Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 75 for “"CNR"”.
-
Quantitative Characterization of Conserved Noncoding Regions by Flow Cytometry
… promoter. Conservation of a noncoding region (CNR) across divergent species may indicate a regulatory region critical to basic morphogenesis. CNR-green fluorescent protein (GFP) constructs can demonstrate spatial and temporal CNR activity by microscopy visualization. However, characterization …
-
Characterisation of neural progenitors from the adult retina and ciliary epithelium
The mammalian central neural retina (CNR) lacks the capability to regenerate, a phenomenon retained by lower vertebrates. However, retinal stem cells have been isolated from the ciliary epithelium of the mammalian retina. Chx10 is a paired-like homeobox transcription factor gene expressed in the …
-
Quantifying Neuromelanin Content Across Varying Magnetic Field Strengths: A Comparative Analysis
… in the form of Contrast to Noise Ratio (CNR). Spearman’s rank order correlations assessed statistical dependence between the ranking of participant CNR values at 3T and 7T. We found that CNR values at 3T predicted those at 7T when standard deviation (as opposed to the mean) of the …
-
Mapping Myocardial Elasticity with Intracardiac Acoustic Radiation Force Impulse Methods
… alternately the tightest resolution (0.3 mm at CNR = 3.5 for a 0.17 mm filter) and highest CNR (8.5 with edge width = 0.7 mm for a 0.66 mm filter) of the modalities, followed by ARFI and then MTL-SWEI.</p><p>In larger, 6 mm targets, the CNR-resolution tradeoff curves for ARFI and STL-SWEI …
-
Backscatter Spatial Coherence for Ultrasonic Image Quality Characterization: Theory and Applications
… metrics of contrast and contrast-to-noise ratio (CNR). Simulation studies were performed to validate this theory and compare the variability of LOC to that of conventional metrics. In addition, matched measurements of LOC, contrast, CNR, and temporal correlation were obtained from harmonic phantom …
-
A Scheme for Ultra-Fast Computed Tomography Based on Stationary Multi-Beam X-ray Sources
… demonstrated comparable contrast-noise-ratio (CNR) and image structural similarity to the standard global CT mode, while inducing a significant radiation dose reduction (< 83.9%). Second, the data acquisition of multi-source interior CT was demonstrated at clinical geometry, via numerical …
-
Compuestos luminiscentes cicloplatinados con propiedades multifuncionales
… de complejos de tipo cloro/isocianuro [Pt(C^N)Cl(CNR)] (R = Xyl y tBu) y la alquinilación de estos sustratos para obtener compuestos de tipo acetiluro/isocianuro [Pt(C^N)(C≡CR’)(CNR)]. La variación de los ligandos isocianuro, ciclometalado (C^N) o alquinilo permite estudiar la influencia de estos …
-
Deep structure ultrasound imaging using fundamental and third harmonic coded excitation techniques
… depth and the contrast-to-noise ratio (CNR) for an ultrasonic imaging system. The thickness mode of piezoelectric transducers produces a signal that is resonant at a fundamental frequency and odd harmonics. This behavior is exploited using coded excitation techniques to increase the …
-
Carbenos Metala-N-heterocíclicos: aportaciones a un nuevo concepto en química organometálica
… [Fe(Cp)(CO)2{C(NHR)(NHMe)}]+ y [Fe(Cp)(CNR)(CO){C(NHR)(NHMe)}]+ y sus correspondientes derivados desprotonados formamidinilo, que en los complejos de Fe(II) forman metalaciclos por ataque nucleofílico intramolecular a un ligando isocianuro adyacente. Estos complejos sufren a su vez …
-
Assessment and optimisation of digital radiography systems for clinical use
… was developed as part of the project to simulate CNR to optimise beam quality for chest radiography with an IDR system. The values were simulated for a chest phantom and adjusted to describe the performance of the system by inputting data on phosphor sensitivity, the signal transfer function …
-
Spatial distribution of tuberculosis in Nigeria and its socioeconomic correlates
… autocorrelation among case notifications rates (CNR). Spatial regression analysis identifies 138 (17%) of LGAs with high TB risks and finds a significant relationship between household size, urban residence access to transportation, population density, number of TB diagnostic services and TB. An …
-
Target-specific contrast agents for magnetic resonance microscopy
… produced larger contrast-to-noise ratios (CNR), per unit time, on Ti-weighted images between the deeper, more myelinated cortical layers (IV-VI) and adjacent, superficial layers (I-III) at both field strengths. Specifically, CNR for LFB-treated samples increased by 229± 13 per cent at 4.7T …
-
An Analytical Tool for Calculating Co-Channel Interference in Satellite Links That Utilize Frequency Reuse
… the degradation in the carrier to noise ratio (CNR) of the system. Comparisons for systems with differing system scenarios are also made. For example, overall CIRs are compared for different reuse numbers (3, 4, 7, and 13) in LEO and GEO satellite systems. In conclusion, as expected, it is …
-
Magnetic Resonance Imaging of the Heart and Vasculature at 3 Tesla: Novel Strategies for the Diagnosis and Risk Stratification of Cardiovascular Disease
… imaging (SENSE). Contrast-to-noise ratios (CNR) were compared between techniques. To evaluate the feasibility of coronary sinus flow MR imaging, ten women (age 38 years ± 10) with a mean BMI of 33 kg/m2 ± 8 were studied. Coronary sinus flow was measured at baseline and in response to cold …
-
Biochemical Characterizations of a Soybean (Glycine Max (L.) Merr. ) Nitrate Reductase Mutant and Crude and Purified Nitrate Reductases
… effect of a mutation which resulted in loss of cNR activity in the soybean mutant (gene symbol nr(,1)). In addition, crude and purified preparations of soybean leaf NR forms were biochemically characterized.
-
Quantitative evaluation of image quality in CT imaging using iodine and nanoparticle-based contrast agents
… was assessed in terms of image signal intensity, CNR, and image noise. Results: For all agents, lower tube voltage (kVp) increased both signal intensity and CNR, although this improvement came with elevated noise levels. For ICM, increased concentration significantly influenced image quality. For …
-
The Public Good and Private Business of the Crow Rate: Prairie Grain Handling and Transportation Policy
… rates to cover Canadian National Railway (CNR) and applied the rate regulations to grain and flour movement to the west coast ports. Combined with the highly decentralized network of grain elevator delivery points and railway branch lines, the Crow rate facilitated agricultural settlement …
-
Development and Optimisation of Radial Techniques for Sodium Magnetic Resonance Imaging
… region was detected. A contrast-to-noise ratio CNR = 23% between healthy tissue and tumour achieved with the 3D radial was 20% higher than the CNR of the cartesian sequence. In patients with a 23Na channel disfunction, a 23Na MRI signal increase of ~10% was measured. This method allows for the …
-
Computed tomography of cats without general anesthesia: feasibility, protocol development and assessment of cats with thoracic disease
… ratio (SNR), and contrast-to-noise ratio (CNR) were calculated. Three evaluators ranked the images for quality parameters including sharpness of liver margins, motion artifact, helical artifact and windmill artifact. The CT examinations were successfully completed in 90.9%of (20/22) normal …
-
System Flexibility and AI Computational Enhancement for Day-Ahead Power System Operations
… such as corrective network reconfiguration (CNR) and corrective demand response (CDR) as an economic tool are initially explored. Network reconfiguration is considered for superior economic incentive. In addition, it enables integration of RES, efficient utilization of energy storage, and …
Page 1 of 4