Table 1 Experimental setup

Soil block dimensions

40 × 15 × 10 cm³

Source-Detector Distance (SDD)

2.94 m

Source-Object Distance (SOD)

2.64 m

Object-Detector Distance (ODD)

0.30 m

Magnification

× 1.11

Detector pixel size

200 μm

Reconstructed voxel size

180 μm

Tube voltage

200 kV

Current

4.5 mA

Focal spot size

3 mm

Detector scan speed

2 m/min

Number of projections

540

Angular step

0.5°

Scanned area

26 × 51.2 cm²

Image dimensions

1300 × 2560 pixel²

Output

12 bit

Acquisition time

3 h 40 min