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13 rezultatima

Effect of b value on contrast during diffusion-weighted magnetic resonance imaging assessment of acute ischemic stroke.

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OBJECTIVE To examine the effect of varying the diffusion encoding strength (b value) on the contrast (signal difference, Delta S) between damaged and normal tissue during diffusion-weighted magnetic resonance imaging (DWI) assessment of acute ischemic stroke. METHODS Phantoms with diffusion values

Technical Note: Thermoacoustic imaging of hemorrhagic stroke: A feasibility study with a human skull.

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OBJECTIVE To study the possibility of thermoacoustic imaging (TAI) toward hemorrhagic stroke detection. METHODS A single-transducer circular-scanning TAI system was used for data collection. An agar powder-based, tissue-mimicking phantom enclosed by a human skull was applied to simulate the brain

Inverse Z-spectrum analysis for spillover-, MT-, and T1 -corrected steady-state pulsed CEST-MRI--application to pH-weighted MRI of acute stroke.

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Endogenous chemical exchange saturation transfer (CEST) effects are always diluted by competing effects, such as direct water proton saturation (spillover) and semi-solid macromolecular magnetization transfer (MT). This leads to unwanted T2 and MT signal contributions that lessen the CEST signal

Multi-angle ratiometric approach to measure chemical exchange in amide proton transfer imaging.

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Amide proton transfer imaging, a specific form of chemical exchange saturation transfer imaging, has previously been applied to studies of acute ischemic acidosis, stroke, and cancer. However, interpreting the resulting contrast is complicated by its dependence on the exchange rate between amides

Quantitative regional brain water measurement with magnetic resonance imaging in a focal ischemia model.

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Therapeutic approaches to cerebral edema require an understanding of both the magnitude and location of changes in brain water content. It is desirable to have a sensitive, accurate means of measuring brain water noninvasively so that effective therapies for cerebral edema in stroke, head trauma,

Hemoglobin S/O(Arab): thirteen new cases and review of the literature.

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Hemoglobin S/O(Arab) (Hb S/O(Arab)) is a rare compound heterozygous hemoglobinopathy characterized by the presence of two variant beta-globin chains: beta6Glu --> Val (Hb S) and beta121Glu --> Lys (Hb O(Arab)). The diagnosis of Hb S/O(Arab) requires electrophoresis on both cellulose acetate and

Progressive central and peripheral demyelinating disease of adult onset in a Norwegian family.

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OBJECTIVE To describe the clinical features of a Norwegian family with a combined central and peripheral demyelinating disease. METHODS Multiple case report. METHODS Three generations of a Norwegian family. Medical records were available for all 9 members of the second generation and 5 affected

Fold-Over Oversampling Effects in the Measurements of Cerebral Cerebrospinal Fluid and Blood Flows with 2D Cine Phase-Contrast MRI

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This prospective study investigated the effects of fold-over oversampling on phase-offset background errors with 2D-Cine phase contrast (Cine-PC) magnetic resonance imaging (MRI). It was performed on brain MRI and compared to conventional Full-field of view FOV coverage and it was tested with two

Evaluation of laser bacterial anti-fouling of transparent nanocrystalline yttria-stabilized-zirconia cranial implant.

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The development and feasibility of a novel nanocrystalline yttria-stabilized-zirconia (nc-YSZ) cranial implant has been recently established. The purpose of what we now call "window to the brain (WttB)" implant (or platform), is to improve patient care by providing a technique for delivery and/or

Distributions of brine and bacteria in beef primal cuts injected with brine without, or before or after mechanical tenderizing.

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Eye of round primal cuts of beef were injected with brines containing a dye and Listeria innocua. The amounts of brine in portions of meat were determined from the concentrations of dye in the tissues, and the numbers of L. innocua in the tissues were determined from the numbers of colonies

[Antimicrobial activity and interaction with DNA of medicinal plants from the Peruvian Amazon region].

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Decoctions of four plants used for the treatment of different infections by indigenous groups of the Peruvian Amazon, i.e. Abuta grandifolia, Cyperus articulatus, Gnaphalium spicatum and Pothomorphe peltata were evaluated for antimicrobial activity by the "stroke method" in agar plates. Tested

Oral colonisation by antimicrobial-resistant Gram-negative bacteria among long-term care facility residents: prevalence, risk factors, and molecular epidemiology.

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For residents of long-term care facilities (LTCFs), antimicrobial-resistant bacteria (ARB) are a risk factor, yet their oral colonisation, potentially leading to aspiration pneumonia, remains unclear. This study was undertaken to survey the prevalence, phenotypic characteristics, and

Coherent directed movement toward food modeled in Trichoplax, a ciliated animal lacking a nervous system.

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Trichoplax adhaerens is a small, ciliated marine animal that glides on surfaces grazing upon algae, which it digests externally. It has no muscles or nervous system and only six cell types, all but two of which are embedded in its epithelium. The epithelial cells are joined by apical adherens

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