Table 1.
Criteria used for scoring on HRCT thorax in patients with allergic bronchopulmonary aspergillosis (Modified and adapted from Webb WR, Muller NL, Naidich DP. High-Resolution CT of the Lung. 5th ed..)[5]
| Category | Score | |||
|---|---|---|---|---|
| 0 | 1 | 2 | 3 | |
| Severity of bronchiectasis | Absent | Mild (Luminal diameter greater than adjacent blood vessel) | Moderate (Lumen two to three times the diameter of the vessel) | Severe (Lumen more than three times the diameter of the vessel) |
| Extent of bronchiectasis | Absent | 1-5 segments | 6-9 segments | >9 segments |
| Axial distribution of bronchiectasis | Absent | Inner third | Up to middle third | Into the outer third |
| Bronchial wall thickening | Absent | Present (more than 0.5X compared to adjacent pulmonary artery) | ||
| Extent of mucus plugging | Absent | 1-5 segments | 6-9 segments | >9 segments |
| Extent of centrilobular nodules | Absent | 1-5 segments | 6-9 segments | >9 segments |
| Severity of mosaic perfusion | Absent | 1-5 segments | > 5 segments | |
| Severity of collapse/ consolidation | Absent | Subsegmental | Segmental or lobar | |
| Severity of emphysema | Absent | 1-5 segments | > 5 segments | |
| Severity of bullae | Absent | unilateral not more than 4 | bilateral not more than 4 | more than 4 |
HRCT: High-resolution computed tomography