A 3D MR-acquisition scheme for non-rigid bulk motion correction in simultaneous PET-MR
Christoph Kolbitsch 1 , Claudia Prieto 1 , Charalampos Tsoumpas 1 , and Tobias Scheaffter 1
Division of Imaging Sciences and Biomedical
Engineering, King's College London, London, London,
Positron emission tomography (PET) is commonly used to
detect tumours and assess the progress of cancer
treatment by measuring standardized uptake values (SUV).
Physiological motion such as bulk-motion shifts during
data acquisition can negatively impair obtained SUV.
Here we evaluate a simultaneous PET-MR acquisition to
detect and correct for any non-rigid bulk motion shifts
directly from acquired gradient or spin echo MR data
without the need of additional motion information.
Volunteer studies show an accuracy of 1.71 0.29mm for
the obtained motion information reducing SUV errors in
motion corrected PET simulations from 65% to below 10%.
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