Orthogonal Translation Computed Laminography

Zhongjian Tian; Haijun Yu; Linbo Wang; Zhenzhen Pi; Fenglin Liu

doi:10.3788/AOS202040.2211002

Acta Optica Sinica, Volume. 40, Issue 22, 2211002(2020)

Orthogonal Translation Computed Laminography

Zhongjian Tian¹, Haijun Yu^2,3, Linbo Wang¹, Zhenzhen Pi¹, and Fenglin Liu^1,2,3、*

Author Affiliations

¹State Key Laboratory of Mechanical Transmission, Chongqing University, Chongqing 400044, China

²Key Laboratory of Optoelectronic Technology and Systems, Ministry of Education, Chongqing University, Chongqing 400044, China

³Engineering Research Center of Industrial Computed Tomography Nondestructive Testing, Ministry of Education, Chongqing University, Chongqing 400044, China

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Figures & Tables(16)

Fig. 1. Geometric model of OTCL system. (a) 3D scanning model; (b) scanning model in z direction; (c) scanning model in x direction

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Fig. 2. Simulation phantom

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Fig. 3. 31^st slice of global reconstruction images using cone-beam. (a) Original image; (b)-(e) results of OTCL; (f)-(i) results of PTCL

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Fig. 4. Central profiles of the 31^st slice of global reconstruction images obtained by OTCL and PTCL using cone-beam. (a)(b) OTCL; (c)(d) PTCL

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Fig. 5. 29^th slice of partial reconstructed images obtained by CL imaging using cone-beam. (a) Original image; (b)-(e) OTCL; (f)-(i) PTCL

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Fig. 6. Central profiles of the 29^th slice of cone-beam partial reconstruction images obtained by OTCL and PTCL. (a)(b) OTCL; (c)(d) PTCL

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Fig. 7. System framework diagram

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Fig. 8. Experimental system. (a) Three-dimensional model; (b) photograph of system

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Fig. 9. PCB of detected object

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Fig. 10. Results of 96^th slice of global reconstruction image. (a)(b) Using OTCL; (c)(d) using PTCL

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Fig. 11. Results of 94^th slice of partial reconstruction image. (a)(b) Using OTCL; (c)(d) using PTCL

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Table 1. Setting of simulation parameters of global reconstruction

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Table 1. Setting of simulation parameters of global reconstruction

Parameter	Setting
Distance from source to detector ${S_{DD}}_{}$ /mm	384.31
Distance from source to object ${S_{OD}}_{}$ /mm	164.71
Size of detector array /(pixel×pixel)	512×512
Pixel size /(mm×mm)	0.085×0.085
Number of projections per scan	101
Translation mode	Equi-angular
Size of reconstruction matrix	256×256×64
Iterations	50

Table 2. M_SE obtained by different methods for different angles10^-4
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Table 2. M_SE obtained by different methods for different angles10^-4
Angle /(°) 30 60 90 120
OTCL 171 62 30 26
PTCL 234 161 128 101

Table 3. Simulation parameters of partial reconstruction

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Table 3. Simulation parameters of partial reconstruction

Parameter	Setting
Distance from source to detector ${S_{DD}}_{}$ /mm	392.16
Distance from source to object ${S_{OD}}_{}$ /mm	117.65
Size of detector array /(pixel×pixel)	512×512
Pixel size /(mm×mm)	0.085×0.085
Number of projections per scan	101
Translation mode	Equi-angular
Size of reconstruction matrix	256×256×64
Iterations	50

Table 4. M_SE of OTCL and PTCL for different scanning angles
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Table 4. M_SE of OTCL and PTCL for different scanning angles
Angle /(°) 30 60 90 120
OTCL /10^-6 2.99 1.23 0.71 0.48
PTCL /10^-6 4.03 2.73 2.26 1.74

Table 5. Scanning parameters

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Table 5. Scanning parameters

Parameter	Setting
Distance from source to detector S_DD /mm	224
Distance from source to object S_OD /mm	46
Size of detector array /(pixel×pixel)	1536×1536
Pixel size /(mm×mm)	0.085×0.085
Number of projections per scan	101
Translation mode	Equi-angular
Size of reconstruction matrix	256×256×64
Graduation angle 1 /(°)	40
Graduation angle 2 /(°)	80

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Zhongjian Tian, Haijun Yu, Linbo Wang, Zhenzhen Pi, Fenglin Liu. Orthogonal Translation Computed Laminography[J]. Acta Optica Sinica, 2020, 40(22): 2211002

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