4Piekhardt PJ. Noninvasive radiologie imaging of the large intestine: a valuable complement to optical colonoscopy [ J]. Curr Opin Gastroenterol, 2010, 26(1): 61-68.
5Johnson CD. CT colonography: coming of age [J] . Am J Roentgenol, 2009, 193 (5): 1239-1342.
6Rockey DC. Computed tomographic colonography: current perspectives and future directions [ J]. Gastroenterology, 2009, 137 ( 1 ) : 7-14.