Feasibility of Low Dose Rigth Index in Reducing CT Radiation Dose in
Children with Craniosynostosis
CHEN Zilu1, BIAN Chuanzhen2, GAO Yang1
1. Department of Radiotherapy, Jiangsu Cancer Hospital & Jiangsu Institute of Cancer Research & The Affiliated Cancer Hospital of
Nanjing Medical University, Nanjing Jiangsu 21000, China;
2. Department of Radiotherapy, Children’s Hospital of Nanjing Medical University, Nanjing Jiangsu 21000, China
Abstract：Objective To explore the feasibility of dose right index (DRI) in reducing the radiation dose of CT examination in children
with craniosynostosis. Methods A total of 166 cases of children undergoing head CT examination in our hospital were randomly
divided into four groups (group A, B, C, D) by computer random number method, DoseRight technology was used, group A, B, C, D
of children were scanned by 27, 25, 23, 21 DRI respectively, using iDose4 reconstruction algorithm for image reconstruction. Then
the obtained images were evaluated subjectively and objectively, and the radiation dose was compared and analyzed. Results The
signal to noise ratio of frontal and temporal in the four groups decreased with the decrease of DRI (all P<0.001), the subjective score
of brain image quality decreased with the decrease of DRI (all P<0.001), but there was no statistically significant difference between
the subjective scores of skull image quality (P=0.06); there was no statistically significant difference in the diagnostic coincidence
rate among the four groups (P=0.73), volume CT dose index and dose length product in the four groups decreased with the decrease
of DRI (all P<0.001). Conclusion When performing CT scan of children with craniosynostosis, if it is necessary to observe the skull
and brain tissue at the same time, the scanning scheme with DRI set to 23 is feasible; if only the skull needs to be observed and there
is no requirement for the display of brain tissue, the scanning scheme with DRI set to 21 can be adopted.
陈子路1，边传振2，高杨1. 低剂量指数在降低颅缝早闭患儿CT检查辐射剂量的应用[J]. 中国医疗设备, 2022, 37(10): 88-91.
CHEN Zilu1, BIAN Chuanzhen2, GAO Yang1. Feasibility of Low Dose Rigth Index in Reducing CT Radiation Dose in
Children with Craniosynostosis. China Medical Devices, 2022, 37(10): 88-91.
