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摘要目的用单层磁化传递(MT)成像评估放疗后纤维化已经取得了满意的成果。本次研究旨在通过肿瘤磁化传递率(MTR)与组织病原学的肿瘤消退程度分级比较来探讨多层MT成像评估放化疗后肿瘤反应的诊断价值。材料与方法30例局部直肠癌晚期(c T3-4和/或c N2)病人在放化疗后的8周行常规MRI检查,包括整个肿瘤的多层MT序列扫描。2名医生分别在MTR图上选取兴趣区,包含所有潜在残留肿
Abstract Objective To evaluate the postoperative fibrosis with single-layer magneto-optic transmission (MT) imaging and to obtain satisfactory results. The aim of this study was to evaluate the diagnostic value of multi-slice MT imaging in the evaluation of tumor response after chemoradiation by comparing tumor magnetization transmissibility (MTR) with histopathological tumor regression. MATERIALS AND METHODS Thirty patients with advanced rectal cancer (cT3-4 and / or cN2) underwent routine MRI examination 8 weeks after radiotherapy and chemotherapy, including multi-layer MT sequence scan of the entire tumor. Two doctors selected the region of interest on the MTR chart, including all potential residual swollen