几种降低锥束CT辐射剂量的方法
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- 英文论文题名：Several Methods for Reducing the Dose of Cone Beam CT
- 论文作者：陈云斌 ; 王远 ; 刘清华
- 英文论文作者：CHEN Yun-bin ; WANG Yuan ; LIU Qing-hua ; Institute of Applied Electronics CAEP ; National X-ray Digital Imaging Instrument Centre
- 年：2016
- 作者机构：中国工程物理研究院应用电子学研究所;国家X射线数字化成像仪器中心;
- 论文关键词：锥束CT ; 辐射剂量 ; 局部扫描 ; 脉冲扫描 ; 短扫描 ; 少投影扫描
- 英文论文关键词：cone beam CT ; radiation dose ; local scan ; pulse scan ; short scan ; view reduced scan
- 会议召开时间：2016-09-20
- 会议录名称：2016年全国射线数字成像与CT新技术研讨会论文集
- 语种：中文
- 分类号：R814.2;TP391.41
- 学会代码：EGTA
- 会议名称：2016年全国射线数字成像与CT新技术研讨会
- 会议地点：中国四川成都
- 主办单位：中国体视学学会CT理论与应用分会
- 学会名称：中国体视学学会
- 页数：7
- 文件大小：1680k
- 原文格式：O
- 会议级别：全国
摘要
干伏级锥束CT在放射治疗、外科手术、口腔疾病诊断等领域都有广泛的应用。然而,频繁地使用千伏级锥束CT,也会给患者甚至医生带来额外的射线辐射损伤。相关统计结果表明,X射线辐射能够诱发很多癌症的发生,特别是儿童和女性对射线辐射异常敏感。因此,合理使用锥束CT,同时降低锥束CT辐射剂量,对于降低射线辐射并发症风险显得非常重要。本文总结了降低锥束CT辐射剂量的常用措施,包括降低管电流、局部扫描、脉冲扫描、短扫描以及少投影扫描。辐射剂量的降低有可能会在重建图像中引入噪声、伪影。针对特定的问题,本文也提出了对应的补偿方法。
Kilovoltage cone beam CT has been widely used in radiotherapy,surgical operation and dental diagnosis.However,frequent use of kilovoltage cone beam CT will deliver extra radiation damage to patients,even doctors.Associated statistical results show that most cancers can be induced by X-ray radiation.Meanwhile children and women are especially sensitive to radiation.So reasonable use of cone beam CT and limiting the radiation dose of cone beam CT are very important to reduce the risk of disease induced by radiation.This paper summarizes some techniques of reducing radiation dose of cone beam CT,including lower current,local scan,pulse scan,short scan and view reduced scan.Dose reduction may cause noise or artifacts in image domain.To specific issue,corresponding correcting methods were also proposed in this paper.
Kilovoltage cone beam CT has been widely used in radiotherapy,surgical operation and dental diagnosis.However,frequent use of kilovoltage cone beam CT will deliver extra radiation damage to patients,even doctors.Associated statistical results show that most cancers can be induced by X-ray radiation.Meanwhile children and women are especially sensitive to radiation.So reasonable use of cone beam CT and limiting the radiation dose of cone beam CT are very important to reduce the risk of disease induced by radiation.This paper summarizes some techniques of reducing radiation dose of cone beam CT,including lower current,local scan,pulse scan,short scan and view reduced scan.Dose reduction may cause noise or artifacts in image domain.To specific issue,corresponding correcting methods were also proposed in this paper.
引文
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[2]Michele Morin Doody,John E.Lonstein,Marilyn Stovall,et al.Breast cancer mortality after diagnostic radiography:findings from the U.S.Scoliosis Cohort Study[J].Spine,2000,25(16):2052-2063.
[3]Claire Infante-Rivard,Geraldine Mathonnet,Daniel Sinnett.Risk of childhood leukemia associated with diagnostic irradiation and polymorphisms in DNA repair genes[J].Environmental Health Perspectives,2000,108(6):495-498.
[4]David J.Brenner,Carl D.Elliston,Eric J.Hall,et al.Estimated risks of radiation induced fatal cancer from pediatric CT[J].AJR,2001,176:289-296.
[5]Jing Wang,Tianfang Li,Zhengrong Liang,et al.Dose reduction for kilovotage cone-beam computed tomography in radiation therapy[J].Physics in medicine and biology,2008,53:2897-2909.
[6]陈云斌,温俊海,汪莉等.非均匀衰减锥形投影SPECT局部重建[J].仪器仪表学报,2010,31(4):845-850.
[7]Jared Starman,Norbert Pelc,Norbert Strobel,et al.Estimating 0 th and 1 st moments in C-Arm CT data for extrapolating truncated project ions[J].Medical imaging,2005:378-387.
[8]Emil Y.Sidky,Chien-Min Kao and Xiaochuan Pan.Accurate image reconstruction from few-view and limited-angle data in divergent-beam CT[J].Journal of X-Ray Science and Technology,2006,14:119-139.