Changes

*Right upper quadrant abdominal '''[[ultrasonography of cholecystitis]]''' is generally the first exam of choice.<ref name=NEJM2008>{{cite journal|last1=Strasberg|first1=SM|title=Clinical practice. Acute calculous cholecystitis.|journal=The New England Journal of Medicine|date=26 June 2008|volume=358|issue=26|pages=2804–11|pmid=18579815|doi=10.1056/nejmcp0800929}}</ref><ref name="pmid7979854">{{cite journal |vauthors = Shea JA, Berlin JA, Escarce JJ, Clarke JR, Kinosian BP, Cabana MD, Tsai WW, Horangic N, Malet PF, Schwartz JS |title=Revised estimates of diagnostic test sensitivity and specificity in suspected biliary tract disease |journal = Arch. Intern. Med. |volume = 154 |issue = 22 |pages = 2573–81 |date = November 1994 |pmid = 7979854 |doi = 10.1001/archinte.154.22.2573 }}</ref><ref name="pmid3893388">{{cite journal |vauthors = Fink-Bennett D, Freitas JE, Ripley SD, Bree RL |title = The sensitivity of hepatobiliary imaging and real-time ultrasonography in the detection of acute cholecystitis |journal = Arch Surg |volume = 120 |issue = 8 |pages = 904–6 |date = August 1985 |pmid = 3893388 |doi = 10.1001/archsurg.1985.01390320028004 }}</ref>

*'''[[Abdominal CT]]''' may be used if complications such as perforation or gangrene are suspected.<ref name="Friedman 2015">Friedman L.S. (2015). Liver, Biliary Tract, & Pancreas Disorders. In Papadakis M.A., McPhee S.J., Rabow M.W. (Eds), Current Medical Diagnosis & Treatment 2015</ref> In adults, acute abdominal symptoms that are rather unspecific also indicate CT.<noinclude>