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Table 2 Voxel density and functional lung mapping

From: Correlation of positron emission tomography ventilation-perfusion matching with CT densitometry in severe emphysema

Measure Site Slope coefficient R2 P value
Voxel density vs normal functional lung All lobes − 0.86 0.33 < 0.05
Upper lobes − 0.94 0.67 < 0.05
Lower lobes − 0.78 0.19 < 0.05
Voxel density vs Matched defects All lobes 0.96 0.36 < 0.05
Upper lobes 0.98 0.58 < 0.05
Lower lobes 1.05 0.34 < 0.05
Voxel density vs unmatched defects All lobes − 0.10 0.01 0.33
Upper lobes − 0.04 0.01 0.68
Lower lobes − 0.27 0.07 0.18
Voxel density vs perfusion All lobes − 0.25 0.13 < 0.05
Upper lobes − 0.28 0.26 < 0.05
Lower lobes − 0.28 0.17 < 0.05
Voxel density vs ventilation All lobes − 0.13 0.04 0.10
Upper lobes -0.09 0.03 0.35
Lower lobes -0.26 0.16 < 0.05
Perfusion vs ventilation All lobes 0.86 0.82 < 0.05
Upper lobes 0.70 0.67 < 0.05
Lower lobes 0.86 0.79 < 0.05
Perfusion vs normal VQ All lobes 1.31 0.35 < 0.05
Upper lobes 1.52 0.52 < 0.05
Lower lobes 2.15 0.66 < 0.05
Ventilation vs normal VQ All lobes 1.94 0.51 < 0.05
Upper lobes 1.13 0.20 < 0.05
Lower lobes 1.94 0.51 < 0.05