Table 1 Box–Behnken experimental design variables.

From: Regression analysis on forward modeling of diffuse optical tomography system for carcinoma cell detection

Unconditional variables

Levels used (coded)

Units

Low (− 1)

Medium (0)

High (+ 1)

850 nm x1

volts

1.9

2.05

2.2

780 nm x2

volts

1.6

2

2.4

Space x3

cm

2

3

4

Conditional variables

 Photodetector Ph1

volts

 

 Photodetector Ph1

volts

 

 Photodetector Ph2

volts

 

 Photodetector Ph3

volts

 

 Photodetector Ph4

volts

 

 Photodetector Ph5

volts

 

 Photodetector Ph6

volts

 

 Absorption coefficient

cm−1

 

 Scattering coefficient

cm−1

 

 Photonic flux

a.u.

 
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