个性化低剂量螺旋CT扫描在胸腰椎外伤检查中的应用

祝华强; 罗东梅; 曹丽; 梁明莉; 游蕊; 吴炳云

doi:10.15953/j.1004-4140.2019.28.01.12

个性化低剂量螺旋CT扫描在胸腰椎外伤检查中的应用

1. 中国科学院大学深圳医院西院区放射科, 广东深圳 518106;
2. 东莞市石碣医院放射科, 广东东莞 523290

基金项目:

东莞市社会科技发展（一般）项目（201750715011313）。

详细信息

作者简介:
祝华强^*(1978-),男,硕士,中国科学院大学深圳医院放射医学副主任医师,主要从事影像诊断工作,Tel:13316639739,E-mail:dgzhuhuaqiang@163.com。

中图分类号: R812;R445
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出版历程
- 收稿日期: 2018-05-22
- 网络出版日期: 2021-11-05

Application of Personalized Low Dose Spiral CT Scanning in the Examination of Thoracolumbar Trauma

1. Radiology department of University of Chinese Academy of Sciences Shenzhen Hospital (Guangming), Shenzhen 518106, China;
2. Radiology department of the Shijie's Hospital, Dongguan 523290, China

摘要

摘要: 目的：探讨根据腰围个体化降低管电流在胸腰椎外伤多层螺旋CT检查中的可行性和方法。方法：取牛腰椎段，做成55~120cm腰围的CT模型，其他扫描参数不变，以25~300mA扫描椎体，得出图像质量合格的管电流值。131例腰椎CT检查的非外伤病例进行正常椎体常规和低剂量条件扫描，筛选出合适低剂量扫描条件；43例外伤胸腰椎体实施筛选的低剂量扫描。比较分析断层、MPR和VR、MIP图像。结果：CT扫描管电流与腰围相关性高，Pearson相关系数为0.994；以管电流为自变量，腰围为因变量，得出回归方程y=1.053x-33.187，R²=0.984。低剂量扫描辐射剂量较常规剂量扫描明显减低；骨皮质、椎管内结构、椎管旁软组织及图像整体质量（骨窗及软组织窗）的图像质量与常规剂量扫描图像质量比较，差异有统计学意义，它们的评分值均达到良好和可接受程度；VR、MIP图像优良率达到93%。结论：根据腰围个体化低剂量多层螺旋CT对胸腰椎外伤的检查是可行的，获得的图像以及三维后处理图像的质量能满足临床诊断需要，可应用于胸腰椎外伤检查。
- 个性化 /
- 剂量 /
- 胸腰椎 /
- 体层摄影术 /
- X线计算机
Abstract: Objective: To explore the feasibility and methods of reducing the tube current personalized based on the waistline in Multislice spiral CT examination of thoracolumbar trauma. Methods: the CT model of 55~120cm waistline was obtained from bovine lumbar segments. The vertebral body was scanned with 25~300mA and other scanning parameters were un-changed. The tube current value was obtained when the image quality was standard. First 131 non traumatic cases of lumbar CT examination were scanned for the normal and low dose conditions, and the suitable low dose scanning conditions were screened. 43 cases of thoracolumbar trauma centrums were scaned for the routine and screening low dose scanning. The images of faults and MPR and VR and MIP were comparatively analyzed. Results: the correlation between the current of CT scanning tube and the waist circumference is high; the correlation coefficient of Pearson is 0.994. The regression equations y=1.053x-33.187, R²=0.984 was derived with the tube current as argument and waistline as the dependent variable. The dose of low dose scanning was significantly lower than that of the conventional dose scanning; the image quality in the bone cortex, the spinal canal structure, the spinal canal soft tissue and the overall image quality (bone window and soft tissue window) was significantly different from that of the conventional dose group, but their scores were all good and acceptable; The good rate of VR and MIP reached 93%. Conclusion: the examination of thoracolumbar trauma on low-dose multislice spiral CT based on waistline is feasible. The images obtained and the quality of the post-processing images can meet the needs of clinical diagnosis and can be applied to the examination of thoracolumbar trauma.
- personalized /
- dose /
- thoracolumba /
- tomography /
- X-ray computed

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1.	沈梓璇，王晓野，卢晓娟. 腰椎检查中运用螺旋CT低剂量扫描对患者辐射剂量以及图像评分的影响分析. 影像研究与医学应用. 2021(22): 108-109 . 百度学术
2.	吴小林，孙献勇. 健康体检中多排螺旋CT低剂量扫描胸部的临床应用分析. 影像研究与医学应用. 2020(24): 19-20 . 百度学术