Whole‐Heart Coronary MRA with 3D Affine Motion Correction Using 3D Image‐Based Navigation. Issue 1 (11th February 2013)

• Record Type: Journal Article
• Authors: Henningsson, Markus; Prieto, Claudia; Chiribiri, Amedeo; Vaillant, Ghislain; Razavi, Reza; Botnar, René M
• Is Part Of: Magnetic resonance in medicine. Volume 71:Issue 1(2014:Jan.)
• Page Start: 173
• Page End: 181
• Publication Date: 2013-02-11
• Subjects: Nuclear magnetic resonance -- Periodicals; Electron paramagnetic resonance -- Periodicals; 616.07548
• DOI: 10.1002/mrm.24652
• Languages: English
• ISSNs: 0740-3194

Abstract

<abstract abstract-type="main"> <title> <x xml:space="preserve">Abstract</x> </title> <sec id="mrm24652-sec-0001" sec-type="section"> <title>Purpose</title> <p>Robust motion correction is necessary to minimize respiratory motion artefacts in coronary MR angiography (CMRA). The state‐of‐the‐art method uses a 1D feet‐head translational motion correction approach, and data acquisition is limited to a small window in the respiratory cycle, which prolongs the scan by a factor of 2–3. The purpose of this work was to implement 3D affine motion correction for Cartesian whole‐heart CMRA using a 3D navigator (3D‐NAV) to allow for data acquisition throughout the whole respiratory cycle.</p> </sec> <sec id="mrm24652-sec-0002" sec-type="section"> <title>Methods</title> <p>3D affine transformations for different respiratory states (bins) were estimated by using 3D‐NAV image acquisitions which were acquired during the startup profiles of a steady‐state free precession sequence. The calculated 3D affine transformations were applied to the corresponding high‐resolution Cartesian image acquisition which had been similarly binned, to correct for respiratory motion between bins.</p> </sec> <sec id="mrm24652-sec-0003" sec-type="section"> <title>Results</title> <p>Quantitative and qualitative comparisons showed no statistical difference between images acquired with the proposed method and the reference method using a diaphragmatic navigator with a narrow gating window.</p> </sec> <sec id="mrm24652-sec-0004" sec-type="section"> <title>Conclusion</title> <p>We demonstrate that 3D‐NAV and 3D affine correction can be used to acquire Cartesian whole‐heart 3D coronary artery images with 100% scan efficiency with similar image quality as with the state‐of‐the‐art gated and corrected method with approximately 50% scan efficiency. <bold>Magn Reson Med 71:173–181, 2014. © 2013 Wiley Periodicals, Inc.</bold></p> </sec> </abstract>