MR Imaging of Endometrial Carcinoma for Preoperative Staging at 3.0 T: Comparison With Imaging at 1.5 T
MR Imaging of Endometrial Carcinoma for Preoperative Staging at 3.0 T: Comparison With Imaging at 1.5 T
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DOI：
10.1002/jmri.21879
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发表时间：
2009-09-01
影响因子：
4.4
通讯作者：
Nakamura, Hironobu
中科院分区：
文献类型：
--
作者：
Hori, Masatoshi;Kim, Tonsok;Nakamura, Hironobu
目的：前瞻性比较相同患者在3.0 T和1.5 T时的磁共振成像（MRI）对子宫内膜癌的术前评价。材料与方法：连续30例子宫内膜癌患者行3.0 T、1.5 T MRI及手术治疗。进行了定量和定性分析。两名放射科医生独立评估图像。将MR结果与手术病理结果进行比较。结果：3.0 T时t2加权图像的图像均匀性明显低于1.5 T时（P = 0.007）。3.0 T钆增强成像与1.5 T钆增强成像的图像均匀性和敏感性伪影评分差异无统计学意义（P = 0.09和0.36）。Kappa统计显示，两名放射科医生对t2加权图像的局部区域分期的观察者之间的一致性很好（Kappa >.6）。t2加权成像中肌层浸润、宫颈浸润和淋巴结转移的受者工作特征曲线下面积（Az）值分别为0.88 （3.0 T）对0.91 （1.5 T）、0.84对0.83、0.94对0.95。在3.0 T和1.5 T下成像，两种阅读器的Az值无显著差异（P < 0.35）。结论：3.0 T MRI在子宫内膜癌术前评估中与1.5 T成像具有同等的成像方式，但并不明显优于1.5 T成像。
Purpose: To prospectively compare magnetic resonance imaging (MRI) at 3.0 T and 1.5 T in the same patients for preoperative evaluation of endometrial carcinoma.Materials and Methods: Thirty consecutive patients with endometrial carcinoma underwent MRI at both 3.0 T and 1.5 T as well as surgery. Quantitative and qualitative analyses were performed. Two radiologists independently evaluated images. MR findings were compared with surgicopathologic findings.Results: Image homogeneity of T2-weighted images at 3.0 T was significantly inferior to that at 1.5 T (P = 0.007). The scores of image homogeneity and susceptibility artifacts were not significantly different between 3.0 T gadolinium-enhanced imaging and 1.5 T imaging (P = 0.09 and 0.36). Kappa statistics showed good interobserver agreement between the two radiologists for local-regional staging on T2-weighted images (kappa>0.6). The area under the receiver operating characteristic curve (Az) values for T2-weighted imaging in terms of myometrial invasion, cervical invasion, and lymph node metastases were 0.88 (3.0 T) versus 0.91 (1.5 T), 0.84 versus 0.83, and 0.94 versus 0.95 for reader 1, respectively. There were no significant differences between imaging at 3.0 T and at 1.5 T in Az values for either reader (P > 0.35).Conclusion: 3.0 T MRI is an equivalent imaging modality to 1.5 T imaging for presurgical evaluation of endometrial carcinoma, although not significantly superior to 1.5 T imaging.