Anno I,Kuramoto K,Matsumoto K,Jikuya T,Itai Y

更新日期：1995-01-01 00:00:00

abstract：:Dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) is often used to examine vascular function in malignant tumors and noninvasively monitor drug efficacy of antivascular therapies in clinical studies. However, complex numerical methods used to derive tumor physiological properties from DCE-MRI images can b...

journal_title：Magnetic resonance imaging

authors： Hsu YH,Ferl GZ,Ng CM

更新日期：2013-05-01 00:00:00

abstract：:We have developed an in vivo longitudinally detected ESR (LODESR) imaging system operating at 700 MHz based on a loop-gap resonator and a pair of saddle-type pickup coils. A good linear relationship between the LODESR signal intensity and the applied power in a range up to 15.8 W was obtained. The detection of LODESR ...

journal_title：Magnetic resonance imaging

authors： Yokoyama H,Sato T,Tsuchihashi N,Ogata T,Ohya-Nishiguchi H,Kamada H

更新日期：1997-01-01 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：:The purpose of this study is to estimate the precision or statistical variability of the velocity measurements computed from MRI phase-contrast. From the analytical probability density function (PDF) of the phase in the signal we obtain the PDF of the velocity by means of an auto-convolution. This PDF allows the estim...

journal_title：Magnetic resonance imaging

authors： Irarrazaval P,Dehghan Firoozabadi A,Uribe S,Tejos C,Sing-Long C

更新日期：2019-11-01 00:00:00

abstract：:In vivo proton and phosphorus magnetic resonance spectroscopy (MRS) studies were performed at 1.5 T on two patients (siblings) diagnosed as having a mitochondrial cytopathy. The clinical diagnosis was based on a complete battery of biochemical tests, electron microscopy and modified Gomori trichrome stain studies of m...

journal_title：Magnetic resonance imaging

authors： Narayana PA,Slopis JM,Jackson EF,Hazle JD,Kulkarni MV,Butler IJ

更新日期：1989-03-01 00:00:00

abstract：:The results of a magnetic resonance spin-spin relaxation analysis and broad-line magnetic resonance imaging (MRI) (gradient-echo and stray-field imaging) study of water and water transport in Portland cement pastes are presented. The effect of varying the cure conditions and the water to cement (w/c) ratio of the samp...

journal_title：Magnetic resonance imaging

authors： Bohris AJ,Goerke U,McDonald PJ,Mulheron M,Newling B,Le Page B

更新日期：1998-06-01 00:00:00

abstract：:With the aim of developing a fast algorithm for high-quality MRI reconstruction from undersampled k-space data, we propose a novel deep neural Network, which is inspired by Iterative Shrinkage Thresholding Algorithm with Data consistency (NISTAD). NISTAD consists of three consecutive blocks: an encoding block, which m...

journal_title：Magnetic resonance imaging

authors： Qiu W,Li D,Jin X,Liu F,Sun B

更新日期：2020-07-01 00:00:00

abstract：:In this study, in order to differentiate cavernous hemangioma and hepatic metastases, rapid acquisition relaxation enhanced (RARE) sequence was used. First, in vivo measurements of T1, T2 relaxation times and proton density were obtained using T1, T2 calculation protocol (TOMIKON S50, 0.5T) and multipoint techniques. ...

journal_title：Magnetic resonance imaging

authors： Jafari F,Nayeri N,Tahsini M,Khodadoust AA

更新日期：1999-06-01 00:00:00

abstract：:Our purpose was to investigate three-dimensional (3D) gadolinium-enhanced magnetic resonance angiography (Gd-MRA) in the evaluation of renal transplant arteries. Eleven MR angiography examinations were performed in nine renal transplant patients. Gd-MRA, three-dimensional phase contrast (3D-PC) post-gadolinium, and tw...

journal_title：Magnetic resonance imaging

authors： Johnson DB,Lerner CA,Prince MR,Kazanjian SN,Narasimham DL,Leichtman AB,Cho KJ

更新日期：1997-01-01 00:00:00

abstract：:We have applied diffusion and relaxation Nuclear Magnetic Resonance experiments to investigate the translational and rotational mobility of adsorbents on quartz and calcite mineral surfaces. On both surfaces it was found that water is the dominant molecule. On the quartz surface the majority of water molecules have a ...

journal_title：Magnetic resonance imaging

authors： Sørgård HN,Totland C,Nerdal W,Seland JG

更新日期：2019-02-01 00:00:00

abstract：:In vivo temporal EPR imaging was conducted on the brain of rats that received one of two kinds of blood-brain barrier-permeable nitroxide radicals via the tail vein-one is a water-soluble 3-hydroxymethyl-2,2,5,5-tetramethylpyrrolidine-1-oxyl (hydroxymethyl-PROXYL); and the other is a non-water-soluble 3-methoxycarbony...

journal_title：Magnetic resonance imaging

authors： Yokoyama H,Itoh O,Aoyama M,Obara H,Ohya H,Kamada H

更新日期：2002-04-01 00:00:00

abstract：:Functional magnetic resonance imaging (fMRI) has found widespread clinical interest. Difficulties in clinical use of the fMRI technique arise, considering the lack of knowledge about activation task performance. This accounts especially for sensorimotor activation studies, in which performance of the sensorimotor acti...

journal_title：Magnetic resonance imaging

authors： Baudendistel K,Schad LR,Wenz F,Essig M,Schröder J,Jahn T,Knopp MV,Lorenz WJ

更新日期：1996-01-01 00:00:00

abstract：:The purpose of this study was to correlate the MRI features of the anal canal with histologic findings. T1- and T2-weighted MR images of nine anal canals were obtained after fixation in 10% formalin. In three specimens, imaging was repeated after removal of histologic layers with a dissecting microscope. Corresponding...

journal_title：Magnetic resonance imaging

authors： Van Beers BE,Kartheuser A,Delos MA,Grandin C,Detry R,Jamart J,Pringot J

更新日期：1996-01-01 00:00:00

abstract：:Water content is the dominant chemical compound in the brain and it is the primary determinant of tissue contrast in magnetic resonance (MR) images. Water content varies greatly between individuals, and it changes dramatically over time from birth through senescence of the human life span. We hypothesize that the effe...

journal_title：Magnetic resonance imaging

authors： Bansal R,Hao X,Liu F,Xu D,Liu J,Peterson BS

更新日期：2013-12-01 00:00:00

abstract：:The fluorine nuclear magnetic resonance spin-lattice relaxation rate (1/T1) of the perfluorochemical blood substitute perfluorotripropylamine (FTPA) is very sensitive to oxygen tension. This presents the possibility of measuring blood oxygen tension by 19F MR imaging. We obtained oxygen-sensitive 19F NMR images of the...

journal_title：Magnetic resonance imaging

authors： Fishman JE,Joseph PM,Floyd TF,Mukherji B,Sloviter HA

更新日期：1987-01-01 00:00:00

abstract：:Pelvic MR (41 patients) and CT (36 patients) examinations were performed on 14 females with a primary pelvic complaint, and on 28 females with a suspicion of local recurrent disease of gynecologic malignant tumor. Benign cystic tumors were found in eight patients, five patients had endometriomas, one had a lymphoma, a...

journal_title：Magnetic resonance imaging

authors： Varpula M

更新日期：1993-01-01 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：:The sensitivity of multiple diffusion MRI (dMRI) parameters to longitudinal changes in white matter microstructure was investigated for the 3xTg-AD transgenic mouse model of Alzheimer's disease, which manifests both amyloid beta plaques and neurofibrillary tangles. By employing a specific dMRI method known as diffusio...

journal_title：Magnetic resonance imaging

authors： Nie X,Falangola MF,Ward R,McKinnon ET,Helpern JA,Nietert PJ,Jensen JH

更新日期：2019-04-01 00:00:00

abstract：:In this work an interleaved multiple-gradient-echo chemical shift imaging (IMGE-CSI) technique was designed, implemented and evaluated at 1.5 and 4T for high-resolution lipid quantification and R(2)* measurement in-vivo. The method is analogous to echo planar CSI but utilizes conventional gradient echoes, exploiting t...

journal_title：Magnetic resonance imaging

authors： Hilaire L,Wehrli FW,Song HK

更新日期：2000-09-01 00:00:00

abstract：:The phase difference method of phase contrast MR angiography provides a means of measuring the average velocity in each voxel of an MR scan. When static tissue is present in a voxel containing flow, the measured velocity is not the average velocity of the flow alone, but is lower due to the partial volume effect of th...

journal_title：Magnetic resonance imaging

authors： Hamilton CA

更新日期：1994-01-01 00:00:00

abstract：:The functional value of TurboFLASH MR imaging in the assessment of dynamic contrast enhancement and renal perfusion anomalies was evaluated in seven patients, who also underwent renal scintigraphy in baseline conditions. The basal renograms obtained from MAG-3 scintigraphy (mercapto acetyl triglycine, MAG3-S) and from...

journal_title：Magnetic resonance imaging

authors： Laissy JP,Faraggi M,Lebtahi R,Soyer P,Brillet G,Méry JP,Menu Y,Le Guludec D

更新日期：1994-01-01 00:00:00

abstract：:Idiopathic dilatation of the pulmonary artery (IDPA) is a rare congenital disease which is usually detected fortuitously on chest x-ray, thus radiologists must be aware of this clinical entity. This report describes four cases to which Magnetic Resonance Imaging (MRI) played a major role in diagnosing IDPA and in dete...

journal_title：Magnetic resonance imaging

authors： Ugolini P,Mousseaux E,Sadou Y,Sidi D,Mercier LA,Paquet E,Gaux JC

更新日期：1999-07-01 00:00:00

abstract：:Fifteen patients with liver cirrhosis and two control groups were examined. The first control group consisted of 7 healthy volunteers, and the second group of 17 patients with nonfocal liver diseases. The T1 and T2 relaxation times were calculated from signal intensities read out from a region of interest centrally lo...

journal_title：Magnetic resonance imaging

authors： Thomsen C,Christoffersen P,Henriksen O,Juhl E

更新日期：1990-01-01 00:00:00

abstract：:Gels consist of crosslinked polymer network swollen in solvent. The network of flexible long-chain molecules traps the liquid medium they are immersed in. Some gels undergo abrupt volume change, a phase transition process, by swelling-shrinking in response to external stimuli changes in solvent composition, temperatur...

journal_title：Magnetic resonance imaging

authors： Yung KT

更新日期：2003-02-01 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：:Compressed sensing has shown great potential in reducing data acquisition time in magnetic resonance imaging (MRI). In traditional compressed sensing MRI methods, an image is reconstructed by enforcing its sparse representation with respect to a preconstructed basis or dictionary. In this paper, patch-based directiona...

journal_title：Magnetic resonance imaging

authors： Qu X,Guo D,Ning B,Hou Y,Lin Y,Cai S,Chen Z

更新日期：2012-09-01 00:00:00

abstract：BACKGROUND:Ultra-high spatial resolution imaging of whole, ex vivo brains provides new opportunities to understand neurological disease. Recent work has demonstrated that 100 μm isotropic resolution can reveal anatomical details that are otherwise difficult to appreciate, but relied on fabrication facilities, fabricati...

journal_title：Magnetic resonance imaging

authors： Kim S,Sakaie K,Blümcke I,Jones S,Lowe MJ

更新日期：2021-02-01 00:00:00