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European Radiology
Published in: European Radiology 1/2011

01-01-2011 | Magnetic Resonance

Self-gating MR imaging of the fetal heart: comparison with real cardiac triggering

Authors: Jin Yamamura, Michael Frisch, Hannes Ecker, Joachim Graessner, Kurt Hecher, Gerhard Adam, Ulrike Wedegärtner

Published in: European Radiology | Issue 1/2011

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Abstract

Purpose

To investigate the self-gating technique for MR imaging of the fetal heart in a sheep model.

Material and Methods

MR images of 6 fetal sheep heart were obtained at 1.5T. For self-gating MRI of the fetal heart a cine SSFP in short axis, two and four chamber view was used. Self-gated images were compared with real cardiac triggered MR images (pulse-wave triggering). MRI of the fetal heart was performed using both techniques simultaneously. Image quality was assessed and the left ventricular volume and function were measured and compared.

Results

Compared with pulse-wave triggering, the self-gating technique produced slightly inferior images with artifacts. Especially the atrial septum could not be so clearly depicted. The contraction of the fetal heart was shown in cine sequences in both techniques. The average blood volumes could be measured with both techniques with no significant difference: at end-systole 3.1 ml (SD± 0.2), at end-diastole 4.9 ml (±0.2), with ejection fractions at 38.6%, respectively 39%.

Conclusion

Both self-gating and pulse-wave triggered cardiac MRI of the fetal heart allowed the evaluation of anatomical structures and functional information. Images obtained by self-gating technique were slightly inferior than the pulse-wave triggered MRI.
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Metadata
Title
Self-gating MR imaging of the fetal heart: comparison with real cardiac triggering
Authors
Jin Yamamura
Michael Frisch
Hannes Ecker
Joachim Graessner
Kurt Hecher
Gerhard Adam
Ulrike Wedegärtner
Publication date
01-01-2011
Publisher
Springer-Verlag
Published in
European Radiology / Issue 1/2011
Print ISSN: 0938-7994
Electronic ISSN: 1432-1084
DOI
https://doi.org/10.1007/s00330-010-1911-7

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