1[1]Esteban JM, Maldonado L, Sanchiz V, et al. Activity of Crohn′s disease assessed by colour Doppler ultrasound analysis of the affected loops[J]. Eur Radiol, 2001, 11(8): 1 423-1 428.
2[2]Jakab Z, Cserepes E, Tulassay Z. Development and validation of an ultrasonographic activity index of Crohn′s disease[J]. Eur J Gastroenter of Hepatol, 2000, 12(12):1 355-1 356.
3[3]Van Oostayen JA, Wasser MN. Use of Doppler ultrasound in Crohn′s disease[J]. Gut, 2000, 47(1):156-157.
4[4]Van Oostayen JA, Wasser MN, Griffioen G, et al. Activity of Crohn′s disease assessed by measurement of superior- mesenteric artery flow with Doppler ultrasound[J]. Neth J Med, 1998, 53(6):S3-S8.
5[5]Nemcek AA Jr. Superior mesenteric artery Doppler waveform changes in response to inflammation of the ileocecal region[J]. Abdom Imaging, 1997, 22(5):487-488.