Movement correction of the kidney in dynamic MRI scans using FFT phase difference movement detection

• Published in: Journal of magnetic resonance imaging Vol. 14; no. 6; pp. 741 - 749
• Main Authors: Giele, E.L.W., de Priester, J.A., Blom, J.A., den Boer, J.A., van Engelshoven, J.M.A., Hasman, A., Geerlings, M.
• Format: Journal Article
• Language: English
• Published: New York John Wiley & Sons, Inc 01-12-2001
• Subjects: Algorithms; contrast enhancement; Contrast Media; dynamic MR; FFT; Gadolinium DTPA; Humans; Image Enhancement; kidney; Kidney Cortex - physiology; Kidney Medulla - physiology; Magnetic Resonance Imaging - methods; Movement; movement correction; Statistics as Topic
• ISSN: 1053-1807; 1522-2586
• DOI: 10.1002/jmri.10020

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. J. Magn. Reson. Imaging 2001;14:741–749. © 2001 Wiley‐Liss, Inc.