ISSN 1004-4140
CN 11-3017/P
王永胜, 杨磊清, 杨怡帆, 等. 不同触发阈值对肺动脉CTA图像质量影响的研究[J]. CT理论与应用研究(中英文), 2024, 33(2): 175-181. DOI: 10.15953/j.ctta.2023.121.
引用本文: 王永胜, 杨磊清, 杨怡帆, 等. 不同触发阈值对肺动脉CTA图像质量影响的研究[J]. CT理论与应用研究(中英文), 2024, 33(2): 175-181. DOI: 10.15953/j.ctta.2023.121.
WANG Y S, YANG L Q, YANG Y F, et al. The Effect of Different Trigger Thresholds on the Quality of Pulmonary Artery CT Angiography Images[J]. CT Theory and Applications, 2024, 33(2): 175-181. DOI: 10.15953/j.ctta.2023.121. (in Chinese).
Citation: WANG Y S, YANG L Q, YANG Y F, et al. The Effect of Different Trigger Thresholds on the Quality of Pulmonary Artery CT Angiography Images[J]. CT Theory and Applications, 2024, 33(2): 175-181. DOI: 10.15953/j.ctta.2023.121. (in Chinese).

不同触发阈值对肺动脉CTA图像质量影响的研究

The Effect of Different Trigger Thresholds on the Quality of Pulmonary Artery CT Angiography Images

  • 摘要: 目的:研究不同触发阈值对肺动脉CTA图像质量的影响。资料与方法:前瞻性纳入上海市金山区亭林医院2021年12月至2023年4月临床怀疑肺动脉栓塞的患者112例作为研究对象,其中男性49例,女性63例,年龄在37~93岁,平均年龄为64.28岁。根据触发阈值不同分成3组,将患者分配到A、B、C 3组,A组触发阈值为120 HU共38例、B组触发阈值为200 HU共37例、C组触发阈值为250 HU共37例,3组间性别、年龄、身高、体重差异无统计学意义。采用单因素ANOVA检验,比较3组间的上腔静脉、肺动脉主干及左右肺动脉、右肺静脉的CT值以及图像质量主观评分。结果:3组间肺动脉主干及左右肺动脉CT值无统计学差异,上腔静脉、右肺静脉CT值有统计学差异;3组间的图像质量主观评分有统计学差异;两名医师间对所得图像质量主观评价的一致性结果为高度一致,Kappa=0.78。结论:肺动脉CTA触发阈值在200 HU,2 s后启动扫描时,既能保证肺动脉主干CT值的浓度,满足临床诊断,又保证对比剂充分的灌注到5~6级分支,上腔静脉潴留少,肺静脉显影淡,肺动脉CTA的图像质量最佳。

     

    Abstract: Objective: To study the effect of different triggering thresholds on the quality of pulmonary artery CT angiography (CTA) images. Materials and Methods: A prospective study included 112 patients with suspected pulmonary embolism admitted to Tinglin Hospital in the Jinshan District of Shanghai between December 2021 to April 2023. Among them, there were 49 males and 63 females aged between 37 and 93 years, with an average age of 64.28 years. Patients were randomly assigned to three groups based on trigger thresholds. Group A included 38 cases with a trigger threshold of 120 HU, Group B included 37 cases with a trigger threshold of 200 HU, and Group C included 37 cases with a trigger threshold of 250 HU. There were no statistically significant differences in gender, age, height, or weight among the three groups. One-way ANOVA was used to compare the CT values and subjective image quality scores of the superior vena cava, main pulmonary artery, left and right pulmonary arteries, and right pulmonary vein among the three groups. Result: There were no statistical differences in the CT values of the main pulmonary artery and left and right pulmonary arteries among the three groups, but there were statistical differences in the CT values of the superior vena cava and right pulmonary vein. There was a statistical difference in the subjective score of image quality among the three groups; the subjective evaluation of the obtained image quality between the two physicians was highly consistent (κ=0.78). Conclusion: When the triggering threshold of pulmonary artery CTA is 200 HU, it can not only ensure the concentration of pulmonary artery trunk CT value meets the clinical diagnosis, but also ensures that the contrast agent is fully injected into the 5~6 grade branches, leading to less retention of superior vena cava, weak pulmonary vein development, and the highest image quality of pulmonary artery CTA.

     

/

返回文章
返回