Archive for the ‘for26cat’ Category
Saturday, June 28th, 2008
Pelvic imaging using a t1w fat-suppressed three-dimensional dual echo dixon technique at 3T.
PURPOSE: To compare two T1-weighted (T1W) fat-suppressed sequences for 3D breath-hold pre- and postcontrast fat-suppressed T1W imaging of the female pelvis at 3T. MATERIALS AND METHODS: Pelvic MRI scans of 16 female patients ...
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Saturday, June 28th, 2008
Dynamic contrast-enhanced magnetic resonance imaging: A useful tool for characterizing ovarian epithelial tumors.
PURPOSE: To evaluate the utility of dynamic contrast enhancement (DCE) MRI for distinguishing among benign, borderline and invasive epithelial ovarian tumors. MATERIALS AND METHODS: We analyzed preoperative MRI studies of 37 patients with ...
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Saturday, June 28th, 2008
Apparent wall thickening of cystic renal lesions on MRI.
PURPOSE: To show that cystic renal lesions that would otherwise meet criteria for simple cysts can demonstrate perceptible walls or increased wall thickness on MRI, sometimes causing these lesions to be \"upgraded.\" It was hypothesized that thickening ...
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Saturday, June 28th, 2008
Fast and optimized T(1) mapping technique for the noninvasive quantification of gastric secretion.
PURPOSE: To evaluate the noninvasive quantification of gastric secretion volume after administration of a labeled viscous glucose solution by fast T(1) mapping. MATERIALS AND METHODS: T(1) values of a series of labeled and ...
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Saturday, June 28th, 2008
Multiresolution field map estimation using golden section search for water-fat separation.
Many diagnostic MRI sequences demand reliable and uniform fat suppression. Multipoint water-fat separation methods, which are based on chemical-shift induced phase differences, have shown great success in the presence of field inhomogeneities. This work presents ...
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Saturday, June 28th, 2008
Contrast-enhanced magnetic resonance angiography in peripheral arterial disease: Improving image quality by automated image registration.
In peripheral arterial disease, contrast-enhanced MR angiography (MRA) is a noninvasive imaging alternative for catheter-based digital subtraction angiography (DSA). In DSA, final images are generated by subtracting a native mask image ...
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Saturday, June 28th, 2008
Visualizing water clearance in the lung with MRI.
Current indirect measurements of alveolar fluid clearance (AFC) suggest that the rate of fluid clearance correlates with morbidity and mortality in patients with pulmonary edema. In a traditional AFC-measurement, fluid laced with a tracer macromolecule is instilled into ...
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Saturday, June 28th, 2008
T(2) and T(2) (*) quantification using optimal B(1) image reconstruction for multicoil arrays.
PURPOSE: To investigate the accuracy of low signal-to-noise ratio (SNR) T(2) and T(2) (*) measurements using array coils and optimal B(1) image reconstruction (OBR) compared to the standard root sum of squares (RSS) ...
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Saturday, June 28th, 2008
Effects of intravenous gadolinium administration and flip angle on the assessment of liver fat signal fraction with opposed-phase and in-phase imaging.
PURPOSE: To assess the effects of intravenous gadolinium (Gd) and flip angle (FA) on liver fat quantification by opposed-phase (OP) and in-phase (IP) imaging. MATERIALS ...
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Saturday, June 28th, 2008
Conspicuity of zones of ablation after radiofrequency ablation in porcine livers: Comparison of an extracellular and an SPIO contrast agent.
PURPOSE: To compare conspicuity of zones of ablation on nonenhanced, gadopentetate dimeglumine-(Gd-DTPA) and ferucarbotran-(SPIO)-enhanced magnetic resonance (MR) images. MATERIALS AND METHODS: In all, 33 radiofrequency ablations ...
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Saturday, June 28th, 2008
New L-Dopa Codrugs as Potential Antiparkinson Agents.
This paper reports the synthesis and preliminary evaluation of new L-dopa (LD) conjugates (1 and 2) obtained by joining LD with two different natural antioxidants, caffeic acid and carnosine, respectively. The antioxidant efficacy of compounds 1 and 2 was ...
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Saturday, June 28th, 2008
Reducing morphological variability of the cervical carotid artery in serial magnetic resonance imaging using a head and neck immobilization device.
PURPOSE: To evaluate how well a head and neck immobilization device performed in reducing lumen morphology variability in repeated MR imaging of the carotid artery. MATERIALS ...
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Saturday, June 28th, 2008
T2- and diffusion-maps reveal diurnal changes of intervertebral disc composition: An in vivo MRI study at 1.5 Tesla.
PURPOSE: To investigate the lumbar intervertebral discs (IVDs) by MRI in the morning and evening after a diurnal load cycle. Changes in MR characteristics (T2-weighted imaging, T2- and ...
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Saturday, June 28th, 2008
Manganese-enhanced MRI of the mouse auditory pathway.
Functional mapping of the lateral lemniscus and the superior olivary complex as part of the auditory pathway was accomplished for the first time in mice in vivo using manganese-enhanced MRI (2.35T, 3D FLASH, 117 mum isotropic resolution). These and ...
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Saturday, June 28th, 2008
In vitro investigation of poor cerebrospinal fluid suppression on fluid-attenuated inversion recovery images in the presence of a gadolinium-based contrast agent.
Cerebrospinal fluid (CSF) enhancement on fluid-attenuated inversion recovery (FLAIR) images obtained post-gadolinium (Gd)-based agent injection is described in stroke and multiple sclerosis. Blood brain barrier ...
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Saturday, June 28th, 2008
Measurement of T(1) and T(2) in the cervical spinal cord at 3 tesla.
T(1) and T(2) were measured for white matter (WM) and gray matter (GM) in the human cervical spinal cord at 3T. T(1) values were calculated using an inversion-recovery (IR) and B(1)-corrected double flip ...
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Saturday, June 28th, 2008
Chronic hepatitis: Role of diffusion-weighted imaging and diffusion tensor imaging for the diagnosis of liver fibrosis and inflammation.
PURPOSE: To determine the diagnostic performance of liver apparent diffusion coefficient (ADC) measured with conventional diffusion-weighted imaging (CDI) and diffusion tensor imaging (DTI) for the diagnosis of liver ...
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Saturday, June 28th, 2008
Assessment of the lung microstructure in patients with asthma using hyperpolarized (3)He diffusion MRI at two time scales: Comparison with healthy subjects and patients with COPD.
PURPOSE: To investigate short- and long-time-scale (3)He diffusion in asthma. MATERIALS AND METHODS: A hybrid MRI sequence was developed to ...
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Saturday, June 28th, 2008
Enzyme-Entrapping behaviors in alginate fibers and their papers.
Enzyme immobilization in the form of fiber and paper was easily achieved by wet spinning of aqueous admixture of sodium alginate and enzymes into divalent metallic ion solution as a coagulating bath, followed by paper making of resultant ...
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Saturday, June 28th, 2008
Immobilization of microorganisms by adhesion: Interplay of electrostatic and nonelectrostatic interactions.
The adhesion of three microorganisms (Saccharomyces cerevisiae, Acetobacter aceti, and Moniliella pollinis) to different materials has been studied using various supports (glass, metals, plastics), some of which were treated by an Fe(III) solution. The surface ...
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Saturday, June 28th, 2008
Reaction rate calculations for cosubstrates diffusing into catalyst layer from opposite sides.
The effects of diffusion on a reaction taking place in a permeable catalyst are examined theoretically for the case where the reaction has two substrates supplied from opposite sides of a catalytic slab. The ...
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Saturday, June 28th, 2008
Performance evaluation of ethanol fermentor systems using a vector-valued objective function.
It is shown that the performance evaluation using a vector-valued objection function whose components are the product productivity, the product concentration, and the substrate conversion is quite useful in getting deeper insight into the development ...
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Saturday, June 28th, 2008
Dynamics of chemostat in which one microbial population grows on multiple complementary nutrients.
The equations of a chemostat in which one microbial population grows on multiple rate-limiting nutrients are formulated. The dynamics of a chemostat involving growth on complementary nutrients is studied through stability analysis of ...
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Saturday, June 28th, 2008
Dynamics of a biological fixed film for phenol degradation in a fluidized-bed bioreactor.
Experimental and modeling studies were conducted to analyze the dynamic response behavior of a phenol-oxidizing fixed film using a differential, fluidized-bed bioreactor in a recycle loop with a well-mixed reservoir. With the bioreactor ...
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Saturday, June 28th, 2008
A mathematical model for prediction of plasmid copy number and genetic stability in Escherichia coli.
The design of bioreactors for genetically modified bacterial cultures would benefit from predictive models. Of particular importance is the interaction of the external environment, cell physiology, and control of plasmid copy ...
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