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Prospective respiratory motion correction for coronary MR angiography using a 2D image navigator
Author(s) -
Henningsson Markus,
Smink Jouke,
Razavi Reza,
Botnar René M.
Publication year - 2013
Publication title -
magnetic resonance in medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.696
H-Index - 225
eISSN - 1522-2594
pISSN - 0740-3194
DOI - 10.1002/mrm.24280
Subject(s) - medicine , magnetic resonance imaging , gating , magnetic resonance angiography , imaging phantom , coronary arteries , diaphragmatic breathing , image quality , radiology , artifact (error) , coronary angiography , nuclear medicine , cardiology , artery , computer science , computer vision , image (mathematics) , physiology , alternative medicine , pathology , myocardial infarction
Respiratory motion remains the major impediment in a substantial amount of patients undergoing coronary magnetic resonance angiography. Motion correction in coronary magnetic resonance angiography is typically performed with a diaphragmatic 1D navigator (1Dnav) assuming a constant linear relationship between diaphragmatic and cardiac respiratory motion. In this work, a novel 2D navigator (2Dnav) is proposed, which prospectively corrects for translational motion in foot–head and left–right direction. First, 1Dnav‐ and 2Dnav‐based motion correction are compared in 2D real time imaging experiments, by evaluating the residual respiratory motion in 10 healthy subjects as well as in a moving vessel phantom. Subsequently, 1Dnav and 2Dnav corrected high‐resolution 3D coronary MR angiograms were acquired, and both objective and subjective image quality were assessed. For a gating window of 10 mm, 1Dnav and 2Dnav performed equally well; however, without any respiratory gating, the 1Dnav had a lower visual score for all coronary arteries compared with 10 mm gating, whereas the 2Dnav without gating performed similar to 1Dnav with 10 mm gating. Magn Reson Med, 2013. © 2012 Wiley Periodicals, Inc.