Acta Optica Sinica, Volume. 37, Issue 8, 0811003(2017)
An Iterative All-Geometric-Parameter Calibration Method for Cone-Beam Computed Laminography System
Figures & Tables(10)
Fig. 5. Reconstruction results of Shepp-Logan phantom. (a) Images of XY slice; (b) images of XZ slice; (c) images of YZ slice
Fig. 6. Reconstruction results of the PCB phantom. (a) Ideal image; (b) image corrected by Zhang's method; (c) image corrected by the proposed method
Table 1. Parameter calibration results with noise level of 0.05
View tableTable 1. Parameter calibration results with noise level of 0.05
Parameter Zhang's method in CT system Zhang's method in CL system Real value Measured value Real value Measured value η /(°)0.035 0.034 0.029 0.028 pX /mm4.587 4.595 39.861 39.657 pZ /mm0.664 0.867 1212.932 1205.948 sX /mm5 5.039 5 4.836 sY /mm1450 1450.025 1450 1445.835 sZ /mm-2 -0.456 -2 3.771 t 7.250 7.252 12.242 12.209
Table 2. Parameter calibration results with noise level of 0.1
View tableTable 2. Parameter calibration results with noise level of 0.1
Parameter Zhang's method in CT system Zhang's method in CL system Real value Measured value Real value Measured value η /(°)0.035 0.034 0.029 0.028 pX /mm4.587 4.573 39.861 39.649 pZ /mm0.664 0.360 1212.932 1206.385 sX /mm5 5.049 5 5.529 sY /mm1450 1449.781 1450 1447.381 sZ /mm-2 -1.362 -2 5.069 t 7.250 7.252 12.242 12.201
Table 3. Parameter calibration results with noise level of 0.05
View tableTable 3. Parameter calibration results with noise level of 0.05
Parameter Real value Zhang's method Proposed method η /(°)0.029 0.028 0.028 pX /mm39.861 39.657 39.742 pZ /mm1212.932 1205.948 1212.919 sX /mm5 4.836 5.055 sY /mm1450 1445.835 1451.483 sZ /mm-2 3.771 -0.261 t 12.242 12.209 12.231
Table 4. Parameter calibration results with noise level of 0.1
View tableTable 4. Parameter calibration results with noise level of 0.1
Parameter Real value Zhang's method Proposed method η /(°)0.029 0.028 0.028 pX /mm39.861 39.649 39.673 pZ /mm1212.932 1206.385 1212.971 sX /mm5 5.529 5.089 sY /mm1450 1447.381 1450.921 sZ /mm-2 5.069 -0.929 t 12.242 12.201 12.225
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Jingyu Wang, Yu Han, Lei Li, Xiaoqi Xi, Jianbang Liu, Bin Yan. An Iterative All-Geometric-Parameter Calibration Method for Cone-Beam Computed Laminography System[J]. Acta Optica Sinica, 2017, 37(8): 0811003
Paper Information
Category: Imaging Systems
Received: Mar. 10, 2017
Accepted: --
Published Online: Sep. 7, 2018
The Author Email: Yan Bin (ybspace@hotmail.com)
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