نتایج جستجو برای: micro scan image
تعداد نتایج: 555984 فیلتر نتایج به سال:
Understanding the visual scan patterns radiologists use to view medical images is critical to the design of image viewing devices_ We used an Eyetracker, a device for recording eye and head movement, to determine the visual scan patterns during the interpretation of single and multiple computed tomographic (CT) scans presented on a four-over-four viewbox. CT scans were used because they represe...
A bright μm-sized source of hard synchrotron x-rays (critical energy Ecrit > 30 keV) based on the betatron oscillations of laser wakefield accelerated electrons has been developed. The potential of this source for medical imaging was demonstrated by performing micro-computed tomography of a human femoral trabecular bone sample, allowing full 3D reconstruction to a resolution below 50 μm. The us...
S. Krueger, T. Schaeffter, S. Weiss, K. Nehrke, T. Rozijn, P. Boernert Philips Research, Hamburg, Germany, Philips Medical Systems, Best, Netherlands Objective: Motion is one of the most prominent problems for many time-consuming MR imaging procedures. For instance, head motion during 3D scans or functional studies can cause image artifacts or deteriorate the spatial resolution of activation pa...
This work is a primary achievement in studying the CO2 and N2–oil systems. To predict gas-liquid relative permeability curves, a Shan-Chen type multicomponent multiphase lattice Boltzmann model for two-phase flow through 2D porous media is developed. Periodic and bounce back boundary conditions are applied to the model with the Guo scheme for the external body force (i.e., the pressure gradient...
The Medipix All Resolution System (MARS) system is a commercial spectral/multi-energy micro-CT scanner designed and assembled by the MARS Bioimaging, Ltd. in New Zealand. This system utilizes the state-of-the-art Medipix photon-counting, energy-discriminating detector technology developed by a collaboration at European Organization for Nuclear Research (CERN). In this paper, we report our preli...
Real-time 4D full-range complex-conjugate-free Fourier-domain optical coherence tomography (FD-OCT) is implemented using a dual graphics processing units (dual-GPUs) architecture. One GPU is dedicated to the FD-OCT data processing while the second one is used for the volume rendering and display. GPU accelerated non-uniform fast Fourier transform (NUFFT) is also implemented to suppress the side...
We present a new technique for content based image retrieval where feature vector to be matched is very much specific to the query image. A particular Peano scan which is optimal in encoding the query image is used to convert the scanning pattern of all database images. Features are derived from these scan converted images to calculate the similarity measure. The features being query specific, ...
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