X-ray imaging apparatus
A photographic device and X-ray technology, which is applied to measurement devices, X/γ/cosmic radiation measurement, radiation measurement, etc., can solve the problem of inability to obtain X-ray photon energy information, and achieve the effect of preventing quantitative reduction.
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no. 1 approach
[0062] The present embodiment is characterized in that all three types of processing are performed, namely removal of inflows from other elements, removal of energy transfer inflows in the same element, and interpolation of unmeasured values in the same element. Below, refer to Figure 7 The flow of count correction in this embodiment will be described.
[0063] (S5011)
[0064]In the calibration process, first, a parameter indicating the ratio of movement of X-ray photons between elements and a parameter indicating the ratio of energy transfer within the same element are obtained. The former parameter obtains the following three types of parameters for each element according to the difference in the energy range: the X-ray photon representing the X-ray photon measured in the high energy range of the target element 11 among the signals incident on the adjacent element 12 in the high energy range The proportional parameter α H_H ; represents the parameter α of the proport...
change example 1
[0120]In the first embodiment, all three processes of removing inflow, removing energy transfer inflow, and supplementing energy transfer outflow are performed in the count correction, but these processes can also be omitted depending on the characteristics of the detector, etc. 1 or 2 of the treatments.
[0121] For example, in the case where the crosstalk between elements is negligibly small, it is possible to omit the inflow removal ( Figure 7 : S5012). In this case, using the above equations (5), (6) and the parameter β H_L (x) and gamma H_L (x) to perform count correction S501.
[0122] In addition, in the case of the range where the energy transfer in the element can be ignored, the two processes of removing energy transfer inflow and supplementing energy transfer outflow are omitted, and the above-mentioned formulas (4-1), (4-2) and parameters α to perform count correction S501.
[0123] Further, counting correction S501 of inflow removal and energy transfer inflo...
change example 2
[0130] In the first embodiment, although it is described that α is obtained in advance H_H 、α H_L ,, α L_L , β H_H (x), gamma H_L (x) and other parameters are used as fixed values, but the parameters may be changed automatically or manually according to imaging conditions and the like. The X-ray CT apparatus of the present embodiment is characterized by having a function of changing parameters automatically or manually.
[0131] Figure 10 An example of a functional block diagram of the control unit 107 and the central processing unit 105 of this embodiment is shown.
[0132] As shown in the figure, the control unit 107 includes an imaging condition setting unit 170 . The parameter setting part 140 of the central processing unit 105 except Figure 4 In addition to the functions shown, it also has a function as a parameter calculation unit. In addition, in Figure 10 in, for Figure 4 The same elements are denoted by the same symbols, and explanations thereof are omit...
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