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目的评估感兴趣区(ROI)的大小和定位对局部进展期直肠癌(LARC)病人的肿瘤ADC测量和观察者间变异的影响。方法回顾性纳入46例LARC病人。在放化疗(CRT)前和之后6～8周对病人进行包括DWI(b=0,500,1000)的
Objectives To assess the effect of size and location of ROI on tumor ADC measurements and interobserver variability in patients with locally advanced colorectal cancer (LARC). Methods Retrospectively enrolled 46 patients with LARC. Patients were included in the study, including DWI (b = 0, 500, 1000) before and after radiotherapy and chemotherapy (CRT)