| 胸部增强CT扫描触发阈值在肺癌鉴别诊断中的应用 |
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| 引用本文： | 来守永,王迪,杨超,杨梓.胸部增强CT扫描触发阈值在肺癌鉴别诊断中的应用[J].CT理论与应用研究,2020,29(3):337-346. |
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| 作者姓名： | 来守永 王迪 杨超 杨梓 |
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| 作者单位： | 1. 首都医科大学附属北京胸科医放射科, 北京市结核病胸部肿瘤研究所, 北京 101149; |
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| 摘 要： | 目的:探讨在胸部CT增强扫描中不同扫描触发阈值对图像影像的影响。方法:选取我院行胸部CT增强扫描患者分成3组，扫描触发阈值设置A组阈值120HU，患者21例；B组阈值160HU，患者26例；C组阈值200HU患者21例。所有入组患者第一期动脉期使用Smart触发技术，第二期静脉期延迟45s扫描。测量肺动脉干层面降主动脉的动脉期和静脉期CT值，对3组图像进行客观分析。结果:3组患者体重:A组（66.38±9.08）kg、B组（67.46±8.56）kg、C组（66.38±6.62）kg，3组患者体重P=0.875，P>0.05无统计学意义。动脉期CT值A组（296.86±36.76）HU、B组（321.62±40.18）HU、C组（318.11±42.21）HU，P=0.009，P<0.05有统计学意义；静脉期CT值A组（158.67±15.96）HU、B组（168.35±14.69）HU、C组（171.62±12.851）HU，P=0.014，P<0.05有统计学意义。A组、B组和C组三组客观图像质量评分C组4.90大于B组4.69大于A组4.47。结论:3组实验统计分析均满足临床诊断要求，C组血管动脉期及静脉期充盈效果更佳，有利于放射诊断医生和临床医生肺部疾病的鉴别诊断。
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| 关 键 词： | 碘对比剂 智能追踪阈值 CT值 降主动脉 |
| 收稿时间： | 2019-12-11 |
Application of Trigger Threshold on Chest Enhanced CT Scan in Differential Diagnosis of Lung Cancer |
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| Institution: | 1. Radiology Department, Beijing Chest Hospital Affiliated To Capital Medical University, Beijing Tuberculosis and Thoracic Tumor Research Institute, Beijing 101149, China;2. Nuclear Medicine Department, Shanghai Pulmonary Hospital Affiliated Shanghai Tongji University, Shanghai 200238, China |
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| Abstract: | Objective to investigate the effect of different trigger threshold on image enhancement in chest CT. Methods the chest CT enhancement scan patients in our hospital were divided into 3 groups, and the threshold of scan trigger was set to 120HU in group A, 21 patients. 160HU was set as the threshold in group B, with 26 patients. The threshold of group C was set in 21 patients with 200HU. Smart trigger technique was used in the first arterial phase and the second venous phase was delayed by 45s in all enrolled patients. CT values of descending aorta at pulmonary artery level and venous stage were measured. Results the weight of patients in the 3 groups was (66.38±9.08)kg in group A, (67.46±8.56) kg in group B, and (66.38±6.66) kg in group C. Arterial CT value of group A (296.86±36.76)HU, group B (321.62±40.18)HU, and group C (318.11±42.21)HU, P=0.009, P<0.05 were statistically significant; venous CT value of group A (158.67±15.96)HU, group B (168.35±14.69)HU, and group C (171.62±12.851)HU, P=0.014, P<0.05 were statistically significant. Objective image quality score of group A, group B and group C was 4.90 greater than that of group B, 4.69 greater than that of group A, 4.47. Conclusion the statistical analysis of the three groups all met the clinical diagnostic requirements, and the filling effect of the arterial and venous phases was better in group C, which was conducive to the differential diagnosis of pulmonary diseases between radiologists and clinicians. |
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