定量MRI诊断直肠癌淋巴结转移的研究进展

Research progress of MRI in the diagnosis of lymph node metastasis of rectal cancer

评估直肠癌淋巴结转移对治疗和预后至关重要。常规MRI诊断直肠癌淋巴结转移主要依据淋巴结的短径和形态学特征,诊断效能较低。定量MRI包括动态增强MRI(DCE-MRI)、动态磁敏感增强MRI(DSC-MRI)、单指数模型扩散加权成像(DWI)、扩散峰度成像(DKI)、体素内不相干运动扩散加权成像(IVIM-DWI)等,可以对直肠癌淋巴结及原发灶进行定量分析,从而有助于诊断淋巴结转移。就常规MRI及定量MRI诊断直肠癌淋巴结转移的研究进展予以综述。

Evaluation of lymph node metastasis of rectal cancer is very important for treatment and prognosis.Conventional MRI relies on the short diameter and morphological characteristics of lymph nodes to diagnose lymph node metastasis,and the diagnostic efficiency is low.Quantitative MRI includes dynamic contrast-enhanced MRI(DCE-MRI),dynamic susceptibility contrast-enhanced MRI(DSC-MRI),diffusion weighted imaging(DWI),diffusion kurtosis imaging(DKI),and intravoxel incoherent motion diffusion weighted imaging(IVIM-DWI),which can be used to quantitatively analyze lymph nodes and primary lesions,is helpful for better diagnosis of lymph node metastasis.This paper reviews the research progress of conventional MRI and quantitative MRI in the diagnosis of lymph node metastasis of rectal cancer.