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 Scott^1,2, Jenny Keegan², David Firmin^1,2

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.