MSCT斜矢状位重组图像观察颈动脉鞘周围淋巴结的价值

The value of oblique sagittal multiplanar reconstruction image obtained with multislice spiral CT to observe the lymph nodes around carotid sheath

目的:探讨多层螺旋CT斜矢状位图像显示颈动脉鞘周围淋巴结的显示效果。方法:选择因颈部肿块或结节就诊的门诊患者39例,行颈部各项同性扫描及对比剂增强扫描,然后分别进行轴位、冠状位、双侧斜矢状位重建,观察双侧颈动脉鞘周围显示淋巴结的数目。最后在工作站多方位重组图像观察淋巴结的数目,比较三种图像观察淋巴结的数目的百分率。结果:冠状位图像观察到得淋巴结数目多于轴位图像,双侧斜矢状位图像多于冠状位及轴位图像。斜矢状位图像与颈动脉鞘内血管及胸锁乳突肌走行一致,并与颈动脉鞘周围淋巴结长轴平行,可以直观显示淋巴结及血管的长轴。结论:双侧斜矢状位不但显示颈动脉鞘周围淋巴结数目上明显优于其他图像,而且可以真实直观地反映淋巴结与周围血管及肌肉的关系,将有助于颈部淋巴结的定位、定量诊断和治疗后随访观察。

Objective：To study lymph nodes around carotid sheath with oblique sagittal multiplanar reconstruction image obtained with multislice spiral CT.Methods：39 outpatients with cervical tumor or nodes were enrolled.Contrast enhanced neck MSCT isotropic volumetric data acquisition which allowed high resolution data reconstruction were evaluated for lymph node assessment in the axial,coronal and oblique sagittal plane.The numbers of lymph node around the carotid sheath of two sides were studied by three experienced radiologists.Results：More lymph nodes were observed from coronal plane images compared with axial images.More lymph nodes were observed from oblique sagittal plane images compared with axial and coronal images.Conclusion：The oblique sagittal image would be useful for the clinical application in the detection rate of lymph nodes.