Abstract: Diffusion weighted imaging with background suppression(DWIBS)has been used more and more in tumor screening,primary differentiating benign or malignant tumor and evaluating effect of tumor therapy.There are many researches about DWIBS these years,and the results consider that DWIBS is useful in evaluating malignant tumor and metastatic tumor,but at the same time we must confess DWIBS isn't perfect.This review illustrates the researches about DWIBS,potential applications of DWIBS and the limitation of DWIBS.