%0 Dataset %T A study of nonuniform CTV to PTV margin expansion incorporating both rotational and translational uncertainties %J National Cryosphere Desert Data Center %I National Cryosphere Desert Data Center(www.ncdc.ac.cn) %U http://www.ncdc.ac.cn/portal/metadata/0cd6b394-0d19-4b9c-a8a2-c75ec4440874 %W NCDC %R 10.12072/ncdc.imp.db2903.2023 %A Xiao Guoqing %K Heterogeneous;ctv-prtv edge expansion;vertebral metastasis targets %X Based on the statistical model, a non-uniform spreading method from CTV to PTV is proposed. Under the condition of the same confidence, considering the influence of the uncertainty of rotation and translation on the boundary of CTV and PTV, the non-uniform CTV-PTV is expanded. The volume of PTV after non-uniform expansion is smaller, which is conducive to the protection of nearby organs