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Dynamic range extension of cine velocity measurements using motion registered spatiotemporal phase unwrapping
Author(s) -
Yang Guang Z.,
Burger Peter,
Kilner Philip J.,
Karwatowski Stefan P.,
Firmin David N.
Publication year - 1996
Publication title -
journal of magnetic resonance imaging
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.563
H-Index - 160
eISSN - 1522-2586
pISSN - 1053-1807
DOI - 10.1002/jmri.1880060313
Subject(s) - aliasing , phase (matter) , phase unwrapping , ghosting , inter frame , pixel , range (aeronautics) , computer science , residual , temporal resolution , dynamic range , signal (programming language) , computer vision , artificial intelligence , reference frame , physics , optics , frame (networking) , algorithm , materials science , interferometry , undersampling , telecommunications , quantum mechanics , composite material , programming language
A motion‐registered spatiotemporal phase‐unwrapping method for extending the dynamic range of cine magnetic resonance phase velocity measurements is presented. The interframe cardiac movement is estimated from the magnitude image derived from the velocity encoded raw data, which ensures that the phase signal is unwrapped in the temporal direction with reference to pixels belonging to the same anatomic flow region. An extra step of spatial phase correction is then used to further eliminate any residual errors. The combination of spatial and temporal information for phase unwrapping provides a robust way of extending the dynamic range of cine velocity data in the presence of large phase aliasing errors.