Tested by comparing CTP images data of the CBV , CBF and MTT images of patients who want to be analyzed. Those images are images from the same time an same CT machine. The Threshold value of CBV equals to 2.5 mliiOOg (±I.S) , Threshold value of the CBF equals to 20 mIiIOOg/min(±IO) and Threshold value of the MTT equals to 7.5 sec (±4.S) are used in the experiment.