低剂量锥形束CT扫描可行性的实验研究

doi:10.7518/hxkq.2020.04.011

华西口腔医学杂志 ›› 2020, Vol. 38 ›› Issue (4): 415-418.doi: 10.7518/hxkq.2020.04.011

低剂量锥形束CT扫描可行性的实验研究

施雄(), 李生娇(), 周剑萍, 张利

同济大学口腔医学院和附属口腔医院放射科,上海牙组织修复与再生工程技术研究中心,上海 200072

收稿日期:2019-09-21 修回日期:2020-05-16 出版日期:2020-08-01 发布日期:2020-08-03
通讯作者: 李生娇 E-mail:lshjlchm@163.com
作者简介:施雄,主治医生,硕士,E-mail： shixionger@aliyun.com

Experimental study on the feasibility of low-dose cone beam computed tomography scanning

Shi Xiong(), Li Shengjiao(), Zhou Jianping, Zhang Li

Dept. of Radiology, School and Hospital of Stomatology, Tongji University, Shanghai Engineering Research Center of Tooth Restoration and Regeneration, Shanghai 200072, China

Received:2019-09-21 Revised:2020-05-16 Online:2020-08-01 Published:2020-08-03
Contact: Li Shengjiao E-mail:lshjlchm@163.com

摘要/Abstract

摘要：

目的研究不同管电流、管电压对新鲜巴马猪猪头切牙区锥形束CT（CBCT）扫描时图像质量和辐射剂量的影响,为实现低剂量CBCT扫描提供理论依据。方法将新鲜巴马猪猪头固定在CBCT扫描视野的中央,使用不同的管电流、管电压围绕切牙区进行360°扫描,记录辐射剂量,评价图像质量。结果随着管电流或管电压的降低,辐射剂量逐渐下降,图像质量也逐渐下降。扫描参数90 kV、2.5 mA组合与60 kV、7.0 mA组合的平均容积CT剂量指数（CTDIvol）均为1.7 mGy,前者的图像质量评分高于后者,二者间差异具有统计学意义（P<0.05）。结论在保证图像质量的前提下,降低管电流更能实现低剂量CBCT扫描。

关键词: 锥形束CT, 低剂量, 辐射剂量

Abstract:

Objective The effects of different tube currents and voltages on image quality and radiation dose were studied to provide a theoretical basis for low-dose cone beam computed tomography (CBCT) scanning in children. Methods Different tube currents and voltages were used to scan the incisor area of fresh Bama pig heads by CBCT. The radiation dose was recorded, and image quality was evaluated. Results As the tube current or voltage decreased, the radiation dose and image quality gradually decreased. The computed tomographic dose index (CTDIvol) of 90 kV, 2.5 mA and 60 kV, 7.0 mA were all 1.7 mGy. The image quality score of the former was higher than that of the latter, and the difference between them was statistically significant (P<0.05). Conclusion Low-dose CBCT scanning appears to be able to reduce the necessary tube current during imaging by improving image quality.

Key words: cone beam computed tomography, low-dose, radiation dosage

中图分类号:

R814.42

施雄, 李生娇, 周剑萍, 张利. 低剂量锥形束CT扫描可行性的实验研究[J]. 华西口腔医学杂志, 2020, 38(4): 415-418.

Shi Xiong, Li Shengjiao, Zhou Jianping, Zhang Li. Experimental study on the feasibility of low-dose cone beam computed tomography scanning[J]. West China Journal of Stomatology, 2020, 38(4): 415-418.

图/表 5

参考文献 13

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低剂量锥形束CT扫描可行性的实验研究

Experimental study on the feasibility of low-dose cone beam computed tomography scanning

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