| 64层螺旋CT螺距的不同设置在新型冠状病毒感染肺炎中筛查应用探讨 |
| |
| 引用本文： | 常鑫,邓刚,王旭,徐同江,尹晓明.64层螺旋CT螺距的不同设置在新型冠状病毒感染肺炎中筛查应用探讨[J].CT理论与应用研究,2020,29(5):543-550. |
| |
| 作者姓名： | 常鑫 邓刚 王旭 徐同江 尹晓明 |
| |
| 作者单位： | 应急总医院影像科, 北京 100028 |
| |
| 摘 要： | 目的:探讨通过64层螺旋CT螺距参数的设置，降低新型冠状病毒肺炎患者筛查的辐射剂量和扫描时间的可行性。方法:前瞻性选择需进行新型冠状病毒肺炎筛查患者，按扫描时间随机分为大螺距组和对照组，每组各16例。大螺距组选择1.375∶1螺距，对照组选择0.984∶1螺距。对肺纹理、支气管、纵膈结构的图像质量；胸主动脉、竖脊肌、双肺肺实质；辐射剂量的客观数据进行评价和分析。结果:32例图像均符合影像诊断要求。伪影、肺纹理评分差异有统计学意义（P<0.05）。两组右肺CT值分别是（-804.62±45.43） HU和（-852.12±28.13） HU、左肺CT值分别是（-808.13±37.74） HU和（-858.77±19.95） HU，均具有统计学意义（P<0.05）。两组的扫描时间分别为（2.14±0.15） s和（3.14±0.28） s，具有统计学意义（P<0.05）。两组记录所得的容积CT剂量指数（CTDIvol）是（7.88±0.89） HU和（11.17±1.08） HU、剂量长度乘积（DLP）是（279.14±36.33） HU和（387.25±47.86） HU均具有统计学意义（是P<0.05），有效剂量（ED）分别是（3.91±0.51） HU和（5.42±0.67） HU具有统计学意义（P<0.05）。结论:新型冠状病毒肺炎患者CT筛查检查中，使用大螺距扫描，能够减少辐射剂量、显著缩短了扫描时间，在不影响病灶诊断的前提下，降低病人接受到的辐射剂量和放射技师感染的风险，具有实际工作意义，有待进一步推广验证。
|
| 关 键 词： | 新型冠状病毒肺炎 计算机断层摄影 辐射剂量 |
| 收稿时间： | 2020-03-26 |
Application of Different Settings of 64-slice Spiral CT in Screening of Novel Coronavirusinfected Pneumonia |
| |
| Institution: | China Emergency General Hospital, Benjing 100028, China |
| |
| Abstract: | Objective:To investigate the feasibility of reducing the radiation dose and scanning time of patients with novel coronavirus pneumonia by setting the parameters of 64-slice spiral CT. Methods:Prospective selection of patients who needed to be screened for novel coronavirus pneumonia was randomly divided into a large pitch group and a control group according to the scan time, with 16 cases in each group. The large-pitch group chose 1.375:1, and the control group chose 0.984:1.The image quality of lung markings, bronchus, and mediastinal structure, objective data of thoracic aorta, erector spinae, bilateral lung parenchyma, and radiation dose were evaluated and analyzed. Results:32 cases of images meet the requirements of imaging diagnosis. The artifact and lung markings scores were significantly different(P<0.05). The CT values of the right lung were-804.62 ±45.43 and(-852.12 ±28.13) HU, and the CT values of the left lung were(-808.13 ±37.74) HU and(-858.77 ± 19.95) HU, demonstrates statistically significant(P<0.05). The scanning time of the two groups was(2.14 ±0.15) s and(3.14 ±0.28) s, respectively, which was statistically significant(P<0.05). The volume CT dose index(CTDIvol) recorded by the two groups was(7.88 ±0.89) HU and(11.17 ±1.08) HU, and the dose length product(DLP) was(279.14 ±36.33) HU and(387.25 ±47.86) HU. Both were statistically significant(P<0.05). The effective dose(ED) were(3.91 ±0.51) HU and(5.42 ±0.67) HU, respectively, with statistical significance(P<0.05). Conclusion:The use of large-pitch scanning in CT screening of patients with novel coronavirus pneumonia can reduce the radiation dose, significantly shorten the scan time, and reduce the radiation dose received by patients and the risk of infection by radiation technicians without affecting the diagnosis of lesions. It as practical significance, and needs to be further promoted and verified. |
| |
| Keywords: | |
|
| 点击此处可从《CT理论与应用研究》浏览原始摘要信息 |
| 点击此处可从《CT理论与应用研究》下载免费的PDF全文 |
|
