Abstract: Objective: To study the standard and methods of resectability for carcinoma of head of pancreas using multihelical computed tomography (MHCT). Methods: From July 2001 to December 2005, MHCT was used for lamellar three-stage scanning on 34 patients with carcinoma of head of pancreas. The degree of invasion in major peripancreatic vessels was prospectively graded on a 0-5 scale and respectability of the carcinoma of head of pancreas was judged, based on involvement of contiguous organs around tumor. Results: The tumors can be removed in 17 of the 34 patients with carcinoma of head of pancreas, but radical resection was done in only 15 cases, with a sensitivity of 88.2% and a specificity of 89.5%. Conclusions: The resectability of the carcinoma of head of pancreas can be correctly judged by multihelical CT using the grading of vascular invasion of Raptopoulos in combination with the traditional grading method of Freeny. The clinical significance is apparent.