3Beat G,Karen E,Howard A. Diagnosis work up of patients with suspected pancreas carcinoma[J]. Cancer, 1997,9(10):1780 - 1782.
4Steffen J, Kal J, Maliha S, et al. Pancreatic cancer: value of dual phase helical CT in assessing resectability[J]. Radiology, 1998,2(5):373 -275.
5David S, Howard A, Robert M, et al. Local staging of pancreatic canc er: criteria for unresectability of major vessels as revealed by pancreatic - phase, thin - section helical CT [J]. AJR, 1997,6(9):1439 -1441.
