2ZALCMAN M, SY M, DONCKIER V, et al. Helical CT signs in the diagnosis of intestinal ischemia in small-bowel ob- struetion[J]. AJR. American Journal of Roentgenology, 2000, 175(6) : 1601-1607.
3KIRCHMAY R W, MUHLMANN G, ZITT M, et al. Gall- stone ileus: rare and still controversial[J]. ANZ Journal of Surgery, 2005,75(4) :234 238.