Table 1. Score definitions.
| Score Area |
2 | 1 | 0 |
| Ph | The region surrounded by SMA or SMV and the scope is clearly visible | Partially visible | Not visible |
| Pb | The region between SPA or SPV and the gastric wall is clearly visible | Partially visible | Not visible |
| Phb | The proximal parenchyma of the junction of SMV, SPV, and PV is clearly visible | Partially visible | Not visible |
| Pt | The parenchyma adjacent to the splenic hilum and left kidney is clearly visible | Partially visible | Not visible |
| Bile duct (Bm and Bi) |
The entire area is clearly visible | Partially visible | Not visible |
| Bile duct (Bs and Bp) |
The entire area is clearly visible | Partially visible | Not visible |
| Cystic duct | The spiral duct connected to the bile duct is clearly visible | Partially visible | Not visible |
| Gallbladder | The gallbladder neck to the fundus is captured on a single screen | Only the transverse image | Not visible |
| Papilla | Image of the pancreatic and bile ducts penetrating the duodenal muscularis propria | Image of only the pancreatic or bile duct penetrating the duodenal muscularis propria or low-echoic triangular lesion | Not visible |
| CA | Clearly visible | – | Not visible |
| SMA | Clearly visible | – | Not visible |
Ph, pancreatic head; Pb, Pancreatic body; Phb, pancreatic neck; Pt, pancreatic tail; Bi, lower bile duct; Bm, middle bile duct; Bs, superior bile duct; Bp, hepatic portal region; CA, celiac artery; SMA, superior mesenteric artery; SMV, superior mesenteric vein; SPA, splenic artery; SPV, splenic vein.