MRI of a retained sponge in a dog.

abstract：:Manganese-dipyridoxal diphosphate (Mn-DPDP) is a liver-selective contrast agent selectively taken up by the hepatocytes. Because of the analogy of structure with pyridoxine (vitamin B6), it was previously suggested that this compound can be selectively taken up by the facilitated transport of vitamers B6. To understan...

journal_title：Magnetic resonance imaging

authors： Gallez B,Baudelet C,Adline J,Charbon V,Lambert DM

更新日期：1996-01-01 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：:Multiparametric MRI is a remarkable imaging method for the assessment of patho-physiological processes. In particular, brain tumor characterization has taken advantage of the development of advanced techniques such as Diffusion- (DWI) and Perfusion- (PWI) Weighted Imaging, but a thorough analysis of meningiomas is sti...

journal_title：Magnetic resonance imaging

authors： Zampini MA,Buizza G,Paganelli C,Fontana G,D'Ippolito E,Valvo F,Preda L,Baroni G

更新日期：2020-04-01 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：:Blood oxygenation level-dependent (BOLD) functional magnetic resonance imaging (fMRI) is currently the dominant technique for non-invasive investigation of brain functions. One of the challenges with BOLD fMRI, particularly at high fields, is compensation for the effects of spatiotemporally varying magnetic field inho...

journal_title：Magnetic resonance imaging

authors： Barry RL,Williams JM,Klassen LM,Gallivan JP,Culham JC,Menon RS

更新日期：2010-02-01 00:00:00

abstract：:We have applied diffusion and relaxation Nuclear Magnetic Resonance experiments to investigate the translational and rotational mobility of adsorbents on quartz and calcite mineral surfaces. On both surfaces it was found that water is the dominant molecule. On the quartz surface the majority of water molecules have a ...

journal_title：Magnetic resonance imaging

authors： Sørgård HN,Totland C,Nerdal W,Seland JG

更新日期：2019-02-01 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：:The subthalamic nucleus (STN) is one of the most common stimulation targets for treating Parkinson's disease using deep brain stimulation (DBS). This procedure requires precise placement of the stimulating electrode. Common practice of DBS implantation utilizes microelectrode recording to locate the sites with the cor...

journal_title：Magnetic resonance imaging

authors： Xiao Y,Beriault S,Pike GB,Collins DL

更新日期：2012-06-01 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：:A new method for generating diffusion contrast in magnetic resonance imaging is presented. This technique is robust enough to allow implementation on conventional imaging systems without hardware modifications. Results from phantom measurements are reported. Qualitative contrast changes in magnetic resonance images de...

journal_title：Magnetic resonance imaging

authors： Norwood TJ,Williams SC

更新日期：1993-01-01 00:00:00

abstract：:A 31-year-old male patient had a transjugular intrahepatic portal systemic shunt (TIPS) placed for acute Budd-Chiari syndrome secondary to paroxysmal nocturnal hemoglobinuria (PNH). Post-procedure, he was anticoagulated for his underlying paroxysmal nocturnal hemoglobinuria. After 11 days, he complained of upper abdom...

journal_title：Magnetic resonance imaging

authors： Hasegawa S,Eisenberg LB,Semelka RC

更新日期：1998-09-01 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：:Hippocampal metabolite concentrations were determined by localized in vivo proton magnetic resonance spectroscopy (1H MRS) in eleven patients suffering from refractory mesial temporal lobe epilepsy (MTLE), as well as in eleven age-matched healthy volunteers, and compared with patient history, postoperative outcome and...

journal_title：Magnetic resonance imaging

authors： Duc CO,Trabesinger AH,Weber OM,Meier D,Walder M,Wieser HG,Boesiger P

更新日期：1998-10-01 00:00:00

abstract：:Glycosaminoglycan Chemical Exchange Saturation Transfer (gagCEST) is an important molecular MRI methodology developed to assess changes in cartilage GAG concentrations. The correction for B0 field inhomogeneity is technically crucial in gagCEST imaging. This study evaluates the accuracy of the B0 estimation determined...

journal_title：Magnetic resonance imaging

authors： Wei W,Jia G,Flanigan D,Zhou J,Knopp MV

更新日期：2014-01-01 00:00:00

abstract：:Biliary cystadenomas and their malignant counterparts, biliary cystadenocarcinomas, are rare cystic tumors that arise from hepatobiliary epithelium. Ultrasound (US) and computed tomography (CT) are the initial imaging modalities used for the evaluation of biliary cystic tumors, but are not specific. MRI and MRCP, beca...

journal_title：Magnetic resonance imaging

authors： Williams DM,Vitellas KM,Sheafor D

更新日期：2001-11-01 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：:Pulsed field gradient (PFG) nuclear magnetic resonance (NMR) and microimaging experiments have been performed to study the diffusion of liquid alkanes into a variety of semicrystalline polyethylene (PE) samples. The results highlight the importance of the crystalline phase in controlling the diffusion process in terms...

journal_title：Magnetic resonance imaging

authors： Harding SG,Gladden LF

更新日期：1998-06-01 00:00:00

abstract：:The hippocampal formation possesses an important role in the development and maintenance of short-term memory. In this study, magnetic resonance imaging (MRI) and gross histology were used to quantify the volume of the hippocampal formation in canines. High resolution MRI, using 1 mm thick slices and an intraplanar re...

journal_title：Magnetic resonance imaging

authors： Vullo T,Deo-Narine V,Stallmeyer MJ,Gomez DG,Cahill PT

更新日期：1996-01-01 00:00:00

abstract：:To establish the quantitative MR diagnostic criteria for discoid lateral meniscus, MR imaging of 60 knees with arthroscopically confirmed discoid lateral menisci and 134 knees with semilunar lateral menisci were analyzed. Following four quantitative parameters were measured. (1) Meniscal width (MW): The minimum menisc...

journal_title：Magnetic resonance imaging

authors： Samoto N,Kozuma M,Tokuhisa T,Kobayashi K

更新日期：2002-01-01 00:00:00

abstract：:Truncation artifacts arise in magnetic resonance spectroscopic imaging (MRSI) of the human brain due to limited coverage of k-space necessitated by low SNR of metabolite signal and limited scanning time. In proton MRSI of the head, intense extra-cranial lipid signals "bleed" into brain regions, thereby contaminating s...

journal_title：Magnetic resonance imaging

authors： Sarkar S,Heberlein K,Hu X

更新日期：2002-12-01 00:00:00

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：:Current fast imaging techniques are based on gradient echo sequences with reduced flip angle excitation pulses and very short repetition times TR. Practical T2 values may be of the order of TR or longer. In this situation, a different image contrast can be obtained, depending on details of the sequence. Four essential...

journal_title：Magnetic resonance imaging

authors： van der Meulen P,Groen JP,Tinus AM,Bruntink G

更新日期：1988-07-01 00:00:00

abstract：:Quantitative cerebral blood flow (CBF) values can be determined from residue function estimates obtained from magnetic resonance dynamic susceptibility contrast (DSC) perfusion studies using a variety of deconvolution approaches. However, there are significant differences between the CBF estimates obtained, difference...

journal_title：Magnetic resonance imaging

authors： Salluzzi M,Frayne R,Smith MR

更新日期：2005-04-01 00:00:00

abstract：:This study describes the appearance of Brenner tumors on MR imaging and compares quantitative signal intensity measurements of Brenner tumors with that of other ovarian tumors. A search of pathologic and MR records disclosed patients who had MRIs showing Brenner tumors prior to surgical excision. Patients (21) with ot...

journal_title：Magnetic resonance imaging

authors： Outwater EK,Siegelman ES,Kim B,Chiowanich P,Blasbalg R,Kilger A

更新日期：1998-12-01 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：:The value of NMR spectrometry as a way to understand the porosity and permeability of rocks is well documented. Other more esoteric parameters, such as restrictive diffusion, grain size distribution, and fluid viscosities have received less notice but are also available from the NMR measurements as laboratory studies ...

journal_title：Magnetic resonance imaging

authors： Taicher Z,Coates G,Gitartz Y,Berman L

更新日期：1994-01-01 00:00:00

abstract：:The purpose of this study was to assess the benefits of a 3 T scanner and an eight-channel phased-array head coil for acquiring three-dimensional PRESS (Point REsolved Spectral Selection) proton (H-1) magnetic resonance spectroscopic imaging (MRSI) data from the brains of volunteers and patients with brain tumors rela...

journal_title：Magnetic resonance imaging

authors： Li Y,Osorio JA,Ozturk-Isik E,Chen AP,Xu D,Crane JC,Cha S,Chang S,Berger MS,Vigneron DB,Nelson SJ

更新日期：2006-12-01 00:00:00

abstract：:In vivo proton and phosphorus magnetic resonance spectroscopy (MRS) studies were performed at 1.5 T on two patients (siblings) diagnosed as having a mitochondrial cytopathy. The clinical diagnosis was based on a complete battery of biochemical tests, electron microscopy and modified Gomori trichrome stain studies of m...

journal_title：Magnetic resonance imaging

authors： Narayana PA,Slopis JM,Jackson EF,Hazle JD,Kulkarni MV,Butler IJ

更新日期：1989-03-01 00:00:00

abstract：:With the conventional 3D MR angiographic sequences, it is difficult to prescribe multiple phases in different orientations, though multiple phases may be prescribed in the same orientation as the initial scan. Magnetic resonance angiography (MRA) was performed in which three slabs were prescribed in different orientat...

journal_title：Magnetic resonance imaging

authors： Shetty AN,Bis KG

更新日期：1999-07-01 00:00:00

abstract：:Today, patients with alveolar rhabdomyosarcoma have a favorable prognosis with a survival rate of more than 80%, due to modern radiotherapy. However, those patients with secondary meningeal involvement are still afflicted with a mortality rate of 90% unless a different therapeutic approach is taken. We report a case o...

journal_title：Magnetic resonance imaging

authors： Judmaier W,Birbamer G,Buchberger W,Mihatsch T,Lener M,Felber S

更新日期：1993-01-01 00:00:00