Application of modified contrast agent injection protocol in CT pulmonary angiography
10.3969/j.issn.1002-1671.2025.06.032
- VernacularTitle:改良对比剂注射方式在CT肺动脉造影中的应用研究
- Author:
Yue MENG
1
;
Yan GU
;
Chongchang MIAO
;
Ying ZHOU
;
Yonggang ZHANG
;
Jie ZHU
Author Information
1. 连云港市第一人民医院影像科,江苏 连云港 222002
- Publication Type:Journal Article
- Keywords:
computed tomography pulmonary angiography;
modified contrast agent injection;
computed tomography
- From:
Journal of Practical Radiology
2025;41(6):1042-1046
- CountryChina
- Language:Chinese
-
Abstract:
Objective To analyze the clinical application value of modified contrast agent injection protocol in computed tomography pulmonary angiography(CTPA)examinations.Methods A total of 124 patients with high clinical suspicion of pulmonary embolism(PE)who underwent CTPA were selected,and 104 patients were finally included in the study.These patients were randomly divided into traditional group and modified group based on different contrast agent injection protocols,with 52 patients in each group.The CT values,image noise,signal-to-noise ratio(SNR),contrast-to-noise ratio(CNR),visualized segment number,image score,contrast agent dosage,and radiation dose of pulmonary artery and its branches were compared between the two groups.Results There were no significant differences in age,body mass index(BMI),Qanadli embolism index,volume CT dose index(CTDIvol),dose length product(DLP),effective dose(ED),CT values of pulmonary artery and its branches,image noise,SNR and CNR between the two groups(P＞0.05).However,there were statistically significant differences in the subjective image score and contrast agent dosage between the two groups(P＜0.05).The subjective image score in the modified group was significantly higher than that in the traditional group,and the contrast agent dosage in the modified group was approximately half of that in the traditional group.Conclusion The modified contrast agent injection protocol in CTPA examinations can not only ensure the image quality of pulmonary artery and its branches meeting the diagnostic standards,but also significantly reduce the contrast agent dosage,which indicates a high clinical application value.
