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Table 2 Propagation speed values of materials found in BMI and MWI scan scenarios.

From: An Entropy-Based Propagation Speed Estimation Method for Near-Field Subsurface Radar Imaging

Material Propagation speed
Canola oil 1.3416 × 108 m/s
Fatty breast tissue 7.071 × 107−1.732 × 108 m/s
Wood (Dry) 1.895 × 108 m/s
Wood (10.8% moisture) 1.603 × 108 m/s