نتایج جستجو برای: micro scan image
تعداد نتایج: 555984 فیلتر نتایج به سال:
Thorax photos with CT scans can be used to monitor development and diagnose lung abnormalities due COVID-19. This study aims find out the results of Scan analysis COVID-19 patients. The number samples as many 30 using quantitative research methods a descriptive approach. in this showed from 80% there is picture Pneumonia other images such GGO, Consolidation accompanied by water bronchogram, Cra...
OBJECTIVES The purpose of this study was to evaluate image quality and radiation dose using a prospectively electrocardiogram (ECG)-triggered axial scan protocol compared with standard retrospective ECG-gated helical scanning for coronary computed tomography angiography. BACKGROUND Concerns have been raised regarding radiation exposure during coronary computed tomography angiography. Although...
Figure 1 [1] There are two levels of CT imaging small animals – miniand micro-CT. Mini-CT has a voxel resolution that is equivalent to whole body CT of the adult human. Thus, a 30 cm diameter human chest is represented with up to 500 pixels clinically, so a 2 cm mouse chest would be represented by 500, 40, μm pixels. Higher resolution scans at the microscopic level are truly micro-CT scans. I w...
In this work, we present a comparison between different techniques of image compression. First, the image is divided in blocks which are organized according to a certain scan. Later, several compression techniques are applied, combined or alone. Such techniques are: wavelets (Haar's basis), Karhunen-Loève Transform, etc. Simulations show that the combined versions are the best, with minor Mean ...
Industrial CT (computerized tomography) uses a series of 2-dimensional images taken at specific intervals around the entire sample. Basically any type of industrial CT system uses three principal components: an X-ray tube, an X-ray detector, and a rotational stage. Everything is enclosed within a radiation shielding steel/lead/steel cabinet that typically ranges between four and 10 feet cubed. ...
Industrial CT (computerized tomography) uses a series of 2-dimensional images taken at specific intervals around the entire sample. Basically any type of industrial CT system uses three principal components: an X-ray tube, an X-ray detector, and a rotational stage. Everything is enclosed within a radiation shielding steel/lead/steel cabinet that typically ranges between four and 10 feet cubed. ...
We propose an empirical cupping correction (ECC) algorithm to correct for CT cupping artifacts that are induced by nonlinearities in the projection data. The method is raw data based, empirical, and requires neither knowledge of the x-ray spectrum nor of the attenuation coefficients. It aims at linearizing the attenuation data using a precorrection function of polynomial form. The coefficients ...
Our group has developed a biodegradable drug delivery device (micro-implant) for long-term slow intraocular release of methotrexate (MTX) that can be implanted in the peripheral vitreous. The purpose of this study was to assess the position of the implanted devices and the status of the adjacent vitreous and peripheral retina over time using B-scan ocular ultrasonography (US). In each of the ei...
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