利用蒙特卡罗建模及估算儿童X-CT检查受照剂量

辐射防护 ›› 2016, Vol. 36 ›› Issue (3): 129-134.

利用蒙特卡罗建模及估算儿童X-CT检查受照剂量

潘羽晞^1,2, 邱睿^1,2, 郑钧正^1,3, 高林峰³, 李君利^1,2

1.清华大学工程物理系,北京 100084;
2.清华大学粒子技术与辐射成像教育部重点实验室,北京 100084;
3.上海市疾病预防控制中心,上海 200336

收稿日期:2015-03-22 出版日期:2016-05-20 发布日期:2021-11-12
作者简介:潘羽晞(1989—),女, 2011年毕业于南华大学核科学技术学院,现为清华大学工程物理系在读博士研究生。E-mail:freeskypan@foxmail.com
基金资助:
国家自然科学基金资助项目(批准号11175122);上海市放射卫生重点学科建设项目(08 GWZX 0602)。

Modeling and dose estimation of pediatric X-CT examination using Monte Carlo technique

Pan Yuxi^1,2, Qiu Rui^1,2, Zheng Junzheng^1,3, Gao Linfeng³, Li Junli^1,2

1. Department of Engineering Physics,Tsinghua University,Beijing 100084;
2. Key Laboratory of Particle & Radiation Imaging,Ministry of Education,Tsinghua University,Beijing 100084;
3. Shanghai Municipal Center for Disease Control and Prevention,Shanghai 200336

Received:2015-03-22 Online:2016-05-20 Published:2021-11-12

摘要/Abstract

摘要： 在儿科X射线-CT检查迅速增加的当下,尤其对电离辐射敏感的儿童,其所致医疗照射剂量的评估是十分重要和迫切的课题。本文结合已建立的1岁儿童体素体模,利用蒙特卡罗技术建立扫描模型,进行CT检查所致儿童受检者的医疗照射剂量估算。建立了CT单层轴向扫描时对1岁儿童36个器官或组织所产生医疗照射剂量的数据库,利用该数据库,可快速估算1岁儿童受检者接受CT扫描时的医疗照射剂量。并与同样扫描条件下的实验测量值进行了比较,结果显示二者相对偏差在25%以内。

关键词: 儿科X-CT检查, CT扫描模型, 蒙特卡罗, 医疗照射, 器官剂量

Abstract: With the rapid development and wide application of X-ray CT examination, estimation of the dose from CT exposures has become a hot research spot, especially for children since they tend to have higher radiation sensitivity than adults. In this work, a CT scanner model was developed using the Monte Carlo technique and was applied to estimate organ doses derived from simulated CT exposures with a 1-year-old voxel phantom developed by our group. As a result, a database including doses to 36 organs and tissues was built for 1-year-old children. This medical exposuredose database provides a method for the estimation of 1-year-old patient doses in a variety of CT examinations. And it has been verified by measurement this method is convenient and reliable.

Key words: pediatric CT examination, CT scanner model, Monte Carlo, medical exposure, organ dose

中图分类号:

TL72

潘羽晞, 邱睿, 郑钧正, 高林峰, 李君利. 利用蒙特卡罗建模及估算儿童X-CT检查受照剂量[J]. 辐射防护, 2016, 36(3): 129-134.

Pan Yuxi, Qiu Rui, Zheng Junzheng, Gao Linfeng, Li Junli. Modeling and dose estimation of pediatric X-CT examination using Monte Carlo technique[J]. RADIATION PROTECTION, 2016, 36(3): 129-134.

参考文献

[1] ICRP.Radiological Protection in Medicine[M].ICRP Publication 105. Oxford:Pergamon Press,2008.
[2] 郑钧正,高林峰,卓维海,等.上海市放射诊疗发展趋势与医疗照射防护研究[J]. 辐射防护,2014,34(5):265-273.
[3] ICRP. Managing Patient Dose in Computed Tomography[M]. ICRP Publication 87. Oxford:Pergamon Press,2001.
[4] UNSCEAR. Sources and Effects of Ionizing Radiation,Vol.Ⅰ[M].UNSCEAR 2008 Report. New York:UN,2010.
[5] 王彬,郑钧正,高林峰,等.上海市医用X射线CT的应用频率及其分布研究[J].辐射防护,2013,33(2):65-73.
[6] 郑钧正.医疗照射防护是现代社会必须充分重视与强化的热点课题[J].环境与职业医学, 2014,31(10):755-757.
[7] 高林峰,郑钧正,卓维海,等.医用X射线CT主要检查类型所致成年受检者剂量研究[J].辐射防护,2013,33(2):74-81.
[8] Neves A,Nunes A,Rufino M,et al.Assessment of pediatric CT exposure in a portuguese hospital[J]. Radiation Protection Dosimetry,2012,151:456-462.
[9] Gu J,Bednarz B,Caracappa PF,et al.The development, validation and application of amulti-detector CT(MDCT)scanner model forassessing organ doses to the pregnant patient and thefetus using Monte Carlo simulations[J].Phys Med Biol,2009,54:2 699-2 717.
[10] Gu JW,Xu X,Caracappa PF,et al.Fetal doses to pregnant patients from CT with tube current modulation calculated using Monte Carlo simulations and realistic phantoms[J].Radiation Protection Dosimetry,2013,155:64-72.
[11] Long DJ,Lee C,Tien C,et al.Monte Carlo simulations of adult and pediatric computed tomography exams:Validation studies of organ doses with physical phantoms[J]. Med Phys,2013,40,013901(1-10).
[12] Nowotny VR,Hofer A.Einprogramm fur die BerechungvonfiagnostischenRontgenspektren[J].Fortschr.Rontgenstr,1985,6:685-689.
[13] 刘海宽. X射线诊断所致受检者剂量的估算模式研究[D].上海:复旦大学,2009.
[14] 王栋,邱睿,潘羽晞,等.基于物理体模CT图像的1岁儿童体素体模构建[J].原子能科学技术,2016,50(4):757-762.