Based On SystemVerilog CBCT Key Modules Reconstruction

At prensent, Cone-Beam Computed Tomography also caused wide attention inmedical application, because it has a lot of advantages, includes very fast acquisitionspeed, high detection efficiency and the higher resolution of the images. In thealgorithm of image reconstruction of CBCT, the algorithm of Katsevich can accuratelyrealize image reconstruction, so for the research of Katsevich has not stopped.This thesis mainly study the key modules hardware realization of Katsevich, anduse the System Verilog as the language of the hardware modeling, because of theSystem Verilog increased a lot of new functions, including new data types, alwaysmodules divided and interfaces, making the whole hardware modeling more concise andaccurate.In this thesis, realizing the hardware modeling and simulation of the SystemVerilog for the differential derivation, the interpolation algorithm and the backprojection of the image reconstruction of the CBCT, and optimize the most concernedabout memory use and speed of each modules. In the modeling process of thedifferential derivation, using the simple logic operation and selector can save a quarterof the using of memory. In the process of the interpolation calculation, using thepipeline structure improves the speed of operation. The most important step of the entireCBCT image reconstruction is the reverse projection，not only taking a lot of memoryspace to store the data, and computing time. This design uses a new realization that themethod of updating the domain, making to store a data memory space can complete theback projection operation. At the same time, the pipeline structure makes the timespending down to low. Finally, the design meets the requirements of little memory useand fast reconstruction speed by simulation.