Impact of “double low” scanning technology combined with individualized injection protocol on the image quality and safety of abdominal contrast-enhanced CT
10.13491/j.issn.1004-714X.2025.01.020
- VernacularTitle:“双低”扫描技术联合个体化注射方案对腹部增强CT图像质量及安全性的影响
- Author:
Jinben WANG
1
;
Liwei DONG
2
;
Zhuangjun CHEN
1
;
Wenrong HUANG
1
;
Lu WANG
1
Author Information
1. Radiological department Hainan, Western Central Hospital, Danzhou 571700 China.
2. Radiological department, Hainan General Hospital, Haikou 570311 China.
- Publication Type:OriginalArticles
- Keywords:
"Double low" scanning technology;
Individualized injection protocol;
Abdomen;
Contrast-enhanced CT
- From:
Chinese Journal of Radiological Health
2025;34(1):119-125
- CountryChina
- Language:Chinese
-
Abstract:
Objective To assess the effects of “dual low” scanning technology in conjunction with an individualized injection protocol in enhancing the quality of abdominal contrast-enhanced CT images. Methods A total of 200 patients who underwent abdominal contrast-enhanced CT examinations at the Hainan Western Central Hospital between January 2022 and January 2024 were selected for the study. Using a random number table, participants were randomly assigned to either a control group (n = 100, sub-hypertonic contrast agent + conventional tube voltage + individualized injection protocol) or an observation group (n = 100, isotonic contrast agent + tube voltage of 100 kV + individualized injection protocol). The study compared the impact of these two methodologies on the quality of abdominal contrast-enhanced CT images. Results During the arterial phase, the CT value of the abdominal aorta was significantly higher in the observation group than that in the control group (P < 0.05), suggesting that isotonic contrast agent and low tube voltage more effectively enhanced vascular signal. During the portal vein phase, the CT value was higher and the liver parenchymal noise was lower in the observation group those in the control group (P < 0.05), further validating the advantages of the “dual low” approach during the portal venous phase. The radiation dose was significantly lower in the observation group than that in the control group (P < 0.05), indicating that the “dual low” protocol effectively reduced radiation dose while enhancing patient safety. During the arterial phase, both the abdominal aorta noise and liver parenchymal noise were lower in the observation group than those in the control group (P < 0.05), demonstrating that the “dual low” strategy effectively reduced image noise and enhanced image clarity. The image quality scores were significantly higher in the observation group than in the control group (P < 0.05), indicating that high image quality could be achieved even at reduced radiation doses and contrast agent concentrations. Conclusion The “dual low” scanning technology, combined with an individualized injection protocol, not only effectively enhances the contrast of arteries and veins, reduces image noise, and improves the overall image quality, but also decreases radiation dose and enhances patient safety. Therefore, this technology is worth being widely promoted.
