张宇萌,曹云太

传统MRI在直肠癌局部分期和形态学评估中具有高敏感性，但对新辅助放化疗（CRT）后疗效评估的敏感性有限。多参数MRI通过整合扩散加权成像（DWI）和灌注加权成像，突破形态学局限，提供功能与生物学信息。此外，联合纹理分析与多参数MRI的“异质性-微循环”模型为疗效预测提供了新方向。

多参数MRI；直肠癌；DWI

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