Area of paradoxical signal drop after the administration of superparamagnetic iron oxide on the T2-weighted image of a patient with lymphangitic metastasis of the liver.

abstract：:Noninvasive cognitive neuroimaging studies based on functional magnetic resonance imaging (fMRI) are of ever-increasing importance for basic and clinical neurosciences. The explanatory power of fMRI could be greatly expanded, however, if the pattern of the neuronal circuitry underlying functional activation could be m...

journal_title：Magnetic resonance imaging

authors： Kim DS,Kim M,Ronen I,Formisano E,Kim KH,Ugurbil K,Mori S,Goebel R

更新日期：2003-12-01 00:00:00

abstract：:Systems investigated with NMR spectroscopy are sometimes heterogeneous with respect to chemical composition, rates of chemical exchange, and other properties influencing magnetic resonance parameters. A method was developed to spatially encode reaction kinetic information and produce NMR images sensitive to chemical e...

journal_title：Magnetic resonance imaging

authors： McFarland EW,Neuringer LJ,Kushmerick MJ

更新日期：1988-09-01 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

abstract：:Qualitative and quantitative proton magnetic resonance imaging techniques were applied to persimmon (Diospyros kaki cv 'Fuyu') fruit during development and post-harvest ripening. Spin-lattice (T(1)) relaxation times in mesocarp parenchyma and vascular tissue exhibited a sigmoidal pattern of increase leading to commerc...

journal_title：Magnetic resonance imaging

authors： Clark CJ,MacFall JS

更新日期：2003-07-01 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 parametric method is proposed to examine the relationship between neuronal activity, measured with event related potentials (ERPs), and the hemodynamic response, observed with functional magnetic resonance imaging (fMRI), during an auditory oddball paradigm. After verifying that the amplitude of the evoked response ...

journal_title：Magnetic resonance imaging

authors： Horovitz SG,Skudlarski P,Gore JC

更新日期：2002-05-01 00:00:00

abstract：PURPOSE:To evaluate the correlation between the pancreatic exocrine insufficiency estimated by cine-dynamic MRCP using spatially selective IR pulse and the severity stages (modified Cambridge classification) based on morphological changes of the pancreatic duct in patients with suspected chronic pancreatitis. MATERIAL...

journal_title：Magnetic resonance imaging

authors： Yasokawa K,Ito K,Kanki A,Yamamoto A,Torigoe T,Sato T,Tamada T

更新日期：2018-05-01 00:00:00

abstract：PURPOSE:To develop a technique for three dimensional (3D) high resolution joint imaging of intracranial and extracranial arterial walls with improved cerebrospinal fluid (CSF) suppression and good blood suppression based on T1 weighted sampling perfection with application optimized contrast using different angle evolut...

journal_title：Magnetic resonance imaging

authors： Zhang L,Zhang N,Wu J,Liu X,Chung YC

更新日期：2017-12-01 00:00:00

abstract：:The quantitative determination of flow velocities using inflow-outflow techniques require slice selective excitation pulses. The intensity-velocity relationship for such methods is shown to be such that flow velocities estimated using techniques which rely on an absolute calibration of the measured intensity are sensi...

journal_title：Magnetic resonance imaging

authors： Saloner D

更新日期：1989-01-01 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：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：:To assess whether magnetic resonance imaging could assist in diagnosing Ewing sarcoma, we retrospectively analyzed T1- and T2-weighted images of 24 consecutive solitary lytic bone lesions, including 18 cases of histologically proven Ewing sarcoma, and six aggressive-appearing benign lesions including eosinophilic gran...

journal_title：Magnetic resonance imaging

authors： Hanna SL,Fletcher BD,Kaste SC,Fairclough DL,Parham DM

更新日期：1994-01-01 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：: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：: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:Our study aimed to develop accelerated microscopic diffusional kurtosis imaging (μDKI) and preliminarily evaluated it in a rodent model of chronic epilepsy. METHODS:We investigated two μDKI acceleration schemes of reduced sampling density and angular range in a phantom and wild-type rats, and further tested μD...

journal_title：Magnetic resonance imaging

authors： Ji Y,Lu D,Wu L,Qiu B,Song YQ,Sun PZ

更新日期：2019-02-01 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：PURPOSE:In this study we proposed a fully automated method for localizing and segmenting the ascending aortic lumen with phase-contrast magnetic resonance imaging (PC-MRI). MATERIAL AND METHODS:Twenty-five phase-contrast series were randomly selected out of a large population dataset of patients whose cardiac MRI exam...

journal_title：Magnetic resonance imaging

authors： Codari M,Scarabello M,Secchi F,Sforza C,Baselli G,Sardanelli F

更新日期：2018-04-01 00:00:00

abstract：:Relaxation time measurements were carried out during the preacute stage of lesion progression in an animal model of demyelination created in the internal capsule (ic) area of the rat brain using lysophosphatidyl choline (LPC). T1 and T2 were determined both before and after 36 h of lesion creation. Histology carried o...

journal_title：Magnetic resonance imaging

authors： Degaonkar MN,Raghunathan P,Jayasundar R,Jagannathan NR

更新日期：2005-01-01 00:00:00

abstract：:An NMR technique is described which allows the observation of ionic charge carriers moving in the electric field within a porous system saturated with electrolyte solution. This method, which was recently developed in our laboratory, gives experimental access to the study of electric transport in disordered media on a...

journal_title：Magnetic resonance imaging

authors： Holz M,Heil SR,Schwab IA

更新日期：2001-04-01 00:00:00

abstract：:Transverse relaxation rates for Carr-Purcell-Meiboom-Gill (CPMG) sequences increase with inter-echo time in presence of microscopic magnetic field inhomogeneities due to nuclear spin diffusion. For a weak field approximation that includes diffusion effects, the CPMG relaxation rate shift for proton diffusion around ca...

journal_title：Magnetic resonance imaging

authors： Kurz FT,Kampf T,Buschle LR,Heiland S,Schlemmer HP,Bendszus M,Ziener CH

更新日期：2016-09-01 00:00:00

abstract：:High-resolution, single-slice, high spatial and spectral resolution (HiSS) breast magnetic resonance imaging (MRI) provides improved lesion conspicuity, margin definition and internal definition, as compared to conventional clinical MRI - and thus may provide better lesion characterization and increase breast MRI spec...

journal_title：Magnetic resonance imaging

authors： Medved M,Newstead GM,Abe H,Olopade OI,Shimauchi A,Zamora MA,Karczmar GS

更新日期：2010-01-01 00:00:00

abstract：PURPOSE:The purpose was to validate diffusion-weighted imaging (DWI) in the assessment of hepatic metastases compared with superparamagnetic iron oxide (SPIO)-enhanced magnetic resonance imaging. MATERIALS AND METHODS:For 21 consecutive patients with 160 metastases from extrahepatic malignancy and 25 benign focal lesi...

journal_title：Magnetic resonance imaging

authors： Kim H,Yu JS,Cho ES,Chung JJ,Kim JH,Kim DJ,Ahn JH,Kim KW

更新日期：2012-05-01 00:00:00

abstract：:Dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI) is often used to examine vascular function in malignant tumors and noninvasively monitor drug efficacy of antivascular therapies in clinical studies. However, complex numerical methods used to derive tumor physiological properties from DCE-MRI images can b...

journal_title：Magnetic resonance imaging

authors： Hsu YH,Ferl GZ,Ng CM

更新日期：2013-05-01 00:00:00

abstract：:Metabolic imaging of hyperpolarized [1-(13)C] pyruvate co-polarized with [(13)C]urea by dynamic nuclear polarization with rapid dissolution is a promising new method for assessing tumor metabolism and perfusion simultaneously in vivo. Novel pulse sequences are required to enable dynamic imaging of multiple (13)C spect...

journal_title：Magnetic resonance imaging

authors： von Morze C,Sukumar S,Reed GD,Larson PE,Bok RA,Kurhanewicz J,Vigneron DB

更新日期：2013-02-01 00:00:00

abstract：:The amplitudes of gradient-echoes produced using static field gradients are sensitive to diffusion of tissue water during the echo evolution time. Gradient-echoes have been used to produce MR images in which image intensity is proportional to the self-diffusion coefficient of water. However, such measurements are subj...

journal_title：Magnetic resonance imaging

authors： Karczmar G,River J,Koretsky AP

更新日期：1995-01-01 00:00:00

abstract：:The proton spin-lattice relaxation measured at several frequencies leads to a resolved distribution of four Tli for reactive powder concrete (RPC). The typical Tli frequency dependences are quantitatively interpreted by a biphasic fast exchange model and a proton nuclear relaxation of hydrated paramagnetic ions at the...

journal_title：Magnetic resonance imaging

authors： Philippot S,Korb JP,Petit D,Zanni H

更新日期：1998-06-01 00:00:00

abstract：:Fast gradient echo sequences, such as echo planer imaging (EPI) and spiral imaging, are vulnerable to artifacts resulting from B(0) inhomogeneities. A major contribution to these artifacts is the susceptibility variation across the head, which is most severe in regions adjacent to air-tissue interfaces, such as the mo...

journal_title：Magnetic resonance imaging

authors： Neufeld A,Assaf Y,Graif M,Hendler T,Navon G

更新日期：2005-11-01 00:00:00

abstract：:Retained sponges after laparotomy may cause a broad spectrum of clinical symptoms and present a difficult diagnostic problem. We report a case of retained surgical sponge in a dog to illustrate the MRI findings of this infrequent but important cause of postoperative complications. ...

journal_title：Magnetic resonance imaging

authors： Terrier F,Revel D,Hricak H,Feduska N

更新日期：1985-01-01 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