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Research on Computed Tomography Reconstruction Technology Based on Flat Panel Detector

Author: MaTeng
Tutor: GuiZhiGuo
School: University of North
Course: Precision instruments and machinery
Keywords: Computed tomography Fan-beam scan Cone-beam scan Filtered back projection
CLC: TP391.41
Type: Master's thesis
Year: 2008
Downloads: 128
Quote: 3
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Abstract


With the advent of the amorphous silicon flat panel detector , for the development of X-ray digital imaging and tomography technique to create the conditions , this paper, based on the flat-panel detector system to study 2D-CT (Two Dimensional Computed Tomography) , and 3D -CT (Three Dimensional Computed Tomography). The research topics include : study fan-beam filtered back projection reconstruction algorithm , reference generalized Hamming window filter design , low-pass cosine filter and Blackman window three filters , three filters have their own characteristics , its use in the reconstruction algorithm , the image produced has a sharpening and smoothing effect . Also discussed in terms of reconstruction speed , a certain degree of optimization algorithm to improve the reconstruction speed . . Cone Beam 3D reconstruction algorithm FDK (Feldkamp, ??Davis and Kress) algorithm for three-dimensional reconstruction , focusing on research , on a series of pre-processing the basis of the actual projection data using the method to reconstruct the entire object slice Figure , after the use of a new method of image segmentation image post-processing , the reconstructed image .

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CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > Computer applications > Information processing (information processing) > Pattern Recognition and devices > Image recognition device
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