9 March 2018 Motion compensated reconstruction of the aortic valve for computed tomography
Author Affiliations +
Motion compensated cardiac reconstruction in computed tomography (CT) has traditionally been focused on coronary arteries. However, with the increasing number of cardiac CT scans being performed for the diagnosis and treatment planning of valvular diseases, there is a clear need for motion correction of the aortic valve region to assist with the reproducibility of aortic annulus measurements. A second pass approach for aortic valve motion compensation on retrospective ECG-gated CT scans is introduced here. The processing chain is comprised of four steps. A gated multi-phase cardiac reconstruction is first performed, followed by a gradient based filter to enhance the edges in the resulting time series of volume images. Subsequently these normalized filtered results are made to undergo an elastic registration and finally followed by a motion compensated reconstruction that includes the estimated motion vector fields. The method was applied to twelve clinical cases and tested for systolic (30% R-R interval) and diastolic (70% R-R interval) imaging of the aortic valve. This second pass approach leads to a significant reduction of motion artifacts especially in late systole.
© (2018) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
T. Elss, T. Elss, R. Bippus, R. Bippus, H. Schmitt, H. Schmitt, T. Ivanc, T. Ivanc, M. Morlock, M. Morlock, M. Grass, M. Grass, } "Motion compensated reconstruction of the aortic valve for computed tomography ", Proc. SPIE 10573, Medical Imaging 2018: Physics of Medical Imaging, 1057331 (9 March 2018); doi: 10.1117/12.2292877; https://doi.org/10.1117/12.2292877


Back to Top