| 庄晓曌,余深平,贺李,崔冀,陈创奇,赵晓娟,潘碧涛,李子平.3.0T MR背景抑制扩散加权成像诊断盆腔恶性肿瘤淋巴结转移[J].中国医学影像技术,2012,28(10):1856~1860 |
| 3.0T MR背景抑制扩散加权成像诊断盆腔恶性肿瘤淋巴结转移 |
| 3.0T MR DWIBS in diagnosis of lymph nodes metastasis of malignant pelvic tumors |
| 投稿时间：2012-03-13 修订日期：2012-06-06 |
| DOI： |
| 中文关键词: 盆腔肿瘤 扩散磁共振成像 淋巴结 表观扩散系数 |
| 英文关键词:Pelvic neoplasms Diffusion magnetic resonance imaging Lymph nodes Apparent diffusion coefficient |
| 基金项目:广东省科技计划项目(2010B080701037)。 |
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| 中文摘要: |
| 目的 探讨3.0T MR背景抑制扩散加权成像(DWIBS)诊断盆腔淋巴结转移的价值。 方法 60例盆腔恶性肿瘤患者接受常规MR＋DWI检查,之后均接受肿瘤切除＋盆腔淋巴结清扫手术。对照术后病理结果,确定转移性和非转移性淋巴结,测量淋巴结的ADC值以及长、短径;比较ROC曲线下面积(AUC),评估淋巴结的ADC值及长、短径对鉴别诊断淋巴结良恶性的价值。 结果 确定转移性淋巴结82个,非转移性淋巴结224个:转移性与非转移性淋巴结的短径(P=0.001)、短径/长径(P=0.008)差异均有统计学意义,长径差异无统计学意义(P=0.480);转移性与非转移性淋巴结的ADC值分别为(0.86±0.20)×10-3 mm2/s和(1.05±0.30)×10-3 mm2/s(P<0.001),淋巴结短径≥10 mm组及<10 mm组内非转移性淋巴结的ADC值均高于转移性淋巴结(P<0.01);淋巴结短径、短径/长径的AUC分别为0.623、0.599,所有淋巴结、短径≥10 mm组及短径<10 mm组淋巴结的ADC值的AUC分别为0.740、0.792及0.731,故短径≥10 mm组淋巴结的ADC值用于转移性淋巴结诊断的价值最高,敏感度为90.5%,特异度为68.2%。 结论 3.0T MR DWIBS诊断盆腔恶性肿瘤淋巴结转移具有明显优势;利用ADC值诊断淋巴结转移的准确率明显高于淋巴结径线。 |
| 英文摘要: |
| Objective To evaluate the efficacy of diffusion-weighted imaging with background signal suppression (DWIBS) using 3.0T MR scanner for diagnosing lymph nodes metastasis in patients with pelvic malignant tumors. Methods Totally 60 patients with pelvic malignant tumor underwent preoperative routine MRI+DWI examination and tumor dissection+pelvic lymph node dissection within 2 weeks. Metastatic and non-metastatic lymph nodes were confirmed by pathology after operation. ADC values, long-axis and short-axis diameters of lymph nodes were measured and statistical analyzed. Diagnostic efficacy of ADC values, long-axis and short-axis diameters in differentiating metastatic lymph nodes from non-metastatic lymph nodes by comparing area under curve (AUC) of ROC were assessed. Results Eighty-two metastatic lymph nodes and 224 non-metastatic lymph nodes were identified. There was statistical difference in short-axis diameter (P=0.001) and short-long axis diameter ratio (P=0.008), but no statistical difference was found in long-axis diameter (P=0.480) between metastatic lymph nodes and non-metastatic lymph nodes. The ADC values of metastatic lymph nodes and non-metastatic lymph nodes were (0.86±0.20)×10-3 mm2/s and (1.05±0.30)×10-3 mm2/s, respectively (all P<0.001). The ADC values of non-metastatic lymph nodes are higher than metastatic lymph nodes in both short-axis diameter ≥10 mm or <10 mm group (P<0.01). AUC of short-axis diameter and short-long axis diameter ratio was 0.623 and 0.599, respectively. AUC of ADC values of all lymph nodes, short-axis diameter ≥10 mm and <10 mm lymph nodes was 0.740, 0.792 and 0.731, respectively. ADC value of short-axis diameter ≥10 mm lymph nodes got the highest value for diagnosing metastatic lymph node, its sensitivity was 90.5%,and specificity was 68.2%. Conclusion DWIBS using 3.0T MR scanner has distinct advantages in detecting metastatic lymph nodes of pelvic malignant tumor. ADC value has significant accuracy, higher than lymph node diameters. |
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