Quantication and analysis of respiratory motion from 4D MRI

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 org...

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Bibliographic Details
Published in:Journal of physics. Conference series 2014-01, Vol.546 (1), p.12001-6
Main Authors: Rahni, Ashrani Aizzuddin Abd, Lewis, Emma, Wells, Kevin
Format: Article
Language:English
Subjects:
Beams (radiation)
Image acquisition
Magnetic resonance imaging
Management
Mathematical analysis
Movement
Organs
Physics
Principal component analysis
Principal components analysis
Radiation therapy
Radiotherapy
Vectors (mathematics)
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Summary: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.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/546/1/012001