| 汤群锋,沈钧康,冯一中,王灌忠,张彩元,钱铭辉.0.5T磁共振动态增强对进展期胃癌术前TNM分期的评价[J].中国医学影像技术,2006,22(1):88~91 |
| 0.5T磁共振动态增强对进展期胃癌术前TNM分期的评价 |
| Evaluation of dynamic 0. 5T MRI in preoperative TNM-stagingof advanced gastric carcinoma |
| 投稿时间：2005-06-21 修订日期：2005-09-15 |
| DOI： |
| 中文关键词: 胃肿瘤 磁共振成像 动态增强 TNM分期 |
| 英文关键词:Stomach neoplasms Magnetic resonance imaging Dynamic enhancement TNM-staging |
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| 中文摘要: |
| 目的 观察胃癌的动态增强MRI 表现,评价动态增强MRI 对进展期胃癌术前TNM 分期的价值。方法 对35例经胃镜证实的进展期胃癌患者进行前瞻性0. 5T 磁共振动态增强研究。观察胃癌的动态增强MRI 表现,对胃癌浸润范围、深度、淋巴结转移以及远处转移情况进行术前评价,并与术后病理对照。结果 胃癌动态增强表现为两种形式:不规则强化型(24 例) 和分层强化型(11例)。33 例胃癌强化峰值时间为53～107 s。动态增强MRI对胃癌T分期准确性为82.9 %(29/35),对浆膜层侵犯的敏感性和特异性分别为96.3 %(26/27)和75.0%(6/8);对N 分期准确性为53. 3 %(16/30),低估36.7%(11/30),高估10.0%(3/30) ,淋巴结有无转移的敏感性和特异性分别为63.6 %(14/22)和62.5%(5/8);对M 分期准确性为100 %(7/7)。结论 磁共振动态增强对评价进展期胃癌TNM 分期有重要价值。 |
| 英文摘要: |
| Objective To observe MRI manifestation of gast ric carcinoma, and to evaluate the usefulness of dynamic MRI in the preoperative TNM2staging of advanced gast ric carcinoma. Methods Dynamic 0.5T MRI was performed on 35 patient swith advanced gast ric carcinoma. The manifestation of gast ric carcinoma,the extension and depth of the cancer invasion,re-gional lymph node metastasis and distant metastasis were prospectively assessed for and were compared with the pathological findings.Results Two patterns of manifestation on dynamic cont rast2enhanced MR imaging were observed:irregularly (n=24) and delaminated enhancement (n= 11) . The peak time of enhancement was 53 - 107 s in 33 cases. The accuracy of dy-namic MRI in determining T2staging was 82. 9 % (29/ 35). The sensitivity and specificity for the presence or absence of ex-t raserosal invasion were 96. 3 % (26/ 27) and 75.0 % (6/8), respectively. The accuracy of N2staging was 53.3 % (16/30),in which understaging and overstaging were noted in 36.7 % (11/30) and 10.0%(3/30),respectively. The sensitivity and specificity for the presence or absence of lymph node metastasis were 63.6 %(14/22)and 62.5 %(5/8),respectively. The accuracy of M-staging was 100 %(7/7).Conclusion Dynamic MR imaging is very useful for TNM2staging of advanced gas-tric carcinoma. |
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