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Metabolic Rates in Small Brain Nuclei Determined by High-Resolution PET
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Identification of small nuclei in the brain by PET has been limited by the spatial resolution of conventional scanners. The new detector technology and advanced signal analysis of a high-resolution research tomograph (HRRT) has improved 3-dimensional spatial resolution to 2.2 mm at sufficient efficiency and permitted the quantification of tracer concentrations in small volumes. Methods: In 9 healthy volunteers, cerebral glucose metabolism was investigated after intravenous injection of 370 MBq of ^sup 18^F-FDG, and regional cerebral metabolic rates for glucose (rCMRGIc) were determined in ...
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The effects of transient attention on spatial resolution and the size of the attentional cue
; ...transient attention enhances spatial resolution, but is the effect of transient attention on spatial resolution modulated by the size of the...lead to a gradual decrement in spatial resolution? To test these hypotheses, we...
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Fabrication and Characterization of a 0.5-mm Lutetium Oxyorthosilicate Detector Array for High-Resolution PET Applications
; ...are other contributing factors, the spatial resolution in small-animal PET is still largely...half maximum (FWHM). The intrinsic spatial resolution was 0.68-mm FWHM as measured with...with ^sup 18^F. The improvement in spatial resolution in a tomographic setting is demonstrated...
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; ...nuclei that remain neglected by the spatial resolution of conventional scanners. However...the gain induced by the increased spatial resolution in comparison with conventional PET...striatum with both scanners at the same spatial resolution (smoothed HRRT images) exhibited...
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Metabolism of Pelagic Cephalopods as a Function of Habitat Depth: A Reanalysis Using Phylogenetically Independent Contrasts.(Statistical Data Included)
; ...SEIBEL [1][*] DAVID B. CARLINI [2] Metabolic rates of deep-living animals have been intensely...Their hypothesis states that reduced metabolic rates among many deep-sea pelagic taxonomic...has, however, been tested using mean metabolic rates for species as individual data points...
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Three-dimensional imaging characteristics of the HEAD PENN-PET scanner
; ...high performance, specifically in spatial resolution and sensitivity. The scanner is unique...measurements are performed to determine spatial resolution over the scanner FOV, and cylindrical...reconstruction algorithms. Results: The system spatial resolution is measured to be 3.5 mm ...
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Performance evaluation of microPET: A high-resolution lutetium oxyorthosilicate PET scanner for animal imaging
; ...provide a compact system with superior spatial resolution at a fraction of the cost of a clinical...oxyorthosilicate (LSO) crystals to achieve high spatial resolution. Each microPET detector consists...three-dimensional filtered backprojection show a spatial resolution of 1.8 mm at ...
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Thermally and Dynamically Induced Pressure Features over Complex Terrain from High-Resolution Analyses
; ...It tried to combine both the high spatial resolution provided by the VERA scheme that...climatologically. Using high temporal and spatial resolution, the authors were able to investigate...are produced either under increased spatial resolution with low temporal resolution or highly...
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Geostatistical prediction and simulation of point values from areal data.
; ...outputs operating at a fine spatial resolution because of uncertain input...parameters inferred from coarser spatial resolution data. Alternatively, such...the coarser (pixel-level) spatial resolution. ********** Introduction...
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Longevity and Metabolism in Drosophila melanogaster: Genetic Correlations Between Life Span and Age-Specific Metabolic Rate in Populations Artificially Selected for Long Life
; ABSTRACT We measured age-specific metabolic rates in 2861 individual Drosophila melanogaster...artificially selected for long life, resting metabolic rates were measured at 5, 16, 29, and 47...variation between lines in age-specific metabolic rates, evidence for genotype age ...
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Multiview Cloud-Top Height and Wind Retrieval with Photogrammetric Methods: Application to Meteosat-8 HRV Observations
; ...effects of the geolocation, spatial resolution, satellite position, and...acquisition-time difference and spatial resolution. As a result, there is only...marginal benefit from the good spatial resolution offered by the Meteosat...
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