个体化降低CT扫描管电流在腰椎间盘检查的应用

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Abstract Objective: To explore the possibilities and methods of reducing the tube current personalized based on the waist in CT axial scanning of lumbar intervertebral disc. Methods: The CT model of 60～110 cm waistline was made of porcine lumbar spine. The lumbar intervertebral disc was scanned with 10～130 mA and other scanning parameters were unchanged. The tube current value was obtained when the image quality was standard. 350 cases undergoing CT scanning of lumbar intervertebral disc in our hospital from March to July in 2015 were enrolled. All patients were randomly divided into two groups: conventional-dose group and low-dose group. The conventional-dose group consisted of 50 patients and the low-dose group consisted of 300 cases. There was no statistically significant difference between the two groups in age, height and weight. The lumbar intervertebral disc was scanned with 130 mA in conventional-dose group, and that in low-dose group was scanned with the tube current value increased by 10 mA, which was obtained with image of quality standards in waist lumbar model of different waistline. The dose of CT scan radiation was compared between two groups. The relationship between waistline and the tube current was analysed using linear regression. Results: The CTDIvol was lower 73.39%, and the DLP 73.40% in low-dose group comparing the conventional-dose group, the difference was statistically significant. The regression equation y=0.498x+47.86, R2=0.881 was derived with the tube current as argument and waistline as the dependent variable. Conclusion: The operation of adjustment of the tube current according to the waistline of patients before CT scan is simple, the individuation and maneuverability of CT radiation dose control is fully embodies. There is clinically practical significance.

Key words： Intervertebral disk Lumbar vertebrae Tomography, spiral computed

PACS:	Ｒ681.53
	Ｒ814.42

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	Articles by authors
	BAI Jin-cheng
	CHI Hong-wei
	WANG Shu-ping
	MEN Ming
	YU Dong-mei
	WANG Chong
	REN Jin-jun
	CHEN Yan-fang

Cite this article:

BAI Jin-cheng,CHI Hong-wei,WANG Shu-ping, et al. Application in reduction of the tube current personalized in CT scanning based on#br# the waistline in lumbar intervertebral disc[J]. JOURNAL OF CHINA MEDICAL IMAGING, 2016, 27(6): 427-430.

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http://www.jccmi.com.cn/EN/ OR http://www.jccmi.com.cn/EN/Y2016/V27/I6/427

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