16-slice mobile CT low-dose scanning imaging of children's head and risks control of radiation injury

doi:10.3877/cma.j.issn.2095-9141.2022.05.005

Abstract

Abstract:

Objective

To analyze the imaging quality and radiation injury risk control of 16-slice mobile CT low-dose scanning in the head of children aged 14 years and below with craniocerebral diseases.

Methods

A total of 180 children aged 14 and below with craniocerebral diseases were admitted in the Radiodiagnosis Department of the 7^th Medical Center of the PLA Hospital and the Brain Center of Langfang Edburg Hospital from March 2017 to January 2020, including 20 children aged 0-3 years and 160 children aged 4-14 years. The low-dose imaging quality of 16-slice mobile CT was observed. At the same time, the volume CT dose index (CTDIvol), dose length product (DLP) and human effective dose (ED) of the 0-3 years old group (10 cases), the 4-14 years old group (20 cases), and the adult group (20 cases) were collected. Twenty adult patients with 8-slice mobile CT and 64-slice large CT scans were selected in the same period from the Radiodiagnosis Department of the 7^th Medical Center of the PLA Hospital for comparison and analysis of the changes of three different types of radiation dose indicators.

Results

The imaging quality of low-dose head scan in children aged 14 years and below is stable and meets the requirements of clinical diagnosis. The comparison of radiation dose indicators shows that the CTDIvol and DLP values of the adult group were significantly different from those of the 0-3 year old group and the 4-14 year old group, while the ED values of the 3 groups were not statistically significant (P>0.05). The CTDIvol, DLP and ED values in the 16-slice mobile CT adult group were significantly different from those in the 8-slice mobile CT group and 64-slice large CT group (P<0.05).

Conclusion

The low-dose scan of 16-slice mobile CT in children aged 14 years and below had no significant effect on the image quality, but the radiation dose index decreased significantly, which effectively controlled the risk of radiation injury.

Key words: Children with craniocerebral diseases, Mobile CT, Head scanning, Radiation dose

Zhiqiang Zhang, Fei Li, Quanle Zheng, Zhenfang Wang, Wenjin Chen, Kai Sun, Guohua Wu, Chunhu Li, Chao Xu, Qiusheng Dai, Lihua Chen, Ruxiang Xu. 16-slice mobile CT low-dose scanning imaging of children's head and risks control of radiation injury[J]. Chinese Journal of Neurotraumatic Surgery(Electronic Edition), 2022, 08(05): 282-286.

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References 17

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受检时间	例数	0~3岁		4~14岁
受检时间	例数	男性	女性	男性	女性
2017.03.01~2018.02.28	20	1	0	13	6
2018.03.01~2019.02.28	157	10	8	95	44
2019.03.01~2020.01.31	3	1	0	2	0
合计	180	12	8	110	50

受检时间	例数	0~3岁		4~14岁
受检时间	例数	男性	女性	男性	女性
2017.03.01~2018.02.28	20	1	0	13	6
2018.03.01~2019.02.28	157	10	8	95	44
2019.03.01~2020.01.31	3	1	0	2	0
合计	180	12	8	110	50

组别	例数	CTDIvol（mGy）	DLP（mGy.cm）	ED（mSv）
0~3岁组	10	19.51±2.89	156.08±26.15	0.62±0.10
4~14岁组	20	28.58±8.26^a	210.46±48.63^a	0.67±0.16
成年人组	20	43.44±12.74^ab	349.31±103.21^ab	0.73±0.22
F值		36.660	43.480	2.167
P值		<0.001	<0.001	0.124

组别	例数	CTDIvol（mGy）	DLP（mGy.cm）	ED（mSv）
0~3岁组	10	19.51±2.89	156.08±26.15	0.62±0.10
4~14岁组	20	28.58±8.26^a	210.46±48.63^a	0.67±0.16
成年人组	20	43.44±12.74^ab	349.31±103.21^ab	0.73±0.22
F值		36.660	43.480	2.167
P值		<0.001	<0.001	0.124

组别	例数	CTDIvol（mGy）	DLP（mGy.cm）	ED（mSv）
16排移动CT	20	43.44±12.74	349.31±103.21	0.73±0.22
8排移动CT	20	79.73±6.83^a	1291.08±180.14^a	2.71±0.38^a
64排移动CT	20	56.73±7.56^ab	896.47±128.46^ab	1.90±0.28^ab
F值		76.010	225.200	219.200
P值		<0.001	<0.001	<0.001

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