The MSCT scans were acquired by 16 slices CT (GE Medical Systems, Milwaukee, Wis). All of the images were transferred to the workstation (Advantage Windows 4.1, GE Medical Systems), and reconstructed by MPVR (multi-planar volume reconstruction).

• 多层螺旋CT采用16层多层螺旋CT机(GE Medical Systems，Milwaukee，Wis)，所得图像传至工作站(Advantage Windows4.；1，GE Medical Systems)进行MPVR重建并由3位放射医师分析图像，给出诊断及淋巴结相关分期结论。 淋巴结分组按照Korst提出的食管癌淋巴结组简化分组标准进行分组；