• 
    

    
    

      99热精品在线国产_美女午夜性视频免费_国产精品国产高清国产av_av欧美777_自拍偷自拍亚洲精品老妇_亚洲熟女精品中文字幕_www日本黄色视频网_国产精品野战在线观看

      ?

      Diagnosis value of 3.0 T diffusion-weighted imaging with background suppression magnetic resonance for metastatic lymph nodes in rectal cancer

      2012-08-15 00:54:32ZhuangXiaozhao
      外科研究與新技術(shù) 2012年1期

      /Zhuang Xiaozhao

      (莊曉瞾,Dept Radiol,Affil Hosp Sun Yat-sen Univ,Guangzhou 510080)…∥Chin J Gastrointest Surg.-2011,14(8).-842~845

      ObjectiveTo evaluate the diagnostic value of 3.0 T diffusion-weighted imaging with background suppression(DWIBS)magnetic resonance(MR)for lymph node metastasis in rectal cancer.MethodsThirty-five patients with rectal cancer who underwent preoperative routine MRI+DWI examination were enrolled in the study and were treated by rectal cancer resection plus lymph node dissection.Metastatic and non-metastatic lymph nodes were confirmed by postoperative pathology.Apparent diffusion coefficient(ADC)values,long-axis and short-axis diameters of lymph nodes were measured.Receiver operating characteristic(ROC)curve was used to assess the diagnostic efficacy of ADC,long-axis and short-axis diameters for differentiating metastatic lymph nodes from non-metastatic lymph nodes.ResultsA total of 151 lymph nodes were confirmed with exact location in 35 patients.Sixty-five metastatic lymph nodes and 86 nonmetastatic lymph nodes were identified.The ADC values of metastatic lymph nodes and non-metastatic lymph nodes were(0.86 ±0.14)×10-3and(0.94 ±0.16)×10-3mm2/s respectively.The long-axis diameter were(9.78 ±3.13)and(7.90 ±1.77)mm,respectively.The short-axis diameter were(7.65 ± 2.00)and(6.45 ±1.19)mm,respectively.There were statistically significant differences between metastatic and non-metastatic lymph nodes in ADC values,long-axis diameter,and short-axis diameter(all P <0.01).The areas under the ROC curve of ADC value,long-axis diameter,and shortaxis diameter were 0.648,0.706,and 0.692,respectively.Optimal cutoff values for these parameters were 1.05×10-3mm2/s,7.95 mm,and 5.90 mm,respectively,and the corresponding sensitivities and specificities were 93.8%and 30.2%,75.4%and 61.6%,90.8%and 38.4%.ConclusionQuantitative measurement of ADC value may reflect the degree of diffusion restriction of metastatic lymph nodes by DWIBS at 3.0 T MR.Accurate diagnosis of metastatic lymph nodes in rectal cancer demands comprehensive evaluation combining ADC value with diameter measurement.11 refs,4 figs,2 tabs.

      西和县| 会泽县| 象州县| 张北县| 台北县| 玉屏| 周宁县| 陕西省| 铁力市| 玛纳斯县| 青浦区| 化州市| 顺义区| 新沂市| 南华县| 讷河市| 塔城市| 柘荣县| 保亭| 庄河市| 三明市| 高州市| 合肥市| 鹤山市| 林芝县| 奇台县| 维西| 红桥区| 资兴市| 松滋市| 天等县| 温泉县| 桦甸市| 孝昌县| 酒泉市| 元氏县| 关岭| 河津市| 红安县| 封开县| 乾安县|