Objective:To study the special values of the time phases in liver enhancement scanning with multi-slices helical CT.Methods:The relationship between the image features and the time phases was retrospectively analyzed with 143 cases that underwent liver enhancement scanning with multi-slices helical CT.Results:The time phases of liver enhancement scanning included hepatic artery earlier phase,hepatic artery metaphase,hepatic artery advanced phase,hepatic portal venous phase,hepatic portal venous-hepatic venous phase,hepatic venous phase and lag period.Conclusion:The different image features have the special value in the different time phases when liver was scanned with multi-slices helical CT.They ought to be differently treated and used according to the different objectives of liver enhancement scanning.

Through analysis of the current situation of clinical medical interns and combining the teaching features of the medical imaging,we explored the importance and methods of the medical imaging short-term training to improve the clinical teaching quality and the intern's comprehensive quality.