On abdominal X-rays, the small intestine is considered to be abnormally dilated when the diameter exceeds 3 cm.<ref name=medscape>{{cite web|url=http://emedicine.medscape.com/article/374962-overview|title=Small-Bowel Obstruction Imaging|website=[[Medscape]]|date=2016-09-22|author=Ali Nawaz Khan|accessdate=2017-02-07}}</ref><ref>{{cite web|url=http://www.radiologymasterclass.co.uk/tutorials/abdo/abdomen_x-ray_abnormalities/pathology_small_bowel_obstruction|title=Abdominal X-ray - Abnormal bowel gas pattern|website=radiologymasterclass.co.uk|accessdate=2017-02-07}}</ref>
In barium or capsule swallow studies, delayed small intestinal transit time can be diagnosed by a transit time from ingestion to presence in the cecum of over 6 hours.<ref>[https://books.google.se/books?id=PBrYCwAAQBAJ&pg=PA43 Page 43] in: {{cite book|title=The Netter Collection of Medical Illustrations: Digestive System: Part II - Lower Digestive Tract E-Book|author=James C Reynolds|edition=2|publisher=Elsevier Health Sciences|year=2016|isbn=9780323389358}}</ref><ref>Page 1961 in: {{cite journal|title=Hepato-gastroenterology|volume=50|publisher=Thieme|year=2003}} Issues 52-54}}</ref>
==Diseases==