Table 3 Relationship between the value of elastic registration (Jac-mean and Dice similarity coefficient) and pulmonary vascular-related indexes on HRCT

Total pulmonary vascular

 Volume (ml)

0.245

< 0.01^*

− 0.146

> 0.05

 Number

0.277

< 0.01^*

− 0.168

> 0.05

 Tortuosity

− 0.320

< 0.01^*

− 0.050

> 0.05

Pulmonary vein vascular

 Volume (ml)

0.162

> 0.05

− 0.088

> 0.05

 Number

0.188

< 0.05^*

− 0.212

> 0.05

 Tortuosity

− 0.210

< 0.05^*

0.001

> 0.05

Pulmonary artery vascular

 Volume (ml)

0.267

< 0.01^*

− 0.146

> 0.05

 Number

0.303

< 0.01^*

− 0.113

> 0.05

 Tortuosity

− 0.350

< 0.01^*

− 0.107

> 0.05