| 李浩,宁先英,成兰,雷子乔,郑传胜,余建明,吴红英.基于感染防控的新型冠状病毒肺炎低剂量CT扫描方案的临床应用研究[J].中华放射医学与防护杂志,2020,40(10):794-797 |
| 基于感染防控的新型冠状病毒肺炎低剂量CT扫描方案的临床应用研究 |
| Evaluation of low-dose CT protocol of novel coronavirus pneumonia based on infection prevention and control |
| 投稿时间：2020-03-12 |
| DOI：10.3760/cma.j.issn.0254-5098.2020.10.011 |
| 中文关键词: 新型冠状病毒 感染防控 低剂量计算机体层成像 图像质量 |
| 英文关键词:COVID-19 Infection prevention and control Low dose CT computed tomography Image quality |
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| 中文摘要: |
| 目的 探讨感染防控下新型冠状病毒（COVID-19）肺炎低剂量CT扫描方案的临床应用。方法 分析2020年1月20日到2020年2月28日在华中科技大学同济医学院附属协和医院确诊的COVID-19病例的CT影像140例，将患者分为低剂量组和常规剂量组。低剂量组（120 kV，31 mAs）70例，其中轻症51例，重症15例，危重症4例；常规剂量组（120 kV，自适应毫安秒）70例，其中轻症48例，重症17例，危重症5例。比较两组病例有效剂量（E）、图像信噪比（SNR）、对噪比（CNR），由两位高、中年资影像诊断医生对图像进行主观评分。结果 低剂量组和常规剂量组E比较，差异有统计学意义（t=-48.343，P<0.05）。低剂量组的SNR和常规剂量组的SNR比较，差异无统计学意义（P>0.05）。低剂量组的CNR和常规剂量组的CNR比较，差异无统计学意义（P>0.05）。主观评价均满足诊断需求，轻症患者中，低剂量组和常规剂量组的影像主观评分比较，差异无统计学意义（P>0.05）；重症与危重患者中，低剂量组和常规剂量组的影像主观评分比较，差异有统计学意义（t=-2.781，P<0.05）；但两组图像均符合诊断要求。结论 对COVID-19患者进行低剂量CT扫描，可在满足诊断需求的前提下降低患者辐射剂量。 |
| 英文摘要: |
| Objective To explore a low dose CT scanning method on novel coronavirus (COVID-19) pneumonia based on infection prevention and control. Methods A total of 140 patients with confirmed novel coronavirus pneumonia in Xiehe hospital from January 20, 2020 to February 28, 2020 were undertaken CT scan and divided into low dose group and conventional dose group. The patients in low dose group(120 kV, 31 mAs) consisted of mild type(51), severe type(15) and critically ill type(4); and those in conventional dose group(120 kv, adaptive milliampere second) consisted of mild type(48), severe type(17) and critically ill type(5). The effective radiation dose, SNR and CNR of CT scan were compared between two groups. A senior and a middle radiologist made the image subjective quality scores, respectively. Results The effective dose in low dose group was lower than that of conventional dose group(t=-48.343,P<0.05). There was no significant difference in SNR and CNR between two groups(P>0.05 ). For severe and critically ill patients, the score in low dose group was significantly lower than that in conventional dose group(t=-2.781,P<0.05 ). There was no significant difference in scores between two groups for mild patients(P>0.05 ). Conclusions Low-dose CT scanning could meet the image quality needs for patients with COVID-19 and meanwhile significantly reduce the radiation dose. |
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