Browsing by Subject "Calibration"
Now showing items 1-16 of 16
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3D refraction correction and extraction of clinical parameters from spectral domain optical coherence tomography of the cornea.
(Opt Express, 2010-04-26)Capable of three-dimensional imaging of the cornea with micrometer-scale resolution, spectral domain-optical coherence tomography (SDOCT) offers potential advantages over Placido ring and Scheimpflug photography based systems ... -
A unifying framework for interpreting and predicting mutualistic systems.
(Nature communications, 2019-01)Coarse-grained rules are widely used in chemistry, physics and engineering. In biology, however, such rules are less common and under-appreciated. This gap can be attributed to the difficulty in establishing general rules ... -
Ca2+ channel nanodomains boost local Ca2+ amplitude.
(Proc Natl Acad Sci U S A, 2013-09-24)Local Ca(2+) signals through voltage-gated Ca(2+) channels (CaVs) drive synaptic transmission, neural plasticity, and cardiac contraction. Despite the importance of these events, the fundamental relationship between flux ... -
Calibrating single-ended fiber-optic Raman spectra distributed temperature sensing data.
(Sensors (Basel), 2011)Hydrologic research is a very demanding application of fiber-optic distributed temperature sensing (DTS) in terms of precision, accuracy and calibration. The physics behind the most frequently used DTS instruments are considered ... -
Computed tomography dose index and dose length product for cone-beam CT: Monte Carlo simulations.
(Journal of applied clinical medical physics, 2011-01-19)Dosimetry in kilovoltage cone beam computed tomography (CBCT) is a challenge due to the limitation of physical measurements. To address this, we used a Monte Carlo (MC) method to estimate the CT dose index (CTDI) and the ... -
Development and Implementation of Bayesian Computer Model Emulators
(2011)Our interest is the risk assessment of rare natural hazards, such aslarge volcanic pyroclastic flows. Since catastrophic consequences ofvolcanic flows are rare events, our analysis benefits from the use ofa computer model ... -
Imaging system QA of a medical accelerator, Novalis Tx, for IGRT per TG 142: our 1 year experience.
(Journal of applied clinical medical physics, 2012-07-05)American Association of Physicists in Medicine (AAPM) task group (TG) 142 has recently published a report to update recommendations of the AAPM TG 40 report and add new recommendations concerning medical accelerators in ... -
On Uncertainty Quantification for Systems of Computer Models
(2017)Scientific inquiry about natural phenomena and processes are increasingly relying on the use of computer models as simulators of such processes. The challenge of using computer models for scientific investigation is that ... -
Optimal processing of photoreceptor signals is required to maximize behavioural sensitivity.
(The Journal of physiology, 2010-06)The sensitivity of receptor cells places a fundamental limit upon the sensitivity of sensory systems. For example, the signal-to-noise ratio of sensory receptors has been suggested to limit absolute thresholds in the visual ... -
Plate-specific gain map correction for the improvement of detective quantum efficiency in computed radiography.
(2010)The purpose of this work is to improve the NPS, and thus DQE, of CR images by correcting for pixel-to-pixel gain variations specific to each plate. Ten high-exposure open field images were taken with an RQA5 spectrum, with ... -
PRODUCING GROWTH ESTIMATES OF DUKE FOREST PINE STANDS USING USDA’S FOREST VEGETATION SIMULATOR
(2021-04-28)Duke Forest manages its loblolly pine stands for timber revenues. Duke Forest seeks construct a management plan informed by an optimized harvest schedule. This project aims to produce a reliable growth and yield model in ... -
Separating DNA with different topologies by atomic force microscopy in comparison with gel electrophoresis.
(J Phys Chem B, 2010-09-23)Atomic force microscopy, which is normally used for DNA imaging to gain qualitative results, can also be used for quantitative DNA research, at a single-molecular level. Here, we evaluate the performance of AFM ... -
Spectral diffusion: an algorithm for robust material decomposition of spectral CT data.
(Phys Med Biol, 2014-11-07)Clinical successes with dual energy CT, aggressive development of energy discriminating x-ray detectors, and novel, target-specific, nanoparticle contrast agents promise to establish spectral CT as a powerful functional ... -
Strategic planning to reduce the burden of stroke among veterans: using simulation modeling to inform decision making.
(Stroke, 2014-07)BACKGROUND AND PURPOSE: Reducing the burden of stroke is a priority for the Veterans Affairs Health System, reflected by the creation of the Veterans Affairs Stroke Quality Enhancement Research Initiative. To inform the ... -
Towards a field-compatible optical spectroscopic device for cervical cancer screening in resource-limited settings: effects of calibration and pressure.
(Opt Express, 2011-09-12)Quantitative optical spectroscopy has the potential to provide an effective low cost, and portable solution for cervical pre-cancer screening in resource-limited communities. However, clinical studies to validate the use ... -
Using Gaussian Processes for the Calibration and Exploration of Complex Computer Models
(2014)Cutting edge research problems require the use of complicated and computationally expensive computer models. I will present a practical overview of the design and analysis of computer experiments in high energy nuclear and ...
