Department of Radiology, Koç University School of Medicine, İstanbul, Turkey.
Department of General Surgery, Koç University School of Medicine, İstanbul, Turkey.
Diagn Interv Radiol. 2019 May;25(3):175-182. doi: 10.5152/dir.2019.18189.
MRI has a pivotal role in both pretreatment staging and posttreatment evaluation of rectal cancer. The accuracy of MRI in pretreatment staging is higher compared with posttreatment evaluation. This occurs due to similar signal intensities of tumoral and posttreatment fibrotic, necrotic, and inflamed tissue. This limitation occurs with conventional MRI of the rectum with morphologic sequences. There is a need towards increasing the accuracy of MRI, especially for posttreatment evaluation. The term multiparametric MRI implies addition of functional sequences, namely, diffusion and perfusion to the routine protocol. This review summarizes the technique, potential implications and previously published studies about multiparametric MRI of rectal cancer.
MRI 在直肠癌的术前分期和术后评估中都具有关键作用。与术后评估相比，MRI 在术前分期中的准确性更高。这是由于肿瘤组织和术后纤维化、坏死和炎症组织的信号强度相似所致。这种局限性发生在常规直肠 MRI 形态学序列中。需要提高 MRI 的准确性，特别是在术后评估方面。“多参数 MRI”一词意味着在常规方案中添加功能序列，即扩散和灌注。这篇综述总结了直肠癌多参数 MRI 的技术、潜在意义和已发表的研究。
