Why is the posteroanterior (PA) rather than the AP projection recommended for a small bowel series?

What is the CR for the PA axial large bowel image?

Situation:  During a single-contrast barium enema, the radiologist detects a possible defect within the right colic flexure. Which of the following projections and/or positions best demonstrates this region of the colon?

The esophagus lies ____  to the trachea.

Which position/view for a large bowel study demonstrates the right colic flexure open?

What part of the small intestine does the most digestion take place?

The image above shows what position of an UGI?

Which projections/views taken during a barium enema will demonstrate the rectosigmoid area?1) lateral2) PA axial3) RPO

What is the average degree of body rotation for an AP oblique projection of the stomach and duodenum?

Which methods can be used to administer barium for a radiographic examination of the small intestine?1) by mouth2) enteroclysis3) reflux filling