Scoring system used to analyze and compare MR DCG and DS DCG images
| Lacrimal sac | Small (1) | Normal (2) | Dilated (3) | – |
| Sac-NLD junction | Obstructed (1) | Stenotic (2) | Normal (3) | Dilated (4) |
| Stent | Obstructed (1) | Stenotic (2) | Normal (3) | – |
| NLD | Obstructed (1) | Stenotic (2) | Normal (3) | Dilated (4) |
| Contrast media in the nasal cavity | Nonexistent (0) | Existent (1) | – | – |
Note:– indicates absent.