集成技术2025，Vol.14Issue(2)：71-85,15.DOI:10.12146/j.issn.2095-3135.20241021001
锥形束CT中简单动态滤波策略的数值验证
Numerical Validation of A Simple Dynamic Beam Filtration Strategy in Cone Beam CT
摘要
Abstract
For cone beam computed tomography(CBCT),there has long been a desire to modulate the intensity and distribution of the X-rays to accommodate the patient's anatomy as the gantry rotates from one projection to another.This would reduce both image artifacts and radiation dose.However,the current beam modulation setups,such as dynamic bowtie filters,may be too complex for practical use in clinical applications.This study aimed to investigate a simplified dynamic beam filtration strategy for CBCT imaging to reduce image artifacts and radiation dose.In this study,the beam filtration was designed to vary dynamically as the CBCT gantry rotates around the object.Specifically,two distinct components were integrated:the sheet filter part and the bowtie filter part.The dynamic beam filtration setup has two working schemes,one is a combination of dynamic sheet filter and dynamic bowtie filter,denoted as dynamic filter-dynamic bowtie(DFDB);the other is a combination of dynamic sheet filter and static bowtie filter,denoted as dynamic filter-static bowtie(DFSB).Numerical imaging experiments were performed for three human body parts:the shoulder,chest,and knee.In addition,the Monte Carlo simulation platform MC-GPU was used to generate the dose distribution maps.Results showed that the proposed DFDB and DFSB beam filtration schemes can significantly reduce the image artifacts and thus improve the CBCT image quality.Depending on the scanned object,the total radiation dose could be reduced by 30%.The proposed simple dynamic beam filtration strategy,especially the DFSB approach,could be beneficial in the future to improve the CBCT image quality with reduced image artifacts and radiation dose.关键词
动态滤波/辐射剂量降低/硬化伪影减少/锥束CTKey words
dynamic filtration/radiation dose reduction/artifacts reduction/cone beam computed tomography分类
医药卫生引用本文复制引用
王鹤然,谢吉雄,朱炯滔,张欣,谭雨航,苏婷,葛永帅..锥形束CT中简单动态滤波策略的数值验证[J].集成技术,2025,14(2):71-85,15.基金项目
国家自然科学基金项目(12305349,12235006,12027812) （12305349,12235006,12027812）
深圳市科技计划项目(JSGGKQTD20210831174329010) （JSGGKQTD20210831174329010）
广东省基础与应用基础研究基金项目((2021TQ06Y108) This work was supported in part by National Natural Science Foundation of China(12305349,12235006,12027812),Shenzhen Science and Technology Program(JSGGKQTD20210831174329010),Guangdong Basic and Applied Basic Research Foundation(2021TQ06Y108) （(2021TQ06Y108）
