多层螺旋CT三维成像在肋软骨骨折诊断中的应用

Application of 3D Multislice Helical CT in Diagnosis of Costicartilage Fracture

目的:探讨多层螺旋CT(MSCT)三维重组在肋软骨骨折诊断中的价值。方法:对50例正常对照组和19例胸部外伤临床拟诊肋软骨骨折患者组行多层螺旋CT容积扫描和薄层重建,于工作站上进行VR、MIP、MPR三维图像重组,由2位有经验的放射科医师对后处理图像进行观察。结果:所有受检者均获得较满意的重组图像,19例胸部外伤患者,CT共发现肋软骨骨折23处,肋骨骨折8处。螺旋CT三维重组图像能清晰显示骨折部位、数目及断端移位情况;肋软骨骨折三维重组图像表现特征包括肋软骨钙化中断伴断端错位和肋软骨条状略高密度影的不连续。结论:多层螺旋CT三维成像能清晰显示肋软骨骨折的部位、形态,为肋软骨骨折的诊断开创了一条全新途径,可望成为检测肋软骨骨折的最佳影像学方法。

Objective： To investigate the value of multislice CT （MSCT） in diagnosis of costicartilage fracture. Methods： Multislice CT volume scanning was performed in 50 normal persons and 19 thoracic trauma patients who were suspected of costicartilage fracture. All images were reconstructed into thin slices and transferred into 3D workstation. Images such as volume rendering （VR） ,maximum intensity projection （MIP）, multiplanar reformation （MPR） were obtained. All the images were observed and analyzed by two experienced radiologists. Results：All reconstruction images could show the costal cartilage clearly. In 19 thoracic trauma patients, 23 costicartilage fractures and 8 rib fractures were revealed by MSCT,3D reconstruction images can effectively and clearly reveal the costicartilage fracture line, number of fracture and displacement. MSCT finding included interruption of calcified costal cartilage with obvious displacement in 13 cases, focal discontinuity of costicartilage in 5 cases. Conclusion：3D reconstruction technique of MSCT can display the position and pattern of costicatilage fracture clearly, is a new method to diagnose costicartilage fracture. It may be considered as the best imaging method in detecting the costicartilage fracture.