Facility Support: High-Resolution X-ray Computed Tomography Laboratory

设施支持：高分辨率X射线计算机断层扫描实验室

• 批准号: 0948842
• 负责人: Richard Ketcham
• 金额: $ 74.87万
• 依托单位: University of Texas at Austin
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2010
• 资助国家: 美国
• 起止时间: 2010-04-01 至 2013-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0948842&HistoricalAwards=false
• 关键词: Facility; Support; Resolution; ray; Computed

0948842KetchamThis grant provides continued support for the University of Texas Computed X-ray Tomography (UTCT) Facility over a three year period. The CT scanner at UT was specifically designed to enable x-ray tomography of a range of geological materials and sample sizes. The technology was developed from commercial biomedical CAT scanners with the adoption of a higher energy x-ray source and higher resolution CCD detectors to allow micron-scale imaging of non-living geological samples. The technique allows for completely non-destructive imaging of the exteriors and interiors of samples. Differences in x-ray attenuation that occur due to variations in sample density and the elemental composition of the material along the x-ray path are digitally recorded by a CCD. Samples are mounted on a rotating table in front of the x-ray source. Radial 2-d slices of the attenuated x-rays are stacked by vertical translation of the sample table. Resultant x-ray ?sinograms? are then reduced via computer algorithms to render high resolution 3-D images of the density distributions within samples. Research applications spanning the geosciences, biology, engineering and anthropology are routinely supported. Data and images from UTCT scans are web-accessible data and extremely useful for teaching.***

这项拨款为德克萨斯大学计算机x射线断层扫描（UTCT）设施提供为期三年的持续支持。UT的CT扫描仪是专门设计的，可以对各种地质材料和样品进行x射线断层扫描。该技术由商用生物医学CAT扫描仪发展而来，采用了更高能量的x射线源和更高分辨率的CCD探测器，可以对非生物地质样品进行微米级成像。该技术允许对样品的外部和内部进行完全无损的成像。由于样品密度的变化和沿着x射线路径的材料元素组成的变化而发生的x射线衰减的差异由CCD数字记录。样品被安装在x射线源前的旋转台上。通过样品表的垂直平移叠加衰减x射线的径向二维切片。生成的x射线图？然后通过计算机算法减少，以呈现样品内密度分布的高分辨率3d图像。研究应用跨越地球科学，生物学，工程学和人类学的常规支持。来自UTCT扫描的数据和图像是网络可访问的数据，对教学非常有用