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Abstract #3824

Design and Validation of an Accurate, Reproducible and MR Compatible Respiratory Motion Phantom for Use in Coronary Artery and General MR Imaging

Andrew David Scott1,2, Jenny Keegan2, David Firmin1,2

1Cardiovascular Magnetic Resonance Unit, National Heart and Lung Institute, Imperial College London, London, UK; 2Cardiovascular Magnetic Resonance Unit, The Royal Brompton Hospital, London, UK

An MR compatible mechanical phantom that can follow real or simulated respiratory traces, and which can be used with a number of test objects including realistic coronary vessel wall phantoms, was designed. Motion of the phantom has been shown to be consistent and accurate with an RMS error of 0.22mm (<2% amplitude) using sinusoidal and real respiratory motion profiles. The phantom was used to validate motion information derived from a sub-pixel normalised cross correlation of 3D low resolution fat images which is used for correcting 3D high resolution water only images of a moving coronary artery lumen phantom.