Uniformization correction method for X-ray hardened artifact and based on spiral die bodies
An X-ray and beam hardening technology, applied in the field of multi-energy X-ray CT beam hardening calibration, can solve problems such as easy introduction of errors, need to re-measure, and time-consuming
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[0037] The invention combines the characteristics of industrial production to quickly and accurately measure the projection information of materials under X-rays.
[0038] 1. Model design
[0039] Motif One:
[0040] 1) The upper part of the phantom is a measuring structure, and the lower part is an auxiliary structure, and the two are directly connected;
[0041] 2) The outer edge of the measurement structure is a cylinder formed by an Archimedes spiral, the inner circle is circular, and the center of the hole coincides with the center of the spiral. A Cartesian coordinate system is established with the center of the circle as the origin. The parameter equation in the coordinate system is
[0042]
[0043] Among them, L and S are the length parameters in spiral processing, and d is the diameter of the inner circular hole. These three parameters jointly determine the measurement range of the phantom. θ is the spiral rotation angle radian, and the range is [0, 2π].
[0044] When the meas...
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