Electric stimulation fMRI of the perforant pathway to the rat hippocampus.

abstract：INTRODUCTION:Pharmacokinetic parameters derived from dynamic contrast-enhanced MRI (DCE-MRI) data are sensitive to acquisition and post-processing techniques, which makes it difficult to compare results obtained using different methods. In particular, one of the most important factors affecting estimation of model para...

journal_title：Magnetic resonance imaging

authors： Wake N,Chandarana H,Rusinek H,Fujimoto K,Moy L,Sodickson DK,Kim SG

更新日期：2018-10-01 00:00:00

abstract：:Etched particle tracks produced after heavy ion irradiation of polymer foils are used as model systems to test the performance of NMR in a newly developed ultrahigh magnetic field gradient system. The stimulated NMR echo decay of molecules diffusing in the channels, formulated in terms of the self part of the intermed...

journal_title：Magnetic resonance imaging

authors： Fujara F,Ilyina E,Nienstaedt H,Sillescu H,Spohr R,Trautmann C

更新日期：1994-01-01 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：:The goal of this study was to develop and evaluate high-resolution magnetic resonance spectroscopic imaging (MRSI) utilizing the gains in signal-to-noise ratio (SNR) provided by combining higher magnetic field with high-sensitivity phased-array (PA) coils. We investigated the maximum improvement in spatial resolution ...

journal_title：Magnetic resonance imaging

authors： Xu D,Chen AP,Cunningham C,Osorio JA,Nelson SJ,Vigneron DB

更新日期：2006-01-01 00:00:00

abstract：:T2-weighted images are considered the most sensitive for lesion detection at high field; however, long imaging time is problematic. Accordingly, the authors compared four breath-hold T2 or T2* weighted sequences comprising T2*-weighted FLASH, T2*-weighted PSIF, T2-weighted rapid spin echo (RASE), and T2-weighted Turbo...

journal_title：Magnetic resonance imaging

authors： Simm FC,Semelka RC,Recht M,Deimling M,Lenz G,Laub GA

更新日期：1992-01-01 00:00:00

abstract：:Magnetic resonance imaging (MRI) has been used to characterize tissues in morphological studies. Here, 23Na NMR imaging was used to study the distribution in muscle of brine (5 M NaCl), injected before onset of rigor mortis. First, the distribution of brine was monitored in excised muscle from rabbits for 6 hr followi...

journal_title：Magnetic resonance imaging

authors： Renou JP,Benderbous S,Bielicki G,Foucat L,Donnat JP

更新日期：1994-01-01 00:00:00

abstract：:NMR imaging and localized 1H spectroscopy of a variety of aquatic organisms in vivo is described for the first time. The practical consideration of life support, water volume, salinity, and anesthesia are discussed and solutions presented. Such animal studies shape our understanding of physiology, biochemistry, and bi...

journal_title：Magnetic resonance imaging

authors： Blackband SJ,Stoskopf MK

更新日期：1990-01-01 00:00:00

abstract：:One of the most critical structural parameters in elastomeric materials is the density of cross-linking between the polymeric chains. This chemical feature greatly affects chain motions and is determinant in controlling mechanical properties of the final product. NMR techniques are widely and efficiently applied to in...

journal_title：Magnetic resonance imaging

authors： Borgia GC,Fantazzini P,Ferrando A,Maddinelli G

更新日期：2001-04-01 00:00:00

abstract：OBJECT:Virtual Phantom Magnetic Resonance Imaging (ViP MRI) is a method to generate reference signals on MR images, using external radiofrequency (RF) signals. The aim of this study was to assess the feasibility of ViP MRI to generate complex-data images of phantoms mimicking water-fat systems. MATERIALS AND METHODS:V...

journal_title：Magnetic resonance imaging

authors： Salvati R,Hitti E,Bellanger JJ,Saint-Jalmes H,Gambarota G

更新日期：2016-06-01 00:00:00

abstract：:We report the MR appearance of undifferentiated (embryonal) sarcoma of the liver (USL) in a 13-year-old female who presented with a 1-year history of intermittent abdominal pain, weight loss, and fatigue. The tumor was a large, solitary, well-defined focal mass lesion with multiple cystic spaces, septations, and subst...

journal_title：Magnetic resonance imaging

authors： Psatha EA,Semelka RC,Fordham L,Firat Z,Woosley JT

更新日期：2004-07-01 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：:A model of MRI signal intensity which is a function of perfusion is developed based upon the assumption that biological tissue can be represented by a blood and tissue compartment. The longitudinal magnetization is derived from the Bloch equations which are modified to model the magnetization in both the blood and tis...

journal_title：Magnetic resonance imaging

authors： Gullberg GT,Ma X,Parker DL,Roy DN

更新日期：1991-01-01 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：:We examined if MR diffusion tensor imaging with fiber tracking could be performed on the sciatic nerve. In 3 healthy volunteers the proximal thigh was examined on a 1.5-Tesla MR-scanner with a 2-channel phased-array coil. Though inherently susceptible to motion, field inhomogeneities, and fast T(2)-relaxation of the d...

journal_title：Magnetic resonance imaging

authors： Skorpil M,Karlsson M,Nordell A

更新日期：2004-06-01 00:00:00

abstract：:MRI reconstruction using super-resolution is presented and shown to improve spatial resolution in cases when spatially-selective RF pulses are used for localization. In 2-D multislice MRI, the resolution in the slice direction is often lower than the in-plane resolution. For certain diagnostic imaging applications, is...

journal_title：Magnetic resonance imaging

authors： Greenspan H,Oz G,Kiryati N,Peled S

更新日期：2002-06-01 00:00:00

abstract：:Poly(L-glutamic acid) (PGA)-cystamine-[gadolinium (Gd)-DO3A] was prepared in high yield with a high Gd-DO3A conjugation efficiency. Approximately 55% of the carboxylic groups in PGA were loaded with Gd-DO3A via cystamine as the spacer. Cystamine can be readily cleaved by endogenous thiols to release the Gd(III) chelat...

journal_title：Magnetic resonance imaging

authors： Ke T,Feng Y,Guo J,Parker DL,Lu ZR

更新日期：2006-09-01 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：: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：:Multi-echo pulse sequences for producing T2-weighted images in much reduced imaging times have recently been developed for routine clinical use. A number of recent articles have described the contrast obtained with fast spin-echo (FSE) sequences and have generally indicated that they depict tissues very similarly to c...

journal_title：Magnetic resonance imaging

authors： Constable RT,Anderson AW,Zhong J,Gore JC

更新日期：1992-01-01 00:00:00

abstract：:A magnetic resonance imaging (MRI) method is described that allows interleaved measurements of transverse (R(2)(*) and R(2)) and longitudinal (R(1)) relaxation rates of tissue water in conjunction with spin labeling. The image-contrasts are intrinsically blood oxygenation level dependent (BOLD) and cerebral blood flow...

journal_title：Magnetic resonance imaging

authors： Hyder F,Renken R,Kennan RP,Rothman DL

更新日期：2000-04-01 00:00:00

abstract：:Echo planar imaging (EPI) was extended for the acquisition of both, the spin-echo (SE) and the stimulated echo in a stimulated echo sequence after one excitation from thermal equilibrium. The two independent EPI images reflect different states of the transverse magnetization excited and measured almost simultaneously....

journal_title：Magnetic resonance imaging

authors： Börnert P,Jensen D

更新日期：1994-01-01 00:00:00

abstract：:The objective of this study was to describe magnetic resonance (MR) findings with a 1.5T imager for hepatic parenchymal changes after proton beam radiotherapy. Thirty-two patients who received proton radiotherapy with doses of 50-87 Gy underwent MR imaging 1-75 months (mean 22 months) after the start of irradiation. A...

journal_title：Magnetic resonance imaging

authors： Onaya H,Itai Y,Yoshioka H,Ahmadi T,Niitsu M,Okumura T,Akine Y,Matsuzaki Y,Doi M,Tsuji H,Tsujii H

更新日期：2000-07-01 00:00:00

abstract：PURPOSE:To develop a free-running framework for 3D isotropic simultaneous myocardial T1/T2 mapping and cine imaging. METHODS:Continuous data acquisition with 3D golden angle radial trajectory is used in conjunction with T2 preparation of varying echo times and inversion recovery (IR) pulses to enable simultaneous myoc...

journal_title：Magnetic resonance imaging

authors： Qi H,Bustin A,Cruz G,Jaubert O,Chen H,Botnar RM,Prieto C

更新日期：2019-11-01 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：:Several previous 31 phosphorus magnetic resonance spectroscopy ((31)P MRS) studies performing incremental or progressive muscle exercises have observed that a decrease in pH is accompanied with an acceleration in phosphocreatine (PCr) hydrolysis. The purpose of this study was to investigate the relationship between PC...

journal_title：Magnetic resonance imaging

authors： Schocke MF,Esterhammer R,Kammerlander C,Rass A,Kremser C,Fraedrich G,Jaschke WR,Greiner A

更新日期：2004-01-01 00:00:00

abstract：:We report the first application of a novel diffusion-based MRI method, called diffusional kurtosis imaging (DKI), to investigate changes in brain tissue microstructure in patients with mild cognitive impairment (MCI) and AD and in cognitively intact controls. The subject groups were characterized and compared in terms...

journal_title：Magnetic resonance imaging

authors： Falangola MF,Jensen JH,Tabesh A,Hu C,Deardorff RL,Babb JS,Ferris S,Helpern JA

更新日期：2013-07-01 00:00:00

abstract：:The NMR relaxivities of Gd-EOB-DTPA and Gd-DTPA were determined in the kidney and liver of intact male Wistar rats immediately following sacrifice and in vitro in solutions and gels, at 1.5 T using a clinical MR scanner, T1 and T2 values of tissue samples were derived from spin-echo image sequences. Tissue gadolinium ...

journal_title：Magnetic resonance imaging

authors： Shuter B,Tofts PS,Wang SC,Pope JM

更新日期：1996-01-01 00:00:00

abstract：:Twenty-seven patients with soft-tissue tumors were examined with a Picker 0.15-tesla resistive magnet and by computed tomography (CT). In all but one patient, MRI was better than or equal to CT in defining the anatomic extent of the tumor. We could determine whether major vascular structures were engulfed by the tumor...

journal_title：Magnetic resonance imaging

authors： Weekes RG,Berquist TH,McLeod RA,Zimmer WD

更新日期：1985-01-01 00:00:00

abstract：:In porous material research, one main interest of nuclear magnetic resonance diffusion (NMR) experiments is the determination of the shape of pores. While it has been a longstanding question if this is in principle achievable, it has been shown recently that it is indeed possible to perform NMR-based diffusion pore im...

journal_title：Magnetic resonance imaging

authors： Laun FB,Kuder TA

更新日期：2013-09-01 00:00:00

abstract：INTRODUCTION:Recent animal and human epidemiological studies suggest that early childhood exposure to anesthesia may have adverse effects on brain development. As more than 50% of pregnant women in the United States and one-third in the United Kingdom receive regional anesthesia during labor and delivery, understanding...

journal_title：Magnetic resonance imaging

authors： Spann MN,Serino D,Bansal R,Hao X,Nati G,Toth Z,Walsh K,Chiang IC,Sanchez-Peña J,Liu J,Kangarlu A,Liu F,Duan Y,Shova S,Fried J,Tau GZ,Rosen TS,Peterson BS

更新日期：2015-02-01 00:00:00