The Relativity Study between Low Radiation Dose and Image Quality in Multi-detector Spiral CT

The widespread use of CT in resent years has improved the effect of clinical diagnose.The most important problem in CT using is excessive radiation dose.AQSIQ released the Verification Regulation of JJG 1026-2007 and lower than dose upper limit was the first target in this regulation.From the view of diagnose;only the CT images of good quality can be useful to doctors.Unlimited reducing the scanning condition in order to reach the goal of lower dose will affect the image quality inevitably.Different scanning parameters will be analyzed here to find their influences on dose index and image quality,thus realize the best image quality at the lowest radiation dose level.Correlative institution should pay more attention to this problem in order to make effective apprise on the radiation control for patients as well as improve the quality of diagnose.