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Accuracy of pancreato-biliary obstruction level (%) by different imageological methods
| Level | Intra-hepatic | Extra-hepatic | Main pancreatic | Total |
| B-US | 100.0 (8/8) | 81.7 (49/60) | 90.5 (19/21) | 85.4 (76/89) |
| CT | 100.0 (4/4) | 93.0 (40/43) | 100.0 (19/19) | 95.5 (63/66) |
| ERCP/PTC | 100.0 (5/5) | 96.7 (29/30) | 100.0 (8/8) | 97.7 (42/43) |
| MRCP | 100.0 (8/8) | 100.0 (60/60) | 100.0 (21/21) | 100.0 (89/89) |
