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The Evaluation of Preoperative Staging of Advanced Gastric Carcinomas with <?xml:namespace prefix = st1 ns = "urn:schemas-microsoft-com:office:smarttags" />Spiral CT and MRI
李健丁 张瑞平 李华兵 张华
山西医科大学第一医院放射科，太原 030001
Jian－ding Li，Rui－ping Zhang，Hua－bing Li，Hua Zhang
Department of Radiology，the First Affiliated Hospital，Shanxi Medical University，Taiyuan 030001，China
Abstract
Objective：To evaluate the diagnostic accuracy of spiral CT and magnetic resonance imaging for preoperative staging of advanced gastric carcinomas.
Method：With water filling，spiral CT and MRI examination was performed in 10 normal persons and 30 cases of advanced gastric neoplasma diagnosed by the operation，SCT and MR dynamic enhanced scan was also applied. Spiral CT and MRI finding were compared with postoperative pathology.
Results：The accuracy of T staging with SCT and MRI were 83.3％（25/30）and 90.0％（27/30）；The accuracy of SCT and MRI features for lymph node metastasis was 75.0％ and 52.3％；The accuracy of SCT and MRI in M staging was 80％ and 100％.
Conclusion：MRI is superior to SCT in the evaluation of T－staging and M－staging. However，MRI has limitation in the evaluation of lymph node metastasis .
Key words：Stamach neoplasmas；Spiral CT；Magnetic resonance；Staging
胃癌是我国消化道最常见的恶性肿瘤之一，术前对胃癌做出正确、合理的分期对制订胃癌治疗方案及判断预后有着重要的意义。螺旋CT多期增强扫描的应用，大大提高了胃癌分期的准确性。随着MRI快速成像技术的发展，并由于其本身所固有的许多优点（多平面成像、高组织分辨力及无辐射），使MR对胃癌的术前分期准确性的判断有望提高，本研究旨在比较螺旋CT与MRI对胃癌术前分期的影像学检查的价值。 | 
