Bronchiectasis Score (range, 0–12) =	Extent of Bronchiectasis in Central Lung 0 = None 1 = 1/3 of Lobe 2 = 1/3–2/3 of Lobe 3 ≥ 2/3 of Lobe	+ Extent of Bronchiectasis in Peripheral Lung 0 = None 1 = 1/3 of Lobe 2 = 1/3–2/3 of Lobe 3 ≥ 2/3 of Lobe	× Average Bronchiectasis Size Multiplier Average Multiplier Size 0.5 = 0 1 = 1 1.5 = 1.25 2.0 = 1.5 2.5 = 1.75 3 = 2
Average bronchiectasis size multiplier =	Size of largest dilated bronchus 1 ≤ 2× 2 = 2× –3× 3 ≥ 3×	+ Average size of dilated bronchi 1 ≤ 2× 2 = 2× –3× 3 ≥ 3×	÷ 2
Mucous plugging score (range, 0–6) =	Extent of mucous plugging in central lung 0 = none 1 = 1/3 of lobe 2 = 1/3–2/3 of lobe 3 ≥ 2/3 of lobe	+ Extent of mucous plugging in peripheral lung 0 = none 1 = 1/3 of lobe 2 = 1/3–2/3 of lobe 3 ≥ 2/3 of lobe
Peribronchial thickening score (range, 0–9) =	Extent of peribronchial thickening in central lung 0 = none 1 = 1/3 of lobe 2 = 1/3–2/3 of lobe 3 ≥ 2/3 of lobe	+ Extent of peribronchial thickening in peripheral lung 0 = none 1 = 1/3 of lobe 2 = 1/3–2/3 of lobe 3 ≥ 2/3 of lobe	× Severity of peribronchial thickening 1 = mild 1.25 = moderate 1.5 = severe
Parenchyma score (range, 0–9) =	Extent of dense parenchyma opacity 0 = none 1 = 1/3 of lobe 2 = 1/3–2/3 of lobe 3 ≥ 2/3 of lobe	+ Extent of ground glass opacity 0 = none 1 = 1/3 of lobe 2 = 1/3–2/3 of lobe 3 ≥ 2/3 of lobe	+ Extent of cysts or bullae 0 = none 1 = 1/3 of lobe 2 = 1/3–2/3 of lobe 3 ≥ 2/3 of lobe
Hyperinflation score (range, 0–4,5)	Extent of air trapping 0 = none 1 = 1/3 of lobe 2 = 1/3–2/3 of lobe 3 ≥ 2/3 of lobe	× Appearance of air trapping 1 = subsegmental 1.5 = segmental or larger