Movement correction of the kidney in dynamic MRI scans using FFT phase difference movement detection.
To measure cortical and medullary MR renograms, regions of interest (ROIs) are placed on the kidney in images acquired using dynamic MRI. Since native kidneys move with breathing, and breath-holding techniques are not feasible, movement correction is necessary. In this contribution we compare three correction methods, based on image matching, phase difference movement detection (PDMD), and cross-correlation, respectively. The PDMD-based method showed the best performance and was able to determine kidney movement in our test series in 68% of the scans with no visible deviation, and in 88% of the scans if a one-pixel deviation is considered acceptable.
Giele
E L
EL
Department of Measurement and Control Systems, Eindhoven University of Technology, AZ Eindhoven, The Netherlands. eelco@stack.nl
de Priester
J A
JA
Blom
J A
JA
den Boer
J A
JA
van Engelshoven
J M
JM
Hasman
A
A
Geerlings
M
M
D000465:Algorithms; D003287:Contrast Media; D019786:Gadolinium DTPA; D006801:Humans; D007089:Image Enhancement; D007672:Kidney Cortex / Q000502:physiology*; D007679:Kidney Medulla / Q000502:physiology*; D008279:Magnetic Resonance Imaging / Q000379:methods*; D009068:Movement; D013223:Statistics as Topic
D003287:Contrast Media; D019786:Gadolinium DTPA