Changes of interstitial lung disease seen on chest high-resolution CT can be monitored by a score based on its zonal distribution.
Patient selection: interstitial lung disease (ILD)
Examination: high-resolution CT images
|
Zone
|
Location
|
|
A
|
above the aortic arch
|
|
B
|
between the aortic arch and level of the carina
|
|
C
|
level of the carina and the level of the inferior pulmonary veins
|
|
D
|
below the inferior pulmonary veins
|
Changes that can be seen on HRCT:
(1) ground glass opacity
(2) reticular opacities
(3) consolidation
(4) honeycombing
(5) traction bronchiectasis
(6) linear opacity
|
Zonal Involvement
|
Points
|
|
none
|
0
|
|
1 to 4%
|
1
|
|
5 to 14%
|
2
|
|
15 to 29%
|
3
|
|
30 to 49%
|
4
|
|
>= 50%
|
5
|
total score =
= SUM(points for the 4 zones)
Interpretation:
• minimum score: 0
• maximum score: 20
