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目的比较3DT2加权快速自旋回波(TSE)与多平面2DT2加权TSE对于侵袭性子宫颈癌的评估。方法 75个子宫颈癌病人进行了3.0TMRI盆腔检查,均使用了5mm层厚的多平面2D(总时间为12min25s)以及1mm层厚的冠状位3DT2加权TSE序列扫描(7min20s)。对信噪比(SNR)进行定量分析,对影像质量进行定性分析。对45例接受根治性子宫切除术的病人进行了局部区域的分期。结果 3D成像中子宫颈癌的预估SNR及肿瘤相关的对比度显著增高(P<0.0001)。3D序列肿瘤的显示更好,但2D序列肿瘤边缘的锐度更高。两个序列整体的影像质量没有显著差异(P=0.38)。对于诊断宫旁浸润、阴道浸润和淋巴结转移的准确性、敏感性及特异性,两者没有明显差异。结论除了更短时间的MR数据采集,3DT2加权多平面重组影像在整体影像质量和子宫颈癌的分期准确度上大体相当于2DT2加权成像,但是对于肿瘤边缘的锐度显示还是有局限性。要点①对于子宫颈癌分期,3DT2加权序列等同于2DT2加权序列。②冠状位3D数据采集可以减少检查时间。③3D序列SNR和肿瘤相关的显著性明显更高。④3DT2加权重组影像对于肿瘤边缘的锐度显示不佳。
Objective To compare the evaluation of 3DT2-weighted fast spin echo (TSE) and multiplanar 2DT2-weighted TSE for invasive cervical cancer. METHODS: Thirty-five cervical cancer patients underwent 3.0 TMRI pelvic examination using a multiplanar 2D 2D (total time 12 min 25 s) with 5 mm layer thickness and coronal 3DT2-weighted TSE sequence scan (7 min 20 s) with 1 mm slice thickness. The signal to noise ratio (SNR) for quantitative analysis of the qualitative analysis of image quality. Forty-five patients undergoing radical hysterectomy were staged locally. Results The estimated SNR and tumor-related contrast of cervical cancer in 3D imaging were significantly higher (P <0.0001). 3D sequence tumors show better, but 2D sequence tumor edges have higher sharpness. There was no significant difference in the overall image quality between the two sequences (P = 0.38). For the diagnosis of uterine infiltration, vaginal invasion and lymph node metastasis accuracy, sensitivity and specificity, there is no significant difference between the two. Conclusion In addition to shorter MR data acquisition, 3DT2-weighted MLC images are roughly equivalent to 2DT2-weighted imaging in terms of overall image quality and staging accuracy of cervical cancer, but there are still limitations to the sharpness of tumor margins. Points ① For staging of cervical cancer, the 3DT2-weighted sequence is equivalent to the 2DT2-weighted sequence. Coronal 3D data acquisition can reduce the inspection time. ③ 3D sequence SNR and tumor-related significantly higher. ④ 3D2 weighted image reconstruction for the sharp edge of the tumor showed poor.