Stone size in the subgroup of patients with small stones (⩽6 mm)
| Size (mm) | No of cases observed by reference method | No of cases observed by MRC |
| 1–2 | 5 | 1 |
| 1–3 | 6 | 2 |
| 2–4 | 6 | 3 |
| 4–6 | 10 | 3 |
| Total | 27 | 9 |
Some patients from each size group had two stones or more.
MRC, magnetic resonance cholangiography.