Computed tomography-derived nasojejunal tube tip-to-gastric antrum path length and short-term outcomes in severe acute pancreatitis

Figure 2 Computed tomography-based measurement of the nasojejunal tube tip-to-gastric antrum curved path length. A: Three-dimensional volume-rendered reconstruction. The measurement began at the predefined gastric antrum-pylorus junction, followed the selected curved centerline (CL_3), and ended at the nasojejunal tube tip; B: Straightened centerline reconstruction showing the selected centerline and the 0-mm reference point with orthogonal cross-sectional images; C: Anatomical schematic showing the gastric antrum-pylorus junction, duodenum, duodenojejunal flexure/Ligament of Treitz region, and nasojejunal tube tip. The measured variable was the curved catheter path length from the antrum-pylorus junction to the tube tip; the duodenojejunal flexure was an anatomical reference. NJ: Nasojejunal.