Fig. 4

Representative radiographs of food inflowing in the GD phantom. a Radiograph obtained 20 s after inflowing in group PC-1 using the liquid diet shows the disturbance-free passage of radiopaque liquid diet. b Radiographs obtained 20 s after inflowing in groups FC-1 and FC-2 using the soft diet show the narrowing passage of the diet (arrowhead) though the distal end of the stent in group FC-1 and relatively better passage of the diet (arrowhead) though the distal end of the stent in group FC-2. c Radiographs obtained 20 s after inflowing in groups PC-1 and FC-1 using the solid diet show poor passage of the diet through the wire mesh of the stent (arrowhead) in group PC-1 and food impaction (arrowheads) in group FC-1