Abstract
Objectives
To compare radial volumetric imaging breath-hold examination with k-space weighted image contrast reconstruction (r-VIBE-KWIC) to Cartesian VIBE (c-VIBE) in arterial phase dynamic gadoxetic acid (Gd-EOB-DTPA)-enhanced magnetic resonance imaging (DCE-MRI) of the liver.
Methods
We reviewed 53 consecutive DCE-MRI studies performed on a 3-T unit using c-VIBE and 53 consecutive cases performed using r-VIBE-KWIC with full-frame image subset (r-VIBEfull) and sub-frame image subsets (r-VIBEsub; temporal resolution, 2.5–3 s). All arterial phase images were scored by two readers on: (1) contrast-enhancement ratio (CER) in the abdominal aorta; (2) scan timing; (3) artefacts; (4) visualisation of the common, right, and left hepatic arteries.
Results
Mean abdominal aortic CERs for c-VIBE, r-VIBEfull, and r-VIBEsub were 3.2, 4.3 and 6.5, respectively. There were significant differences between each group (P < 0.0001). The mean score for c-VIBE was significantly lower than that for r-VIBEfull and r-VIBEsub in all factors except for visualisation of the common hepatic artery (P < 0.05). The mean score of all factors except for scan timing for r-VIBEsub was not significantly different from that for r-VIBEfull.
Conclusions
Radial VIBE-KWIC provides higher image quality than c-VIBE, and r-VIBEsub features high temporal resolution without image degradation in arterial phase DCE-MRI.
Key Points
• Radial VIBE-KWIC minimised artefact and produced high-quality and high-temporal-resolution images.
• Maximum abdominal aortic enhancement was observed on sub-frame images of r-VIBE-KWIC.
• Using r-VIBE-KWIC, optimal arterial phase images were obtained in over 90 %.
• Using r-VIBE-KWIC, visualisation of the hepatic arteries was improved.
• A two-reader study revealed r-VIBE-KWIC’s advantages over Cartesian VIBE.
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Abbreviations
- VIBE:
-
Volumetric imaging breath-hold examination
- KWIC:
-
k-space weighted image contrast reconstruction
- DCE-MRI:
-
Dynamic contrast-enhanced magnetic resonance imaging
- CER:
-
Contrast-enhancement ratio
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Acknowledgements
The scientific guarantor of this publication is Prof. Masumi Kadoya. The authors of this manuscript declare no relationships with any companies, whose products or services may be related to the subject matter of the article. The authors state that this work has not received any funding. No complex statistical methods were necessary for this paper. Institutional Review Board approval was obtained. Written informed consent was obtained from all subjects (patients) in this study.
No animal subjects are included in this study. No study subjects or cohorts have been previously reported. Methodology: retrospective, diagnostic study, performed at one institution.
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Fujinaga, Y., Ohya, A., Tokoro, H. et al. Radial volumetric imaging breath-hold examination (VIBE) with k-space weighted image contrast (KWIC) for dynamic gadoxetic acid (Gd-EOB-DTPA)-enhanced MRI of the liver: advantages over Cartesian VIBE in the arterial phase. Eur Radiol 24, 1290–1299 (2014). https://doi.org/10.1007/s00330-014-3122-0
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DOI: https://doi.org/10.1007/s00330-014-3122-0