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Obstructions,including ileus,volvulus, and intussusception,often are demonstrated,double-contrast media barium enema is ideal for demonstrating diverticulosis,polyps, and mucosals changes. the right cloic flexure and teh ascending and sigmoid colon are seen "open" with out signinficant superimposition. The entire larege intestin is included with teh possible exceptiopn of the left colic flexure which is best demonstrated in LAO position.