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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