Fast and exact flow measurements with the fast Fourier flow technique.

abstract：:Dynamic contrast-enhanced 2D MR imaging of the breast has shown high sensitivity and specificity for the detection and characterization of breast lesions. We investigated the ability of a dynamic fast 3D MR imaging technique that repeatedly scans the whole breast in 44-s intervals without an interscan delay time to ob...

journal_title：Magnetic resonance imaging

authors： Heiberg EV,Perman WH,Herrmann VM,Janney CG

更新日期：1996-01-01 00:00:00

abstract：:Magnetic resonance microscopy of skin from hairless rats under the influence of electrical fields was conducted for two cases: 1) low voltage constant electrical fields and 2) high-voltage short pulse, electrical fields. Under conditions of the low voltage and low current iontophoresis, i.e., 0 to 20 V, and 0 to 0.5 m...

journal_title：Magnetic resonance imaging

authors： Caban JB,Moerland TS,Gibbs SJ,McFadden L,Locke BR

更新日期：1999-10-01 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：: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：INTRODUCTION:Previous investigations of test-retest reliability of cerebral blood flow (CBF) at rest measured with pseudo-continuous Arterial Spin Labeling (pCASL) demonstrated good reliability, but are limited by the use of similar scanner platforms. In the present study we examined test-retest reliability of CBF in r...

journal_title：Magnetic resonance imaging

authors： Almeida JRC,Greenberg T,Lu H,Chase HW,Fournier JC,Cooper CM,Deckersbach T,Adams P,Carmody T,Fava M,Kurian B,McGrath PJ,McInnis MG,Oquendo MA,Parsey R,Weissman M,Trivedi M,Phillips ML

更新日期：2018-01-01 00:00:00

abstract：:Fast magnetic resonance (MR) imaging provides a consistent and predictable appearance of vascular abnormalities as shown by four patients with thrombi, dissection and aneurysm. Fast MR images are obtained during breath-holding, resulting in an absence of respiratory motion artifacts. The time of MR study is much less ...

journal_title：Magnetic resonance imaging

authors： Raval B,Kulkarni M,Narayana P,Mehta S

更新日期：1988-07-01 00:00:00

abstract：:The relative value of two different MRI procedures for the assessment of infratentorial extension in multiple sclerosis (MS) was studied. Multislice spin-echo techniques were used overall. Procedure A consisted of parasagittal T1-weighted images (500/30) and axial T2-weighted images (2500/30, 2500/120). Procedure B co...

journal_title：Magnetic resonance imaging

authors： Van de Vyver FL,Truyen L,Gheuens J,Degryse HR,Peersman GV,Martin JJ

更新日期：1989-05-01 00:00:00

abstract：:Images acquired in the presence of magnetic field deviations and reconstructed without taking into account the off-resonance, are distorted and corrupted with artifacts. Several post-processing algorithms have been developed for correcting the distortion when it is not possible to fix the field inhomogeneities. These ...

journal_title：Magnetic resonance imaging

authors： Akel JA,Rosenblitt M,Irarrazaval P

更新日期：2002-02-01 00:00:00

abstract：:Automatic segmentation of different types of tissue from magnetic resonance images is of great importance for clinical and research applications, particularly large-scale and longitudinal studies of brain pathology. We developed a fully automated algorithm for the segmentation of lateral ventricles from cranial magnet...

journal_title：Magnetic resonance imaging

authors： Schönmeyer R,Prvulovic D,Rotarska-Jagiela A,Haenschel C,Linden DE

更新日期：2006-12-01 00:00:00

abstract：:The clinical evaluation of three-dimensional time-of-flight MR angiography was prospectively performed in 16 patients with intracranial meningioma. MR angiographic techniques used in this study both with and without gadopentetate dimeglumine made it possible to demonstrate the topographic relationship between the tumo...

journal_title：Magnetic resonance imaging

authors： Kadota T,Kuriyama K,Inoue E,Fujita M,Nakagawa H,Kuroda C

更新日期：1993-01-01 00:00:00

abstract：:The density driven convection phenomenon is expected to have a significant and positive role in CO2 geological storage capacity and safety. The onset and development of density-driven convective on the core scale is critical to understand the mass transfer mechanism. In this paper, laboratory experiments were conducte...

journal_title：Magnetic resonance imaging

authors： Teng Y,Jiang L,Fan Y,Liu Y,Wang D,Abudula A,Song Y

更新日期：2017-06-01 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：:The aim of this study was to establish a rapid method for in vivo quantification of a large range of flow velocities using phase information. A basic gradient-echo sequence was constructed, in which flow was encoded along the slice selection direction by variation of the amplitude of a bipolar gradient without changes...

journal_title：Magnetic resonance imaging

authors： Ståhlberg F,Mogelvang J,Thomsen C,Nordell B,Stubgaard M,Ericsson A,Sperber G,Greitz D,Larsson H,Henriksen O

更新日期：1989-11-01 00:00:00

abstract：:The discrimination of tumor boundaries from normal tissue, as well as the evaluation of tissue heterogeneity and tumor grading often continue to pose a challenge in MRI. Although yielding promising results in various fields of medical imaging, two- dimensional (2D) texture analysis in MRI has, until now, demonstrated ...

journal_title：Magnetic resonance imaging

authors： Mahmoud-Ghoneim D,Toussaint G,Constans JM,de Certaines JD

更新日期：2003-11-01 00:00:00

abstract：:The objective of this study was to analyze regional variations of magnetic resonance (MR) relaxation times (T1ρ and T2) in hip joint cartilage of healthy volunteers and subjects with femoral acetabular impingement (FAI). Morphological and quantitative images of the hip joints of 12 healthy volunteers and 9 FAI patient...

journal_title：Magnetic resonance imaging

authors： Subburaj K,Valentinitsch A,Dillon AB,Joseph GB,Li X,Link TM,Vail TP,Majumdar S

更新日期：2013-09-01 00:00:00

abstract：:Functional magnetic resonance imaging favors the use of multi-slice gradient-recalled echo-planar imaging due to its short image acquisition times, whole brain coverage and sensitivity to BOLD contrast. However, despite its advantages, gradient-recalled echo-planar imaging also is sensitive to static magnetic field gr...

journal_title：Magnetic resonance imaging

authors： Cordes D,Turski PA,Sorenson JA

更新日期：2000-11-01 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：:Myelin water fraction (MWF) images in brain tend to be spatially noisy with unknown or no apparent spatial patterns structure, so values are therefore typically averaged over large white matter (WM) volumes. We investigated the existence of an inherent spatial structure in MWF maps and explored the benefits of examini...

journal_title：Magnetic resonance imaging

authors： Baumeister TR,Kolind SH,MacKay AL,McKeown MJ

更新日期：2020-04-01 00:00:00

abstract：:Proton MR measurements were performed in lyophilized urine samples collected from 5 normals (N) and 5 idiopathic hypercalciuric recurrent stone formers (SF). T1 and T2 relaxation times were measured with a Bruker PC Multispec at 20 MHz and 37 degrees C in the lyophilized samples and in samples gradually rehydrated. Si...

journal_title：Magnetic resonance imaging

authors： Azoury R,Abrashkin S,Weininger J,Iaina A

更新日期：1988-01-01 00:00:00

abstract：:To acquire high-resolution T(1)-weighted images of the liver in rats, for which breath-holding cannot be ensured, respiratory triggering is essential. At the respiratory rate of 30-60 times/min in rats, however, T(1)-weighted images cannot be obtained with simple triggering. As a simple solution to this, we applied mu...

journal_title：Magnetic resonance imaging

authors： Morikawa S,Murayama H,Fujimoto S,Shiino A,Inubushi T

更新日期：2012-04-01 00:00:00

abstract：:A single injection of high-dose steroid (20 mg/kg) has been reported to induce necrotic lesions in the proximal metaphysis and diaphysis of the rabbit femur. In the rabbit osteonecrosis (ON) model induced by two-dose horse serum injections, contrast-enhanced magnetic resonance imaging (MRI) and T2*-weighted dynamic MR...

journal_title：Magnetic resonance imaging

authors： Takao M,Sugano N,Nishii T,Sakai T,Nakamura N,Yoshikawa H

更新日期：2009-02-01 00:00:00

abstract：:This paper describes a geometrically small NMR imaging system which has been developed and assembled within a university medical center environment. Consideration is given to the technical specifications and basic economics for the magnet system, NMR spectrometer, and computer configuration. Initial research objective...

journal_title：Magnetic resonance imaging

authors： Thomas SR,Ackerman JL,Goebel JR,Davis M,Kereiakes JG,Lin YY

更新日期：1982-01-01 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：: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：:Quantitative analysis has tremendous but mostly unrealized potential in healthcare to support objective and accurate interpretation of the clinical imaging. In 2008, the National Cancer Institute began building the Quantitative Imaging Network (QIN) initiative with the goal of advancing quantitative imaging in the con...

journal_title：Magnetic resonance imaging

authors： Fedorov A,Beichel R,Kalpathy-Cramer J,Finet J,Fillion-Robin JC,Pujol S,Bauer C,Jennings D,Fennessy F,Sonka M,Buatti J,Aylward S,Miller JV,Pieper S,Kikinis R

更新日期：2012-11-01 00:00:00

abstract：:Functional magnetic resonance imaging (fMRI) was used to investigate the spatial distribution of cortical activation in frontal and parietal lobes during auditory and visual oddball tasks in 10 healthy subjects. The purpose of the study was to compare activation within auditory and visual modalities and identify commo...

journal_title：Magnetic resonance imaging

authors： Stevens AA,Skudlarski P,Gatenby JC,Gore JC

更新日期：2000-06-01 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：:Signal fluctuations in functional magnetic resonance imaging (fMRI) can result from a number of sources that may have a neuronal, physiologic or instrumental origin. To determine the relative contribution of these sources, we recorded physiological (respiration and cardiac) signals simultaneously with fMRI in human vo...

journal_title：Magnetic resonance imaging

authors： Bianciardi M,Fukunaga M,van Gelderen P,Horovitz SG,de Zwart JA,Shmueli K,Duyn JH

更新日期：2009-10-01 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：:Although there is ample evidence in the literature for structural, functional and physiological asymmetries in the two hemispheres of human brain, direct evidence of a similar asymmetry in the in vivo distribution of brain metabolites has been lacking. In this study, the existence of chemical asymmetries in six differ...

journal_title：Magnetic resonance imaging

authors： Jayasundar R,Raghunathan P

更新日期：1997-01-01 00:00:00