Incidental magnetization transfer contrast in standard multislice imaging.

abstract：OBJECTIVES:To investigate the feasibility of chemical exchange saturation transfer (CEST) MRI in patients with breast carcinomas and possible correlations between magnetization transfer asymmetry (MTRasym) values and histological features, such as tumor grade and the Ki-67 proliferation index. MATERIALS AND METHODS:Ni...

journal_title：Magnetic resonance imaging

authors： Zaric O,Farr A,Poblador Rodriguez E,Mlynarik V,Bogner W,Gruber S,Asseryanis E,Singer CF,Trattnig S

更新日期：2019-06-01 00:00:00

abstract：PURPOSE:Diffusional kurtosis imaging (DKI) is sensitive to the effects of signal noise due to strong diffusion weightings and higher order modeling of the diffusion weighted signal. A simple noise correction scheme is proposed to remove the majority of the noise bias in the estimated diffusional kurtosis. METHODS:Weig...

journal_title：Magnetic resonance imaging

authors： Glenn GR,Tabesh A,Jensen JH

更新日期：2015-01-01 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：:An efficient method for obtaining longitudinal relaxation time (T1) maps is based on acquiring two spoiled gradient recalled echo (SPGR) images in steady states with different flip angles, which has also been extended, with additional acquisitions, to obtain a tissue water content (M0) map. Several factors, including ...

journal_title：Magnetic resonance imaging

authors： Sabati M,Maudsley AA

更新日期：2013-12-01 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：PURPOSE:To evaluate the use of the double-echo steady-state (DESS) sequence for acquiring high-resolution breast images with diffusion and T2 weighting. MATERIALS AND METHODS:Phantom scans were used to verify the T2 and diffusion weighting of the DESS sequence. Image distortion was evaluated in volunteers by comparing...

journal_title：Magnetic resonance imaging

authors： Granlund KL,Staroswiecki E,Alley MT,Daniel BL,Hargreaves BA

更新日期：2014-05-01 00:00:00

abstract：PURPOSE:The purpose of this study was to determine the pre- and postpubertal 1H magnetic resonance spectroscopic characteristics of the normal testis to establish baseline values for further clinical studies. MATERIALS AND METHODS:The subjects consisted of male volunteers, of whom 19 were prepubertal with ages between...

journal_title：Magnetic resonance imaging

authors： Firat AK,Uğraş M,Karakaş HM,Erdem G,Kurus M,Ugras M,Celik T,Kahraman B,Doğanay S

更新日期：2008-02-01 00:00:00

abstract：:The purpose of this study was to compare the relative conspicuity of the pancreaticobiliary tree on respiratory-triggered three-dimensional turbo spin echo (3D TSE RT) and breath hold single-shot turbo spin echo (SSTSE BH) acquisitions respectively in MRCP imaging. Both techniques were applied to 61 patients with clin...

journal_title：Magnetic resonance imaging

authors： Papanikolaou N,Karantanas AH,Heracleous E,Costa JC,Gourtsoyiannis N

更新日期：1999-11-01 00:00:00

abstract：BACKGROUND AND PURPOSE:The widespread propagation of synchronized neuronal firing in seizure disorders may affect cortical and subcortical brain regions. Diffusion tensor imaging (DTI) can noninvasively quantify white matter integrity. The purpose of this study was to investigate the abnormal changes of white matter in...

journal_title：Magnetic resonance imaging

authors： Meng L,Xiang J,Kotecha R,Rose D,Zhao H,Zhao D,Yang J,Degrauw T

更新日期：2010-11-01 00:00:00

abstract：BACKGROUND:Since the advent of magnetic resonance imaging, metal artifacts have posed an important diagnostic problem in different fields of medicine. However, this has not been systematically studied in patients undergoing surgery for brain tumors. OBJECTIVE:This study was planned to assess whether metal artifacts ca...

journal_title：Magnetic resonance imaging

authors： Bagheri MH,Ahmadloo N,Rezaian S

更新日期：2013-06-01 00:00:00

abstract：:SSFP-based fMRI techniques, known for their high specificity and low geometrical distortion, look promising for high-resolution brain mapping. Nevertheless, they suffer from lack of speed and sensitivity, leading them to be exploited mostly in high-field scanners. Radial acquisition can help with these inefficiencies ...

journal_title：Magnetic resonance imaging

authors： Malekian V,Rastegar F,Shafieizargar B,Nasiraei-Moghaddam A

更新日期：2020-12-01 00:00:00

abstract：:Percentage of lipid content of 22 adrenal cortex lesions and their water proton longitudinal relaxation time were measured in vitro at 60 MHz. Although water relaxation times obtained on benign and malignant samples overlap each other, measurements of the percentage of lipids performed on the same tissues allow us to ...

journal_title：Magnetic resonance imaging

authors： Leroy-Willig A,Roucayrol JC,Luton JP,Courtieu J,Niesenbaum N,Louvel A

更新日期：1987-01-01 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：:A quantitative analysis of the dependence of water proton relaxation on water content in randomly packed beds of Sephadex is undertaken. A combination of Osmotic and Capillary theory is used to describe the morphological changes occurring in the packed beds as the water content is lowered. At each water content the wa...

journal_title：Magnetic resonance imaging

authors： Hills BP,Babonneau F

更新日期：1994-01-01 00:00:00

abstract：PURPOSE:Visual review of individual spectra in magnetic resonance spectroscopic imaging (MRSI) data benefits from the application of spectral smoothing; however, if this processing step is applied prior to spectral analysis this can impact the accuracy of the quantitation. This study aims to analyze the effect of spect...

journal_title：Magnetic resonance imaging

authors： Goryawala M,Sullivan M,Maudsley AA

更新日期：2020-07-01 00:00:00

abstract：:The aim of the study was to evaluate the relationship between the presence of right ventricular abnormalities detected by cardiac magnetic resonance (CMR) and QRS dispersion, the strongest independent predictor of sudden death in ARVC. A consecutive series of 40 patients from a single institution were recruited with a...

journal_title：Magnetic resonance imaging

authors： Ma N,Cheng H,Lu M,Jiang S,Yin G,Zhao S

更新日期：2012-12-01 00:00:00

abstract：:Functional MR imaging of the alert, behaving monkey is being used more and more often to detect activation patterns and guide electrophysiological research investigating the neural basis of behavior. Several labs have reported fMRI data from the awake monkey, but none of them has studied and systematically corrected t...

journal_title：Magnetic resonance imaging

authors： Pfeuffer J,Shmuel A,Keliris GA,Steudel T,Merkle H,Logothetis NK

更新日期：2007-07-01 00:00:00

abstract：:Magnetic resonance imaging (MRI) is a completely noninvasive modality that has shown significant promise for the evaluation of the cardiovascular system. Our imaging technique employed electrocardiographic (ECG) gating, which resulted in well-resolved images of the cardiac structures. Patients and animals with a varie...

journal_title：Magnetic resonance imaging

authors： McNamara MT,Higgins CB

更新日期：1984-01-01 00:00:00

abstract：:Relaxation times estimation methods play a central role in various problems, such as magnetic resonance (MR) hardware calibration, tissue characterization, or temperature measurement. Previous studies have proposed optimization criteria to estimate the relaxation time T1 faster than with a multipoint method leading to...

journal_title：Magnetic resonance imaging

authors： Imran J,Langevin F,Saint-Jalmes H

更新日期：1999-11-01 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：OBJECTIVE:To investigate T2 mapping as a possible marker for low-grade human articular cartilage lesions during a one-year follow-up, possible changes during the follow-up and compare the reliability and sensitivity of these measurements on high-field (3 T) and ultra-high-field (7 T) MRI scanners. DESIGN:Twenty-one pa...

journal_title：Magnetic resonance imaging

authors： Juras V,Schreiner M,Laurent D,Zbýň Š,Mlynarik V,Szomolanyi P,Hager B,Scotti C,Goldhahn J,Heule R,Bieri O,Trattnig S

更新日期：2019-01-01 00:00:00

abstract：:Current density imaging (CDI) has been shown to be a feasible method to map spatial distribution of electric currents through bone structures and for studying osteoporosis and bone fracture models. For the osteoporosis model, bone sample was moistened in a solution of a sodium salt of ethylendiamintetraacetic acid (ED...

journal_title：Magnetic resonance imaging

authors： Beravs K,White D,Sersa I,Demsar F

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 nonhuman primate brain study provides important supplemental means for human brain exploration since the two species share close anatomical and functional similarities. MR diffusion tensor imaging (DTI) in human brain has revealed exquisite details of brain structures especially in the brain white matter. However,...

journal_title：Magnetic resonance imaging

authors： Liu X,Zhu T,Gu T,Zhong J

更新日期：2009-04-01 00:00:00

abstract：:In the present work, we reported a new nuclear Overhauser enhancement (NOE)-mediated magnetization transfer (MT) signal at around -1.6ppm (NOE(-1.6)) in rat brain and investigated its application in the detection of acute ischemic stroke in rodent model. Using continuous wave (CW) MT sequence, the NOE(-1.6) is reliabl...

journal_title：Magnetic resonance imaging

authors： Zhang XY,Wang F,Afzal A,Xu J,Gore JC,Gochberg DF,Zu Z

更新日期：2016-10-01 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：: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：:High density barium sulphate suspension was investigated as an oral contrast on MRI. On 30 consecutive subjects, the stomach (in all cases) and the two first portions of the duodenum (in 21 cases) were filled with the suspension. This oral contrast behaved as a negative contrast, being hypointense on all pulse sequenc...

journal_title：Magnetic resonance imaging

authors： Marti-Bonmati L,Vilar J,Paniagua JC,Talens A

更新日期：1991-01-01 00:00:00

abstract：:The HASTE (half-Fourier acquisition single-shot turbo spin-echo) technique delivers images with T2-weighting in about half a second and could be ideal for fast dynamic studies when T2-weighting is needed. We evaluated cardiac-triggered HASTE to study cervical spine flexion/extension. The cervical spines of ten asympto...

journal_title：Magnetic resonance imaging

authors： Duerinckx AJ,Yu WD,El-Saden S,Kim D,Wang JC,Sandhu HS

更新日期：1999-04-01 00:00:00

abstract：PURPOSE:To assess the value of semi-automated segmentation applied to diffusion MRI for predicting the therapeutic response of liver metastasis. METHODS:Conventional diffusion weighted magnetic resonance imaging (MRI) was performed using b-values of 0, 150, 300 and 450s/mm(2) at baseline and days 4, 11 and 39 followin...

journal_title：Magnetic resonance imaging

authors： Stephen RM,Jha AK,Roe DJ,Trouard TP,Galons JP,Kupinski MA,Frey G,Cui H,Squire S,Pagel MD,Rodriguez JJ,Gillies RJ,Stopeck AT

更新日期：2015-12-01 00:00:00