Abstract:Objective To investigate the effect of scanning field of view (SFOV) on water equivalent diameter of size-specific dose
estimates (SSDEWED) in adult chest CT. Methods A total of 162 adult patients who underwent chest CT scan in our hospital from
July to August in 2020 were retrospectively analyzed. The middle level images of the original sequence were selected, and the
circular region of interest (ROI) was drawn. The CT value and area of ROI were measured. The gender, age, volume CT dose index
(CTDIvol), dose length product (DLP) and SFOV were recorded. The water equivalent diameter (WED), fsize·WED and SSDEWED in the
middle layer of each patient were calculated. Multiple regression analysis was used to analyze the correlation between gender, age,
CTROI, AROI, CTDIvol, DLP, SFOV and SSDEWED. Results Gender, age, AROI, CTDIvol, DLP and SFOV were significantly different
from SSDEWED (P<0.05),but CTROI were no significantly different from SSDEWED (P<0.05). Conclusion SFOV has a significant
influence on the SSDEWED of chest CT scan, with a positive linear correlation of 0.06 times. Precisely adjusting SFOV can reduce the
chest CT radiation dose of adult patients in clinical scan.
胡勤勤,张琴,刘曦,张德川,杨荟平,孔丽娜,张昊,李修建. SFOV对成人胸部CT水当量直径的体型特异性剂量估算的影响研究[J]. 中国医疗设备, 2021, 36(10): 140-143.
HU Qinqin, ZHANG Qin, LIU Xi, ZHANG Dechuan, YANG Huiping, KONG Lina, ZHANG Hao, LI Xiujian. Effect of SFOV on Water Equivalent Diameter of Size-Specific Dose Estimation in Adult Chest CT. China Medical Devices, 2021, 36(10): 140-143.