目的分析采集参数对纹理结构的影响,比较纹理分析与肝脏CT灌注对直肠癌病人生存的预测能力,从而评价肝CT影像对于纹理分析的实用性。方法研究包括模 OBJECTIVE: To analyze the effect of acquisition parameters on the texture structure and to compare the predictive ability of texture analysis and liver CT perfusion for the survival of patients with rectal cancer so as to evaluate the practicability of liver CT images for texture analysis. Methodological studies include modalities