摘要
目的:探讨64层CT低剂量扫描技术在踝关节隐匿性骨折中的应用。方法:68例常规X线检查阴性、临床高度怀疑骨折的患者行64层CT低剂量扫描和常规剂量扫描,并行MPR、VR后处理,比较2组扫描图像质量、诊断准确率及辐射剂量。结果:低剂量组与常规剂量组相比,CT图像质量及对踝关节隐匿性骨折的诊断准确率差异无统计学意义(P>0.05)。低剂量组辐射剂量较常规剂量明显下降,CT容积剂量指数和剂量长度乘积均降低了56%左右。结论:踝关节低剂量CT扫描能准确诊断踝关节隐匿性骨折,同时降低了患者的辐射剂量,完全能够取代常规剂量扫描。
Objective： To explore the value of low-dose CT technique in diagnosis of occult fracture of ankle joint with 64 slice spiral CT. Methods：Sixty eight cases with occult fracture of ankle joint underwent low-dose CT scan and routine CT scan, respectively. The raw image data was reconstructed using MPR and VR technique. The image quality,diagnostic accuracy and radiation dose were compared between two groups. Results： The image quality for low-dose group was little worse than routine dose group. The difference for image quality and diagnostic accuracy between two groups showed no statistical significance（P）〉 0.05）. The CTDIvol（ CT dose index volume, CTDIvol） and DLP （Dose Length Product, DLP） for low-dose group decreased by fifty six percent. Conclusion：Occult fracture of ankle joint can be visualized clearly with Low dose CT scan. The radiation dose decreases significantly as well. It can be utilized as a routine CT procedure for ankle joint.
出处
《中国中西医结合影像学杂志》
2013年第6期621-623,共3页
Chinese Imaging Journal of Integrated Traditional and Western Medicine
关键词
骨折
踝关节
体层摄影术
X线计算机
辐射剂量
Fractures, bone
Ankle joint
Tomography, X-ray computed
Radiation dose
