Development and evaluation of a novel integrated radiation protection device for CT
10.3760/cma.j.cn112149-20191101-00878
- VernacularTitle:新型一体化医用CT机辐射防护装置的研制及其评价
- Author:
Wu ZHANG
1
;
Wanjun HAO
;
Jing CHEN
;
Zilong CHEN
;
Guang YANG
;
Yuqin WU
;
Hong CHEN
Author Information
1. 中南大学湘雅医学院附属海口医院放射科，海口 570208
- From:
Chinese Journal of Radiology
2020;54(10):1003-1007
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To explore the radiation protection effect of a novel integrated radiation protection device for computed tomography and evaluate its influence on image quality.Methods:According to the radiation protection principle and CT model, a novel integrated CT radiation protection device was designed and developed. Under the normal operation condition of CT scanner, the radiation dose rate of 7 monitoring points around CT scanner before and after the use of radiation protection device was measured and the effective protection rate was calculated. Before and after using the protective device, the water equivalent phantom was scanned with CT respectively, CT value and signal-to-noise ratio were measured and calculated, and the image quality was evaluated subjectively with the 3-point system. The paired t-test was used to compare the difference of radiation dose rate, average CT value and signal-to-noise ratio of CT surrounding environment before and after using the protective device, and the Mann Whitney U-test was used to compare the difference of subjective scores of CT image quality of water model before and after using the protective device. Results:The radiation dose rates of the 7 monitoring points after the use of the novel CT radiation protection device was significantly lower than those before radiation protection device was used, the difference was statistically significant (P<0.05), and the effective protection rate was more than 50%; the average CT value, signal-to-noise ratio and subjective score in the range of water equivalent phantom before and after the use of the radiation protection device were not statistically significant ( P>0.05). Conclusions:The novel integrated CT radiation protection device can significantly reduce the radiation dose rate of the surrounding environment when the CT machine is running and has no effect on the image quality.
