Abstract：
The differences of CT images under each situation of the gradual decrease imported points, which were measured on both sides of the model, were studied and analyses with the tested model, through the experiments of acoustic test and CT imaging. The results showed that the size of defect in CT images had a certain influence by the number of imported points reduce. But the location and shape of defect had a consistent with the actual. It was further proved that elastic wave CT could visualize reflect the distribution of concrete, and defect detection of concrete through the CT imaging was reliable.
