Abstract
Objective
The objective of this study was to investigate the performance of k-t BLAST (Broad-use Linear Acquisition Speed-up Technique) accelerated time-resolved 3D PC-MRI compared to SENSE (SENSitivity Encoding) acceleration in an in vitro and in vivo intracranial aneurysm.
Materials and methods
Non-accelerated, SENSE and k-t BLAST accelerated time-resolved 3D PC-MRI measurements were performed in vivo and in vitro. We analysed the consequences of various temporal resolutions in vitro.
Results
Both in vitro and in vivo measurements showed that the main effect of k-t BLAST was underestimation of velocity during systole. In the phantom, temporal blurring decreased with increasing temporal resolution. Quantification of the differences between the non-accelerated and accelerated measurements confirmed that in systole SENSE performed better than k-t BLAST in terms of mean velocity magnitude. In both in vitro and in vivo measurements, k-t BLAST had higher SNR compared to SENSE. Qualitative comparison between measurements showed good similarity.
Conclusion
Comparison with SENSE revealed temporal blurring effects in k-t BLAST accelerated measurements.
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Abbreviations
- PC-MRI:
-
Phase contrast MRI
- k-t BLAST:
-
Broad-use linear acquisition speed-up technique
- SENSE:
-
Sensitivity encoding
- FFE:
-
Fast field echo
- TOF:
-
Time of flight
- NSA:
-
Number of signal averages
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Acknowledgments
The authors would like to thank Gertjan Bon from the University of Amsterdam for the glass blowing of the phantom and Paul Groot of the Department of Radiology of the Academic Medical Centre/University of Amsterdam for the inventive ECG signal acquisition. The authors would also like to thank Gustav Strijkers of the Department of Biomedical NMR of the University of Technology Eindhoven for advice on the manuscript.
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van Ooij, P., Guédon, A., Marquering, H.A. et al. k-t BLAST and SENSE accelerated time-resolved three-dimensional phase contrast MRI in an intracranial aneurysm. Magn Reson Mater Phy 26, 261–270 (2013). https://doi.org/10.1007/s10334-012-0336-5
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DOI: https://doi.org/10.1007/s10334-012-0336-5