Visualisation of changes in regional cerebral blood flow (rCBF) produced by ketamine using long TE gradient-echo sequences: preliminary results.

abstract：PURPOSE:This study aimed to further investigate the effects of agmatine on brain edema in the rats with middle cerebral artery occlusion (MCAO) injury using magnetic resonance imaging (MRI) monitoring and biochemical and histopathologic evaluation. MATERIALS AND METHODS:Following surgical induction of MCAO for 90min, ...

journal_title：Magnetic resonance imaging

authors： Huang YC,Tzeng WS,Wang CC,Cheng BC,Chang YK,Chen HH,Lin PC,Huang TY,Chuang TJ,Lin JW,Chang CP

更新日期：2013-09-01 00:00:00

abstract：OBJECTIVE:The purpose of this study was to analyze flow patterns in the pulmonary circulation of healthy volunteers by using 4D flow magnetic resonance imaging. MATERIALS AND METHODS:The study was approved by the local ethics committee and all subjects gave written informed consent. Eighteen volunteers underwent a 4D ...

journal_title：Magnetic resonance imaging

authors： Bächler P,Pinochet N,Sotelo J,Crelier G,Irarrazaval P,Tejos C,Uribe S

更新日期：2013-02-01 00:00:00

abstract：:In magnetic resonance elastography (MRE), shear waves at a certain frequency are encoded through bipolar gradients that switch polarity at a controlled encoding frequency and are offset in time to capture wave propagation using a controlled sampling frequency. In brain MRE, there is a possibility that the mechanical a...

journal_title：Magnetic resonance imaging

authors： Johnson CL,Chen DD,Olivero WC,Sutton BP,Georgiadis JG

更新日期：2012-02-01 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：BACKGROUND:The molecular structure, charge, thermodynamic and kinetic stability are approximately the same for gadodiamide and gadoversetamide, the main substantive difference is that gadodiamide is manufactured with 5% free ligand to form Omniscan® and gadoversetamide with 10% free ligand to form OptiMARK®. PURPOSE:T...

journal_title：Magnetic resonance imaging

authors： Semelka RC,Prybylski JP,Ramalho M

更新日期：2019-05-01 00:00:00

abstract：:This paper presents a data-driven method for the reconstruction and visualisation of curvilinear slices from three-dimensional (3D) magnetic resonance (MR) scans of the head. Visualisation of curvilinear slices, rather than standard planar slices, produces symmetrical views of the cortex and allows small abnormalities...

journal_title：Magnetic resonance imaging

authors： Musse O,Armspach JP,Namer IJ,Heitz F,Hennel F,Grucker D

更新日期：1998-12-01 00:00:00

abstract：:The purpose of this study is to report the significant differences found in the identification of lesions in cervical spinal cord of two patients with multiple sclerosis when using the BLADE T2-TSE and BLADE T2-TIRM sequences as opposed to the conventional T2-TSE and T2-TIRM sequences for sagittal acquisition at 1.5T....

journal_title：Magnetic resonance imaging

authors： Lavdas E,Mavroidis P,Topaltzikis T,Slatinopoulos V,Roka V,Vlachopoulou A,Papanikolaou N,Stathakis S,Kapsalaki E,Batsikas G

更新日期：2013-12-01 00:00:00

abstract：:Resting fluctuations in arterial CO2 (a cerebral vasodilator) are believed to be an important source of low-frequency blood oxygenation level dependent (BOLD) signal fluctuations. In this study we focus on the two commonly used resting-states in functional magnetic resonance imaging experiments, eyes open and eyes clo...

journal_title：Magnetic resonance imaging

authors： Peng T,Niazy R,Payne SJ,Wise RG

更新日期：2013-04-01 00:00:00

abstract：:Complete dissection is the current reference method to quantify muscle and fat tissue on pig carcasses. Magnetic resonance imaging (MRI) is an appropriate nondestructive alternative method that can provide reliable and quantitative information on pig carcass composition without losing the spatial information. We have ...

journal_title：Magnetic resonance imaging

authors： Monziols M,Collewet G,Mariette F,Kouba M,Davenel A

更新日期：2005-07-01 00:00:00

abstract：:Liposomes entrapping gadolinium-DTPA (Gd-DTPA) were synthesized from 60 mole percent egg phosphatidylcholine (EPC) and 40 mole percent cholesterol or EPC alone entrapping Gd-DTPA in diameters of 100 and 200 nm. Rats bearing Morris hepatoma in their flanks were imaged by MR pre- and post-contrast with free Gd-DTPA and ...

journal_title：Magnetic resonance imaging

authors： Unger EC,MacDougall P,Cullis P,Tilcock C

更新日期：1989-07-01 00:00:00

abstract：BACKGROUND:The diagnosis and management of mild traumatic brain injury (MTBI) continue to be subjects of debate, with varying opinions regarding the extent to which tissue-based impairments versus the impacts of other stressors cause ongoing disability. Detecting areas of the brain with abnormalities that can explain s...

journal_title：Magnetic resonance imaging

authors： Kasahara K,Hashimoto K,Abo M,Senoo A

更新日期：2012-05-01 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：: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：:The ripening of the tomato fruit was delayed for several days (average 5 days) by a 1-day heat treatment at 42 degrees C. Ethylene production increased during the first 3 h, but, after 6 h inhibition was almost total in tomato fruit incubated at 42 degrees C. However, recovery of ethylene production was rapid if fruit...

journal_title：Magnetic resonance imaging

authors： Iwahashi Y,Horigane AK,Yoza K,Nagata T,Hosoda H

更新日期：1999-06-01 00:00:00

abstract：:Increased bone water content resulting from repetitive patellofemoral joint overloading has been suggested to be a possible mechanism underlying patellofemoral pain (PFP). To date, it remains unknown whether persons with PFP exhibit elevated bone water content. The purpose of this study was to determine whether recrea...

journal_title：Magnetic resonance imaging

authors： Ho KY,Hu HH,Colletti PM,Powers CM

更新日期：2014-09-01 00:00:00

abstract：:The successful use of magnetic resonance imaging (MRI) of a moldic fossil dicynodont from the Permian aeolian Hopeman Sandstone Formation of Elgin, Scotland, UK, provides paleontologists with a nondestructive technique for examining fossils preserved in this fashion. For large moldic fossils, medical scanners such as ...

journal_title：Magnetic resonance imaging

authors： Clark ND,Adams C,Lawton T,Cruickshank AR,Woods K

更新日期：2004-02-01 00:00:00

abstract：:We propose a novel processing method for reducing shading artifacts in quantitative susceptibility mapping (QSM) for prostate imaging. In the conventional method, calculation errors in the boundary regions between water and fat cause shading artifacts that degrade the image quality for QSM. In the proposed method, wat...

journal_title：Magnetic resonance imaging

authors： Sato R,Shirai T,Soutome Y,Bito Y,Ochi H

更新日期：2020-02-01 00:00:00

abstract：:Deep brain stimulation (DBS) is used increasingly in the field of movement disorders. The implanted electrodes create not only a prior risk to patient safety during MRI, but also a unique opportunity in the collection of functional MRI data conditioned by direct neural stimulation. We evaluated MRI-related heating for...

journal_title：Magnetic resonance imaging

authors： Bhidayasiri R,Bronstein JM,Sinha S,Krahl SE,Ahn S,Behnke EJ,Cohen MS,Frysinger R,Shellock FG

更新日期：2005-05-01 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：:Phantoms for evaluation of nuclear magnetic resonance (NMR) imaging systems were made from water-based agarose gels, according to a standard procedure herein described. Copper sulfate (CuSO4) was included in the gels to further affect their proton relaxation characteristics. The proton relaxation rates of each batch o...

journal_title：Magnetic resonance imaging

authors： Mitchell MD,Kundel HL,Axel L,Joseph PM

更新日期：1986-01-01 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：:Pulsed arterial spin labeling (PASL) is an increasingly common technique for noninvasively measuring cerebral blood flow (CBF) and has previously been shown to have good repeatability. It is likely to find a place in clinical trials and in particular the investigation of pharmaceutical agents active in the central ner...

journal_title：Magnetic resonance imaging

authors： Murphy K,Harris AD,Diukova A,Evans CJ,Lythgoe DJ,Zelaya F,Wise RG

更新日期：2011-12-01 00:00:00

abstract：:The objective of our study was to assess the feasibility of dynamic susceptibility contrast MR technique after bolus injection of SPIO and Gd-DOTA in a tumor model implanted in rats. Tumors were subcutaneously implanted in 24 rats. A FLASH sequence and EPI were evaluated. Different doses of AMI 227 and Gd-DOTA were as...

journal_title：Magnetic resonance imaging

authors： Loubeyre P,De Jaegere T,Miao Y,Landuyt W,Marchal G

更新日期：1999-05-01 00:00:00

abstract：:The development of NMR diffusion imaging and diffusion tensor imaging (DTI) has offered the possibility of studying the porous structures beyond anatomical imaging. In fact, random molecular motions, within tissue components, probe tissue microstructures. Up to now, the DTI method was mainly used to investigate cerebr...

journal_title：Magnetic resonance imaging

authors： Rossi C,Capuani S,Fasano F,Alesiani M,Maraviglia B

更新日期：2005-02-01 00:00:00

abstract：:Signal-to-noise ratio (SNR) is a critical factor in MR-guided high-intensity focused ultrasound (HIFU) for local heating, which can affect the accuracy of temperature measurement. In order to achieve high SNR and higher temporal resolution, dedicated coil arrays for MR-guided HIFU applications need to be developed. In...

journal_title：Magnetic resonance imaging

authors： Chen Q,Li Y,Jiang R,Zou C,Tie C,Wen J,Yang X,Zhang X,Liu X,Zheng H

更新日期：2020-01-01 00:00:00

abstract：:Rhizomelic chondrodysplasia punctata is a member of genetic peroxisomal disorders. Delayed myelination, which is probably related to the inadequacy of plasmalogens biosynthesis, is an important feature of this disorder. Direct assessment of neuropathologic aspects of RCDP syndrome such as neuronal degeneration and del...

journal_title：Magnetic resonance imaging

authors： Alkan A,Kutlu R,Yakinci C,Sigirci A,Aslan M,Sarac K

更新日期：2003-01-01 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：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：:A fast spin echo two-point Dixon (fast 2PD) technique was developed for efficient T2-weighted imaging with uniform water and fat separation. The technique acquires two interleaved fast spin echo images with water and fat in-phase and 180 degrees out-of-phase, respectively, and generates automatically separate water an...

journal_title：Magnetic resonance imaging

authors： Ma J,Son JB,Bankson JA,Stafford RJ,Choi H,Ragan D

更新日期：2005-12-01 00:00:00

abstract：PURPOSE:To evaluate the utility of fat fraction (FF) for the differentiation of different breast tissues and in various breast tumor subtypes using in vivo proton (1H) magnetic resonance spectroscopy (MRS). METHODS:1H MRS was performed on 68 malignant, 35 benign, and 30 healthy volunteers at 1.5 T. Malignant breast ti...

journal_title：Magnetic resonance imaging

authors： Agarwal K,Sharma U,Mathur S,Seenu V,Parshad R,Jagannathan NR

更新日期：2018-06-01 00:00:00