Feasibility of ultra-large pitch Turbo Flash scan mode in chest scan in preschool children without sedatives
10.13929/j.1003-3289.201610125
- VernacularTitle:超大螺距Turbo Flash扫描模式在学龄前儿童胸部检查中不用镇静剂的可行性
- Author:
Xianchun ZENG
;
Jing CHEN
;
Yuquan WANG
;
Changjie LIU
;
Tao WANG
;
Rongpin WANG
- Keywords:
Large pitch;
Preschool children;
Sedatives;
Chest scan;
Radiation doage
- From:
Chinese Journal of Medical Imaging Technology
2017;33(8):1221-1225
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the feasibility of chest examination using ultra-large pitch Turbo Flash in Force CT in preschool children without sedative.Methods A total of 90 preschool children evaluated as nervous or frightened were equally divided into 3 groups according to the scanning time.For group A,the routine scan with the mode of CARE Dose 4D/CARE kV was performed,and the sedative was used.For group B,the scan with ultra-large pitch Turbo Flash model and pitch as 3.0 was performed,and the sedative was used.For group C,the same scan mode as group B was performed but without sedative.The scanning time,radiation dose,image quality and the diagnostic efficiency were compared among 3 groups.Results There were no significant differences of the CT values of the aorta root,spinal posterior muscles and subcutaneous fat,the noise of the aorta root,SNR and CNR among 3 groups (all P＞0.05).Moreover,no significant differences of the subjective score of image quality in pulmonary window and mediastinum window images were found among 3 groups (both P＞0.05).The scanning time and radiation dose indexes (CT dose index volume [CTDIvo1],doselength product [DLP],effective dose [ED]) of group A were significantly higher than those of group B and group C (all P ＜0.05),while there were no significant differences between group B and group C (all P＞0.05).There were no significant differences between the CT diagnosis and clinical diagnosis results in all 3 groups (all P＞0.05).Conclusion It can shorten the scanning time and decrease the radiation dose by using the mode of ultra-large pitch Turbo Flash.And the satisfactory image quality can be obtained without sedative for nervous or frightened preschool children.
