14 September 1993 Performance evaluation of an XRII-based volume CT scanner
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A laboratory quantitative CT scanner capable of producing high-resolution images in all three dimensions has been developed. The system uses an x-ray image intensifier (XRII), optically coupled to a time-delay integration (TDI) CCD to obtain low-noise, high-resolution projections from many angles around a rotating sample. The scanner operates in two modes, producing either a single, transverse image through the sample or a three-dimensional image of the sample volume, over a field-of-view (FOV) ranging from 4 to 12 cm. The performance of this quantitative CT system has been characterized with respect to accuracy, precision, and spatial resolution. The average accuracy in attenuation measurements was +/- 0.01 cm-1 (RMS). Measurement precision varied with voxel size and x-ray exposure, from +/- 0.01 cm-1 to +/- 0.03 cm-1. Limiting spatial resolution also varied with scanner FOV, ranging from 2.8 mm-1 to 1.2 mm-1 for the 4 and 12 cm FOVs, respectively. Applications of the volume CT scanner in research tasks using live animals and in vitro preparations are discussed.
© (1993) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
David W. Holdsworth, David W. Holdsworth, Maria Drangova, Maria Drangova, Aaron Fenster, Aaron Fenster, "Performance evaluation of an XRII-based volume CT scanner", Proc. SPIE 1896, Medical Imaging 1993: Physics of Medical Imaging, (14 September 1993); doi: 10.1117/12.154583; https://doi.org/10.1117/12.154583


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