RT Journal Article SR Electronic T1 Detection of hepatic portal venous gas on emergent CT JF Emergency Medicine Journal JO Emerg Med J FD BMJ Publishing Group Ltd and the British Association for Accident & Emergency Medicine SP 889 OP 889 DO 10.1136/emj.2008.068395 VO 27 IS 11 A1 Kuan-Chun Hsueh A1 Shung-Sheng Tsou YR 2010 UL http://emj.bmj.com/content/27/11/889.abstract AB