Quantication and analysis of respiratory motion from 4D MRI

9th National Seminar on Medical Physics

物理学;医药卫生

Rahni, Ashrani Aizzuddin Abd^1 ; Lewis, Emma^2 ; Wells, Kevin^2

Department of Electrical, Electronic and System Engineering, Faculty of Engineering and Built Environment, Universiti Kebangsaan Malaysia, UKM Bangi, Selangor

43600, Malaysia^1

Centre for Vision, Speech and Signal Processing, University of Surrey, Guildford, Surrey

GU2 7XH, United Kingdom^2

关键词: External beam radiotherapy;    Image-based;    In-depth analysis;    Internal motion;    Motion correction;    Motion Vectors;    Respiratory motions;    Treatment planning;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/546/1/012001/pdf
DOI  :  10.1088/1742-6596/546/1/012001

学科分类：卫生学

来源: IOP

【 摘 要 】

It is well known that respiratory motion affects image acquisition and also external beam radiotherapy (EBRT) treatment planning and delivery. However often the existing approaches for respiratory motion management are based on a generic view of respiratory motion such as the general movement of organ, tissue or fiducials. This paper thus aims to present a more in depth analysis of respiratory motion based on 4D MRI for further integration into motion correction in image acquisition or image based EBRT. Internal and external motion was first analysed separately, on a per-organ basis for internal motion. Principal component analysis (PCA) was then performed on the internal and external motion vectors separately and the relationship between the two PCA spaces was analysed. The motion extracted from 4D MRI on general was found to be consistent with what has been reported in literature.