Optimization of Injection Protocol for Spiral CT Portography and its Clinical Application / 实用放射学杂志

ABSTRACT

Objective To optimize the injection protocol of spiral CT portography(SCTP) and to evaluate its diagnostic value.Methods 48 normal individuals were randomly divided into three groups with different injection rates of contrast material:4 ml/s,3 ml/s and 2 ml/s.Single-level dynamic CT was performed through the trunk of portal vein.In each scan,time-attenuation curves of the portal vein,liver and P-L(the difference between portal vein and liver)were obtained.And SCTP was prospectively performed in 30 cases.The SCTP findings in a variety of disease were analyzed and the quality of SCTP images was assessed.Results ①The groups of 4 ml/s and 3 ml/s had greater peak enhancement of the portal vein and P-L than the group of 2 ml/s(?