Near-Infrared Optical Imaging Based on Time-Domain Photon Information

Fig. 8. Reconstructed results of absorption coefficient and scattering coefficient. (a)(d) Without measurement error; (b)(e) with 3% measurement error; (c)(f) with 5% measurement error

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Fig. 9. Medium models for simulating cancerous tissues. (a) Skin tissue; (b) liver tissue

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Fig. 10. Reconstruction results of skin tissue containing tumour. (a) Absorption coefficient; (b) scattering coefficient

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Fig. 11. Reconstruction results of liver tissue containing tumour. (a) Absorption coefficient; (b) scattering coefficient

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Table 1. Real distributions of optical parameters in medium
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Table 1. Real distributions of optical parameters in medium
Parameter Background medium Inclusion A Inclusion B
${μ_{a}}_{}$ /cm^-1 0.5 0.1 1.0
${μ_{s}}_{}$ /cm^-1 1.0 0.5 1.5

Table 2. Choice of initial value
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Table 2. Choice of initial value
Case ${μ_{a}}_{}$ /cm^-1 ${μ_{s}}_{}$ /cm^-1
Case 1 0.1 0.5
Case 2 0.5 1.0
Case 3 1.5 2.0
Case 4 3.5 4.0

Table 3. ENRMSE of reconstruction results
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Table 3. ENRMSE of reconstruction results
Case ${μ_{a}}_{}$ /cm^-1 ${μ_{s}}_{}$ /cm^-1
Case 1 0.13677 0.14156
Case 2 0.12764 0.10635
Case 3 0.19440 0.11756
Case 4 Misconvergence Misconvergence

Table 4. Search results of step acceleration algorithm
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Table 4. Search results of step acceleration algorithm
Initial value /cm^-1 Search result
${μ_{a}}_{}$ /cm^-1 ${μ_{s}}_{}$ /cm^-1
0.01 0.50179 0.99303
0.10 0.50180 0.99325
1.00 0.50188 0.99280
10.00 0.50187 0.99268
100.00 0.50188 0.99303

Table 5. Absorption and scattering coefficients of human skin tissue[29] and liver tissue[30]
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Table 5. Absorption and scattering coefficients of human skin tissue[29] and liver tissue[30]
Coefficient Skin Liver
Normal Tumour Normal Tumour
${μ_{a}}_{}$ /cm^-1 0.15 0.06 1.00 0.60
${μ_{s}}_{}$ /cm^-1 75.00 15.80 204.00 108.00

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Yaobin Qiao, Xin Chen, Zhengyu Guo. Near-Infrared Optical Imaging Based on Time-Domain Photon Information[J]. Acta Optica Sinica, 2019, 39(4): 0412011

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