Stomach & Duodenum
PA IR Size: 11x13 or 14x17 LW SID: 40"" Page #'s: 2:126,236	Positioning:   • Pt prone to visualize stomach & duodenum   • Or upright to demonstrate size, shape & position of stomach-but doesn't clearly show fundus	CR Entrance & Angle:   • _|_ to center of IR   • Collimation:   • Best to Determine:   • Prone-Barium filled stomach & duodenal bulb   • Pt's with asthenic or hyposthenic body habitus the pyloric canal & duodenal bulb are well demonstrated	Eval Criteria:   • Entire stomach & duodenal loop   • Pyloric portion of stomach centered to IR   • NR
PA oblique (RAO) IR Size: 11x14 LW SID: 40"" Page #'s: 2:130,238	Positioning:   • Pt prone/recumbent   • Body rotated 40°-70° from prone pos, pt resting on flexed left knee & arm   • Increased rotation for hypersthenic pt's	CR Entrance & Angle:   • _|_ to center of IR   • Collimation:   • Best to Determine:   • Best projection of stomach & duodenal bulb for sthenic pt's	Eval Criteria:   • Entire stomach & duodenal loop   • No SI of pylorus & duodenal bulb   • Pylorus & duodenal bulb in profile   • Stomach centered at level of the pylorus
AP oblique (LPO) IR Size: 11x14 LW SID: 40"" Page #'s: 2:132,240	Positioning:   • Pt supine   • Body rotated 30°-60° to LPO pos (ave 45°) use 45° sponge to assist	CR Entrance & Angle:   • _|_ to center of IR   • Collimation:   • Best to Determine:   • Fundic portion of stomach	Eval Criteria:   • Entire stomach & duodenal loop   • No SI of pylorus & duodenal bulb   • Body of stomach centered in the radiograph   • Body & pylorus with double contrast visualization
Lateral IR Size: 11x14 LW or 14x17 LW for upright SID: 40"" Page #'s: 2:134,242	Positioning:   • Recumbent-right lateral or upright-left lateral	CR Entrance & Angle:   • _|_ to center of IR   • Collimation:   • Best to Determine:   • Anterior & posterior aspects of the stomach   • Pyloric & duodenal bulb	Eval Criteria:   • Entire stomach & duodenal loop   • Stomach centered at level of the pylorus   • NR shown by vertebrae
AP (/ AP Trendelenburg) IR Size: 14x17 LW SID: 40"" Page #'s: 2:136,244	Positioning:   • Pt supine   • (For Trendelenburg head of table lowered 15°-45° & is used to demonstrate hiatal hernias)	CR Entrance & Angle:   • _|_ to center of IR   • Collimation:   • Best to Determine:   • In supine position the pyloric portion of stomach is elevated and barium flows into & fills the fundus   • B/c of the elevation of the stomach, this best demonstrates the retrogastric portion of the duodenum & jejunum	Eval Criteria:   • Entire stomach & duodenal loop   • Double contrast exam of body, pylorus & duodenal bulb   • NR