Table 3 Experimental results and regression results for force–displacement curve
From: A study of the surface characteristics of homemade ultrasound phantoms
Test condition | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
T10KCNO | T7KCP | T10KCP | T7KHP | T10BCP | B7KLCP | B7KHP | B10KCP | B7KCP | B10KCNO | |
Avg. max compression depth (mm) | 14.3 | 12.7 | 10 | 14.7 | 12.7 | NA | 19 | 22.5 | 13 | 10.5 |
St. deviation (mm) | 3.8 | 0.6 | 1 | 3.1 | 0.6 | NA | 0 | 0.7 | 1.4 | 2.1 |
Stiffness coefficient (g/mm) | 48.9 | 45.8 | 52.1 | 48.9 | 52.2 | 53.8 | 32.8 | 16.5 | 37.6 | 46.1 |
SE stiffness coefficient | 2.9 | 1.6 | 2.9 | 1.0 | 1.3 | 1.3 | 2.4 | 1.3 | 1.2 | 1.4 |
Constant (g) | 51.4 | 47.3 | 69.1 | −42.1 | 41.7 | −210 | 25.1 | 134 | 45.2 | 49.8 |
SE constant | 30.8 | 14.5 | 20.3 | 10.7 | 11.0 | 25.2 | 32.7 | 18.9 | 11.0 | 11.0 |
Model fit (R2) | 0.91 | 0.95 | 0.90 | 0.98 | 0.97 | 0.96 | 0.87 | 0.91 | 0.98 | 0.98 |