2.5-3 cm in diameter with three air-fluid levels in erect film (candy-cone appearance) is a helpful feature.# Enteroclysis is proving to be reliable for investigating suspected small bowel obstruction and can differentiate postoperative obstruction from ileus.# Although enteroclysis is more reliable in patients with partial, incomplete and intermittent obstruction, CT is now recommended as the technique of choice for the investigation of suspected intestinal obstruction. Small intestinal obstruction is differentiated from paralytic ileus on CT by demonstrating a transitional zone between dilated loops of small intestine proximal to the site of obstruction and collapsed loops of small intestine or colon distal to the site of obstruction.Educational points:X-ray appearanceDiagnosis'String of beads' signSmall bowel obstructionCupola signPneumoperitoneumRigler's double wall signPneumoperitoneumFootball signPneumoperitoneumCoffee bean signSigmoid volvulus (and Strangulated bowel obstruction)Pseudobilroth appearanceCrohn's disease'Bird of pre/ signSigmoid volvulus'Coiled-spring' appearanceIntussusception'Claw' signIntussusception'Saw-toothed' appearanceDiverticulosisHat signColonic polyp'Apple core' appearanceCarcinoma colon'Thumb-print' signIschemic colitisReverse '3' sign of FrostburgCarcinoma head of pancreasMoulage signMalabsorption (Celiac disease)String sign of KantorCrohn's diseaseString sign (Ba Meal)CHPSBull's eye lesionLeiomyoma (GIST) & Liver candidiasis (USG)Mucosal granularityEarliest sign of ulcerative colitis on Ba enema">