It is “a form of line chart showing scales of the variables involved in a particular formula in a way that corresponding values for each variable lie in a straight line intersecting all the scales.”(22) Therefore we tried to establish a MET PET/CT-based nomogram model that uses easy-accessible imaging metrics and clinical features to add reliable predictive information for IDH mutational status in patients with gliomas. Here, IDH1 is linked to glioma.