title: Movement correction of the kidney in dynamic MRI scans using FFT phase difference movement detection.
abstract: 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.
authors.affiliation: Department of Measurement and Control Systems, Eindhoven University of Technology, AZ Eindhoven, The Netherlands. eelco@stack.nl
authors.forename: E L
authors.initials: EL
authors.lastname: Giele
authors.forename: J A
authors.initials: JA
authors.lastname: de Priester
authors.forename: J A
authors.initials: JA
authors.lastname: Blom
authors.forename: J A
authors.initials: JA
authors.lastname: den Boer
authors.forename: J M
authors.initials: JM
authors.lastname: van Engelshoven
authors.forename: A
authors.initials: A
authors.lastname: Hasman
authors.forename: M
authors.initials: M
authors.lastname: Geerlings
mesh_terms: 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
chemical_list: D003287:Contrast Media; D019786:Gadolinium DTPA