【摘要】 目的 :探讨环杓关节及相邻结构的CT表现及多层螺旋CT(MSCT)容积重组对环杓关节结构的显示能力。方法 :2 8例无任何喉部症状的健康志愿者 ,在平静呼吸及Valsalva呼吸状态下分别行喉部薄层扫描并采用容积再现 (VR)技术进行图像三维重组 ,比较轴位与容积再现图像对环杓关节的显示情况。结果 :CT轴位图像上两侧环杓关节、梨状窝、声门裂显示对称者分别为 2 2例 (78.6% )、2 3例 (82 .1% )、2 6例 (92 .9% ) ,声带突、肌突显示率分别为 3 9.3 %、46.4%。VR图像上显示两侧环杓关节对称者 2 7例 (96.4% ) ,声带突、肌突显示率分别为 5 3 .6%、60 .7%。CT轴位图像与VR图像对环杓关节的显示差异有显著性意义 (t=4.994,P <0 .0 1)。结论 :正常环杓关节、声门裂、喉室均对称。MSCTVR图像对评价环杓关节解剖结构明显优于轴位图像。更多还原

【Abstract】 Objective:To evaluate the imaging features of cricoarytenoid joint (CAJ) and contiguous structures and the ability of three-dimensional volume rendering (VR) in visualization of CAJ.Methods:Twice thin-slice volume scans were performed in 28 volunteers during quiet breath and valsalva experiment respectively and then the volume data was sent to the work station for 3D reformation,the results of axial and VR images were analyzed and compared with each other.Results:The symmetry of bilateral CAJ,pyriform sinus,and glottis were revealed in 22 cases,23 cases and 26 cases,respectively.The vocal process and muscular process were demonstrated at rate of 39.3% and 46.4%.On VR images,the vocal process and muscular process were demostrated in a rate of 53.6% and 60.7%,and the symmetry of bilateral CAJ was revealed in 27 cases.There was significant difference in axial and VR in visualization of CAJ.Conclusion:The normal CAJ,vocal cord and ventricle were symmetric,VR is superior in assessing the laryngeal anatomy to axial images.更多还原