Primary epiploic appendagitis: MRI findings.

abstract：:Image quality and total scan time in MRI are determined in large part by the trajectory employed to sample the Fourier space. Each trajectory has different properties like coverage of k-space, scan time, sensitivity to off-resonance conditions, etc. These properties are often contradictory, therefore a universal optim...

journal_title：Magnetic resonance imaging

authors： Sabat S,Mir R,Guarini M,Guesalaga A,Irarrazaval P

更新日期：2003-09-01 00:00:00

abstract：:Quantitative MRI of neuromelanin (NM) containing structures (referred to as NM-MRI) in the brainstem, namely the locus coeruleus (LC) and substantia nigra (SN), may assist with the early detection of Parkinson's disease (PD) and Alzheimer's disease (AD) as well as differential diagnosis in the early disease stages. In...

journal_title：Magnetic resonance imaging

authors： Chen X,Huddleston DE,Langley J,Ahn S,Barnum CJ,Factor SA,Levey AI,Hu X

更新日期：2014-12-01 00:00:00

abstract：:Partial volume effects in proton magnetic resonance spectroscopy in the brain have been studied previously in terms of proper water concentration calculations, but there is a lack of disclosure in terms of voxel placement techniques that would affect the calculations. The purpose of this study is to facilitate a fully...

journal_title：Magnetic resonance imaging

authors： Lee H,Caparelli E,Li H,Mandal A,Smith SD,Zhang S,Bilfinger TV,Benveniste H

更新日期：2013-09-01 00:00:00

abstract：:The advantages of the application of NMR imaging to the studies of enhanced oil recovery methods that include polymer slug flooding, combination slug flooding, and thermal soaking are described. ...

journal_title：Magnetic resonance imaging

authors： Weimin W,Dongjiang L,Wei L

更新日期：1996-01-01 00:00:00

abstract：PURPOSE:The state-of-the-art method to quantify sodium concentrations in vivo consists in a fully relaxed 3D spin-density (SD) weighted acquisition. Nevertheless, most sodium MRI clinical studies use short-TR SD acquisitions to reduce acquisition durations. We present a clinically viable implementation of the Variable ...

journal_title：Magnetic resonance imaging

authors： Coste A,Boumezbeur F,Vignaud A,Madelin G,Reetz K,Le Bihan D,Rabrait-Lerman C,Romanzetti S

更新日期：2019-05-01 00:00:00

abstract：:A new approach to solid-state imaging (SSI) is presented. The method relies on narrowing the resonance line using the Lee-Goldburg sequence. The technique is easy to implement in practice and may find widespread applications in materials science. ...

journal_title：Magnetic resonance imaging

authors： De Luca F,Lugeri N,De Simone BC,Maraviglia B

更新日期：1992-01-01 00:00:00

abstract：:Magic-angle sample spinning is one of the cornerstones in high-resolution NMR of solid and semisolid materials. The technique enhances spectral resolution by averaging away rank 2 anisotropic spin interactions, thereby producing isotropic-like spectra with resolved chemical shifts and scalar couplings. In principle, i...

journal_title：Magnetic resonance imaging

authors： Sakellariou D,Meriles CA,Martin RW,Pines A

更新日期：2005-02-01 00:00:00

abstract：:We report initial NMR studies of continuous flow laser-polarized xenon gas, both in unrestricted tubing, and in a model porous media. The study uses Pulsed Gradient Spin Echo-based techniques in the gas-phase, with the aim of obtaining more sophisticated information than just translational self-diffusion coefficients....

journal_title：Magnetic resonance imaging

authors： Mair RW,Wang R,Rosen MS,Candela D,Cory DG,Walsworth RL

更新日期：2003-04-01 00:00:00

abstract：:A variety of shortcomings are associated with most currently used gastrointestinal contrast agents for magnetic resonance imaging (MRI). Artifacts resulting from peristalsis and other motions in the abdominal region are produced by many positive contrast agents (which increase signal intensity). Although this is not a...

journal_title：Magnetic resonance imaging

authors： Briggs RW,Wu Z,Mladinich CR,Stoupis C,Gauger J,Liebig T,Ros PR,Ballinger JR,Kubilis P

更新日期：1997-01-01 00:00:00

abstract：:The optics of the ocular lens are determined by its geometry (shape and volume) and its inherent gradient of refractive index (water to protein ratio), which are in turn maintained by unique cellular physiology known as the lens internal microcirculation system. Previously, magnetic resonance imaging (MRI) has been us...

journal_title：Magnetic resonance imaging

authors： Muir ER,Pan X,Donaldson PJ,Vaghefi E,Jiang Z,Sellitto C,White TW

更新日期：2020-07-01 00:00:00

abstract：:Cross-terms between imaging and diffusion gradients, unaccounted for during tensor calculations, can lead to erroneous estimation of diffusivity and fractional anisotropy (FA) in regions of isotropic and anisotropic diffusion. Cross-term of magnitude 136.8±1.6 s/mm(2), artificially introduced in the slice-encode direc...

journal_title：Magnetic resonance imaging

authors： Nair G,Hu XP

更新日期：2012-07-01 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

abstract：:The application of NMR Fricke-gelatin dosimetry to the imaging of dose distributions around high dose rate (HDR) radioactive Ir-192 seeds in brachytherapy is presented. The duration of the irradiations required to give changes of the Fricke-gelatin NMR characteristics, which were readily detected by the magnetic reson...

journal_title：Magnetic resonance imaging

authors： Schreiner LJ,Crooks I,Evans MD,Keller BM,Parker WA

更新日期：1994-01-01 00:00:00

abstract：:The purpose of this investigation is to evaluate the positioning and to confirm the volume concept of the Lea's Shield diaphragm utilizing MR imaging. We evaluated the device in two women, one nulliparous and one multiparous. We were able to comprehensively evaluate the device in both patients and answer all questions...

journal_title：Magnetic resonance imaging

authors： Maldjian C,Pelosi MA 2nd,Pelosi MA 3rd,Adam R

更新日期：2001-06-01 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：PURPOSE:To prospectively compare image quality and reliability of a non-contrast, self-navigated 3D whole-heart magnetic resonance angiography (MRA) sequence with contrast-enhanced computed tomography angiography (CTA) for sizing of thoracic aortic aneurysm (TAA). METHODS:Self-navigated 3D whole-heart 1.5 T MRA was pe...

journal_title：Magnetic resonance imaging

authors： Poskaite P,Pamminger M,Kranewitter C,Kremser C,Reindl M,Reiter G,Piccini D,Dumfarth J,Henninger B,Tiller C,Holzknecht M,Reinstadler SJ,Klug G,Metzler B,Mayr A

更新日期：2021-02-01 00:00:00

abstract：:With the recent development of integrated positron emission tomography-magnetic resonance imaging (PET-MRI) scanners, new possibilities for quantitative molecular imaging of cancer are realized. However, the practical advantages and potential clinical benefits of the ability to record PET and MRI data simultaneously m...

journal_title：Magnetic resonance imaging

authors： Yankeelov TE,Peterson TE,Abramson RG,Izquierdo-Garcia D,Arlinghaus LR,Li X,Atuegwu NC,Catana C,Manning HC,Fayad ZA,Gore JC

更新日期：2012-11-01 00:00:00

abstract：:Quantifying the intracranial tissue volume changes in magnetic resonance imaging (MRI) assists specialists to analyze the effects of natural or pathological changes. Since these changes can be subtle, the accuracy of the automatic compartmentalization method is always criticized by specialists. We propose and then eva...

journal_title：Magnetic resonance imaging

authors： Azimbagirad M,Simozo FH,Senra Filho ACS,Murta Junior LO

更新日期：2020-01-01 00:00:00

abstract：:Quantitative processing of NMR relaxation images depends on the characteristics of the used fitting algorithm. Therefore several common fitting algorithms are compared for decay curves with low signal-to-noise ratios. The use of magnitude data yields a non-zero base line, and is shown to result in an overestimation of...

journal_title：Magnetic resonance imaging

authors： van der Weerd L,Vergeldt FJ,Adrie de Jager P,Van As H

更新日期：2000-11-01 00:00:00

abstract：:In independent component analysis (ICA), principal component analysis (PCA) is generally used to reduce the raw data to a few principal components (PCs) through eigenvector decomposition (EVD) on the data covariance matrix. Although this works for spatial ICA (sICA) on moderately sized fMRI data, it is intractable for...

journal_title：Magnetic resonance imaging

authors： Wang Z,Wang J,Calhoun V,Rao H,Detre JA,Childress AR

更新日期：2006-06-01 00:00:00

abstract：OBJECTIVES:To compare the accuracy of contrast-enhanced ultrasound (CEUS) and Dynamic contrast-enhanced (DCE) magnetic resonance imaging (MRI) for the assessment of changes in tissue vascularization as result of sorafenib treatment in a rat model of hepatocellular carcinoma (HCC). METHODS:Male Buffalo rats with orthot...

journal_title：Magnetic resonance imaging

authors： Muñoz NM,Minhaj AA,Maldonado KL,Kingsley CV,Cortes AC,Taghavi H,Polak U,Mitchell JM,Ensor JE,Bankson JA,Rashid A,Avritscher R

更新日期：2019-04-01 00:00:00

abstract：:Functional T1ρ mapping has been proposed as a method to assess pH and metabolism dynamics in the brain with high spatial and temporal resolution. The purpose of this work is to describe and evaluate a variant of the spin-locked echo-planar imaging sequence for functional T1ρ mapping at 3T. The proposed sequence rapidl...

journal_title：Magnetic resonance imaging

authors： Johnson CP,Heo HY,Thedens DR,Wemmie JA,Magnotta VA

更新日期：2014-11-01 00:00:00

abstract：:The aim of this work is to present and evaluate a level-set segmentation approach with vesselness-dependent anisotropic energy weights, which focuses on the exact segmentation of malformed as well as small vessels from time-of-flight (TOF) magnetic resonance angiography (MRA) datasets. In a first step, a vesselness fi...

journal_title：Magnetic resonance imaging

authors： Forkert ND,Schmidt-Richberg A,Fiehler J,Illies T,Möller D,Säring D,Handels H,Ehrhardt J

更新日期：2013-02-01 00:00:00

abstract：:In congenital diaphragmatic hernia (CDH), lung hypoplasia and secondary pulmonary hypertension are the major causes of death and severe disability. Based on new therapeutic strategies survival rates could be improved to up to 80%. However, after surgical repair of CDH, long-term follow-up of these pediatric patients i...

journal_title：Magnetic resonance imaging

authors： Zöllner FG,Daab M,Weidner M,Sommer V,Zahn K,Schaible T,Weisser G,Schoenberg SO,Neff KW,Schad LR

更新日期：2015-12-01 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：: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：:The purpose of the study was to determine whether diffusion-weighted magnetic resonance imaging (DWI) could identify focal lesions that develop in ischemia-sensitive cerebral tissues during reperfusion following global brain ischemia. Localized 1H-Magnetic Resonance Spectroscopy (1H-MRS) measurements were also obtaine...

journal_title：Magnetic resonance imaging

authors： Bizzi A,Righini A,Turner R,Le Bihan D,Bockhorst KH,Alger JR

更新日期：1996-01-01 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：:The purpose of this study was to analyze background parenchymal enhancement (BPE) in the contralateral normal breast of cancer patients during the course of neoadjuvant chemotherapy (NAC). Forty-five subjects were analyzed. Each patient had three MRIs, one baseline (B/L) and two follow-up (F/U) studies. The fibrogland...

journal_title：Magnetic resonance imaging

authors： Chen JH,Yu H,Lin M,Mehta RS,Su MY

更新日期：2013-11-01 00:00:00

abstract：OBJECTIVE:The purpose of this study is to investigate the correlation between the liver kinetics of gadolinium-ethoxybenzyl-diethylenetriamine pentaacetic acid (Gd-EOB-DTPA) and liver histopathology in a mouse model of NASH by using dynamic contrast-enhanced MRI. MATERIALS AND METHODS:Twenty male C57/BL6 mice aged 8we...

journal_title：Magnetic resonance imaging

authors： Yamada T,Obata A,Kashiwagi Y,Rokugawa T,Matsushima S,Hamada T,Watabe H,Abe K

更新日期：2016-07-01 00:00:00