Application of organ dose modulation technique in CTA for both lower extremities
10.3969/j.issn.1672-8270.2025.03.001
- VernacularTitle:器官剂量调制技术在双下肢CT血管造影中的应用
- Author:
Ran LI
1
;
Ying YUAN
1
;
Hui XU
1
;
Yuan YUAN
1
;
Guilian JIANG
1
Author Information
1. 首都医科大学附属北京友谊医院放射科 北京 100050
- Publication Type:Journal Article
- Keywords:
Computed tomography angiography(CTA)for both lower extremities;
Organ dose modulation(ODM);
Sensitive organ for radiation
- From:
China Medical Equipment
2025;22(3):1-4
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To investigate the effect of organ dose modulation(ODM)technique on radiation dose and image quality in computed tomography angiography(CTA)for arteries of both lower extremities.Methods:A total of sixty patients with suspected lower extremity arterial occlusion who underwent CTA examination on both lower extremities at Beijing Friendship Hospital affiliated to Capital Medical University from March 2024 to June 2024 were selected.They were randomly divided into an ODM group and a non-ODM group,with 30 patients in each group.All patients underwent CTA examination with the same scanning parameters.The tube currents in the pelvic region,which included 4 directions(anterior,left,posterior and right),of two groups of patients were recorded,and the CT values,SD values,volumetric CT dose index(CTDIvol)and dose-length product(DLP)of femoral artery and external iliac artery of the regions of interest(ROI)in the pelvic region were respectively measured,and the image quality of them was analyzed by subjective scores.Results:The tube current in front of the pelvic cavity was(109.17±35.62)mA in ODM group,which decreased by 42%than(185.58±55.38)mA in non-ODM group,and the difference was statistically significant(t=-4.781,P<0.05).There were no statistically significant differences in CTDIvol values,DLP values,and CT values and signal noise ratio(SNR)of femoral artery and external iliac artery of the regions of interest(ROI)in the pelvic region between two groups(P>0.05).The subjective scores for image quality of two groups were≥4 points,and there was not statistically significant difference in that between two groups(P>0.05).Conclusion:The application of ODM technique in CTA examination for both lower extremities can realize protective function for surface gonadal organs when ensures image quality,which can meet the needs of clinical diagnosis.It has clinical application value.
