摘要：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 *** would reduce both image artifacts and radiation ***,the current beam modulation setups,such as dynamic bowtie filters,may be too complex for practical use in clinical *** study aimed to investigate a simplified dynamic beam filtration strategy for cBcT imaging to reduce image artifacts and radiation *** this study,the beam filtration was designed to vary dynamically as the cBcT gantry rotates around the ***,two distinct components were integrated:the sheet filter part and the bowtie filter *** dynamic beam filtration setup has two working schemes,one is a combination of dynamic sheet filter and dynamic bowtie filter,denoted as dynamic filterdynamic 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 *** addition,the Monte carlo simulation platform Mc-GPU was used to generate the dose distribution *** showed that the proposed DFDB and DFSB beam filtration schemes can significantly reduce the image artifacts and thus improve the cBcT image *** 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.