| 唐智明,何卫红,钱其林,吴小红.精准数学模型在肺动脉CT成像中的应用.[J].中南医学科学杂志.,2021,(4):414-417. |
| 精准数学模型在肺动脉CT成像中的应用 |
| Application of precise mathematical model in pulmonary artery CT imaging |
| 投稿时间：2020-09-22 修订日期：2021-04-15 |
| DOI：10.15972/j.cnki.43-1509/r.2021.04.010 |
| 中文关键词: 肺动脉 数学模型 体层摄影术 X线计算机 小剂量测试 |
| 英文关键词:pulmonary artery mathematical model tomography X-ray computed test blous |
| 基金项目:湖南省科技厅临床医疗技术创新引导项目(2017SK50212) |
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| 中文摘要: |
| 目的探讨数学模型在肺动脉CT成像中的可行性及合理性。方法将180例临床需行肺动脉CT检查的患者随机分为3组。数学模型组以肺动脉与肺静脉交叉点时间为扫描延迟时间,采用数学模型计算对比剂及生理盐水用量；固定用量组以肺动脉与肺静脉交叉点时间为扫描延迟时间,固定注射35 mL对比剂及50 mL生理盐水；对照组以肺动脉达峰时间+2 s为扫描延迟时间,固定注射35 mL对比剂及50 mL生理盐水。测量肺动脉干、尖段肺动脉、后底段肺动脉、上腔静脉CT值,主观评价图像质量和上腔静脉硬化伪影,并进行统计分析。结果数学模型组生理盐水及对比剂用量均明显低于固定用量组和对照组(P＜0.05)；3组所测肺动脉CT值差异无显著性(P＞0.05)；上腔静脉CT值数学模型组低于固定用量组及对照组(P＜0.05)；图像质量评分数学模型组及固定用量组高于对照组(P＜0.05)；上腔静脉硬化伪影数学模型组少于固定用量组和对照组(P＜0.05)。结论该数学模型在肺动脉CT成像中的应用可行且减少了对比剂及生理盐水用量,提高了图像质量,值得临床推广。 |
| 英文摘要: |
| To explore the feasibility and rationality of mathematical model in pulmonary artery CT imaging. MethodsA total of 180 patients with clinically need for pulmonary artery CT were randomly divided into three groups:the mathematical model group, the time at the intersection of pulmonary artery and pulmonary vein was taken as the scanning delay time, and the dosage of contrast agent and normal saline was calculated by mathematical model; The fixed dosage group, the time at the intersection of pulmonary artery and pulmonary vein was used as the scanning delay time,35 mL contrast agent and 50 mL normal saline were fixed; The comparative group, pulmonary artery peak time add 2 s was used as the scanning delay time, and 35 mL contrast agent and 50 mL normal saline were fixed. CT values of main pulmonary artery (MPA), apical pulmonary artery, posterior bottom pulmonary artery and superior vena cava (SVC) were measured. Image quality and SVC sclerosis artifacts were evaluated subjectively and analyzed statistically. ResultsThe dosage of normal saline and contrast agent in the mathematical model group was significantly lower than that in the fixed dosage group and comparative group (P＜0.05). There was no significant difference in CT value of pulmonary artery between the three groups (P＞0.05). CT value of SVC in the mathematical model group was lower than that in the fixed dosage group and comparative group, and the difference was statistically significant (P＜0.05). Image quality scores of the mathematical model group and fixed dosage group were higher than the comparative group. The sclerosis artifacts of SVC, the mathematical model group were less than those of the fixed dosage group and comparative group. ConclusionThe application of the mathematical model is feasible and the amount of contrast agent and normal saline is reduced, and the image quality is improved, which is worth popularizing. |
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