3D Dose reconstruction: Banding artefacts in cine mode EPID images during VMAT delivery

7th International Conference on 3D Radiation Dosimetry

Woodruff, H.C.^1 ; Greer, P.B.^1,2

School of Medicine and Public Health, University of Newcastle, Newcastle, NSW 2308, Australia^1

Calvary Mater Newcastle Hospital, Newcastle, NSW 2298, Australia^2

关键词: Dose reconstruction;    Field images;    Pulse sequence;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/444/1/012042/pdf
DOI  :  10.1088/1742-6596/444/1/012042

来源: IOP

【 摘 要 】

Cine (continuous) mode images obtained during VMAT delivery are heavily degraded by banding artefacts. We have developed a method to reconstruct the pulse sequence (and hence dose deposited) from open field images. For clinical VMAT fields we have devised a frame averaging strategy that greatly improves image quality and dosimetric information for three-dimensional dose reconstruction.