Table 4.
Correlation matrix of HRCT histogram indices including NL, PFF, HAA_A, kurtosis, HAA and LAA at 0 and +200 HU threshold. In NL, PFF, HAA_A, HAA, LAA parameters, the ‘%’ has been omitted for ease of reading.
| HU: 0 | HU: 200 | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| NL | PFF | HAA_A | Kurtosis | HAA | LAA | NL | PFF | HAA_A | Kurtosis | HAA | LAA | |
| NL | 1.00 | −0.65 | −0.65 | 0.51 | −0.10 | −0.34 | 1.00 | −0.83 | −0.24 | 0.81 | −0.76 | −0.14 |
| PFF | −0.65 | 1.00 | 0.99 | −0.62 | 0.13 | −0.49 | −0.83 | 1.00 | 0.45 | −0.90 | 0.79 | −0.44 |
| HAA_A | −0.65 | 0.99 | 1.00 | −0.62 | 0.10 | −0.48 | −0.24 | 0.45 | 1.00 | −0.36 | −0.19 | −0.40 |
| Kurtosis | 0.51 | −0.62 | −0.62 | 1.00 | −0.69 | 1.00 | 0.81 | −0.90 | −0.36 | 1.00 | −0.77 | 0.29 |
| HAA | −0.10 | 0.13 | 0.10 | −0.69 | 1.00 | −0.06 | −0.76 | 0.79 | −0.19 | −0.77 | 1.00 | −0.19 |
| LAA | −0.34 | −0.49 | −0.48 | 0.19 | −0.06 | 1.00 | −0.14 | −0.44 | −0.40 | 0.29 | −0.19 | 1.00 |