Free-running 4D whole-heart self-navigated golden angle MRI: Initial results

Purpose To test the hypothesis that both coronary anatomy and ventricular function can be assessed simultaneously using a single four‐dimensional (4D) acquisition. Methods A free‐running 4D whole‐heart self‐navigated acquisition incorporating a golden angle radial trajectory was implemented and test...

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Bibliographic Details
Published in:Magnetic resonance in medicine 2015-11, Vol.74 (5), p.1306-1316
Main Authors: Coppo, Simone, Piccini, Davide, Bonanno, Gabriele, Chaptinel, Jérôme, Vincenti, Gabriella, Feliciano, Hélène, van Heeswijk, Ruud B., Schwitter, Juerg, Stuber, Matthias
Format: Article
Language:English
Subjects:
Adult
Algorithms
cardiac
Cardiac Imaging Techniques - methods
coronary
Female
four dimensional
function
golden angle
Heart - anatomy & histology
Heart - physiology
Humans
Imaging, Three-Dimensional - methods
Magnetic Resonance Imaging - methods
Male
radial
self-navigation
Signal-To-Noise Ratio
whole heart
Young Adult
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Summary:Purpose To test the hypothesis that both coronary anatomy and ventricular function can be assessed simultaneously using a single four‐dimensional (4D) acquisition. Methods A free‐running 4D whole‐heart self‐navigated acquisition incorporating a golden angle radial trajectory was implemented and tested in vivo in nine healthy adult human subjects. Coronary magnetic resonance angiography (MRA) datasets with retrospective selection of acquisition window width and position were extracted and quantitatively compared with baseline self‐navigated electrocardiography (ECG) ‐triggered coronary MRA. From the 4D datasets, the left‐ventricular end‐systolic, end‐diastolic volumes (ESV & EDV) and ejection fraction (EF) were computed and compared with values obtained from conventional 2D cine images. Results The 4D datasets enabled dynamic assessment of the whole heart with isotropic spatial resolution of 1.15 mm3. Coronary artery image quality was very similar to that of the ECG‐triggered baseline scan despite some SNR penalty. A good agreement between 4D and 2D cine imaging was found for EDV, ESV, and EF. Conclusion The hypothesis that both coronary anatomy and ventricular function can be assessed simultaneously in vivo has been tested positive. Retrospective and flexible acquisition window selection allows to best visualize each coronary segment at its individual time point of quiescence. Magn Reson Med 74:1306–1316, 2015. © 2014 Wiley Periodicals, Inc.
ISSN:0740-3194
1522-2594
DOI:10.1002/mrm.25523