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Navigator gated high temporal resolution tissue phase mapping of myocardial motion
Author(s) -
Jung Bernd,
Zaitsev Maxim,
Hennig Jürgen,
Markl Michael
Publication year - 2006
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.20808
Subject(s) - temporal resolution , contrast (vision) , ventricle , cardiac cycle , high resolution , image resolution , computer science , biomedical engineering , nuclear medicine , artificial intelligence , medicine , cardiology , physics , remote sensing , geology , quantum mechanics
Abstract Data acquisition for phase contrast velocity mapping of myocardial motion is typically based on multiple breath‐held 2D measurements with limited acquisition duration and consequently relatively poor temporal resolution. In order to overcome the limitations of breath‐hold acquisitions, an improved navigator‐guided technique was implemented based on 2 navigator signals within each cardiac cycle in combination with paired acceptance and rejection criteria of successive navigator signals. Respiratory gated phase contrast measurements with 3‐directional velocity encoding were performed in 12 healthy volunteers in basal, midventricular, and apical locations of the left ventricle during free breathing with a temporal resolution of 13.8 ms. Results were compared to standard breath‐hold measurements with a temporal resolution of 69 ms. Data from the high temporal resolution study revealed details in left ventricular motion patterns that were previously not seen in phase contrast measurements and are only known from echocardiography. The proposed navigator gated technique for high temporal resolution velocity mapping is, therefore, highly promising for the detection of local and global motion abnormalities in patients with disturbed left ventricular performance, such as diastolic dysfunction. Magn Reson Med, 2006. © 2006 Wiley‐Liss, Inc.