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European Radiology
Published in: European Radiology 8/2016

01-08-2016 | Hepatobiliary-Pancreas

Advantages of radial volumetric breath-hold examination (VIBE) with k-space weighted image contrast reconstruction (KWIC) over Cartesian VIBE in liver imaging of volunteers simulating inadequate or no breath-holding ability

Authors: Yasunari Fujinaga, Yoshihiro Kitou, Ayumi Ohya, Yasuo Adachi, Naomichi Tamaru, Aya Shiobara, Hitoshi Ueda, Marcel D. Nickel, Katsuya Maruyama, Masumi Kadoya

Published in: European Radiology | Issue 8/2016

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Abstract

Objectives

To investigate the superiority of radial volumetric breath-hold examination (r-VIBE) with k-space weighted image contrast reconstruction (KWIC) over Cartesian VIBE (c-VIBE) for reducing motion artefacts.

Methods

We acquired r-VIBE-KWIC and c-VIBE images in 10 healthy volunteers. Each acquisition lasted 24 seconds. The volunteers held their breath for decreasing lengths of time during the acquisitions, from 24 to 0 seconds (protocols A–E). Magnetic resonance images at the level of the right portal vein and confluence of hepatic veins were assessed by two readers using a five-point scale with a higher number indicating a better study.

Results

The mean scores for the complete r-VIBE-KWIC series (r-VIBEfull) and first r-VIBE-KWIC series (r-VIBE1) were not significantly lower than those for c-VIBE in any protocols. The mean scores for c-VIBE were lower than those for r-VIBEfull and r-VIBE1 in protocols C and D. The mean score for c-VIBE was lower than that for r-VIBEfull in protocol E. The mean score for the eighth r-VIBE-KWIC series (r-VIBE8) was lower than that for c-VIBE only in protocol B.

Conclusion

r-VIBE-KWIC minimised artefacts relative to c-VIBE at any slice location. The r-VIBE-KWIC’s sub-frame images during the breath-holding period were hardly affected by another failed breath-holding period.

Key Points

• A two-reader study revealed r-VIBE-KWIC’s advantages over c-VIBE
• The image quality of r-VIBE-KWIC’s sub-frame images was maintained during breath holding
• Full-frame r-VIBE-KWIC images minimized motion artefacts caused by breathing
• A complete breath holding over half the acquisition time is recommended for c-VIBE
• c-VIBE was susceptible to respiratory motion especially in the subphrenic region
Literature
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Chandarana H, Block KT, Winfeld MJ et al (2014) Free-breathing contrast-enhanced T1-weighted gradient-echo imaging with radial k-space sampling for paediatric abdominopelvic MRI. Eur Radiol 24:320–326CrossRefPubMed
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Metadata
Title
Advantages of radial volumetric breath-hold examination (VIBE) with k-space weighted image contrast reconstruction (KWIC) over Cartesian VIBE in liver imaging of volunteers simulating inadequate or no breath-holding ability
Authors
Yasunari Fujinaga
Yoshihiro Kitou
Ayumi Ohya
Yasuo Adachi
Naomichi Tamaru
Aya Shiobara
Hitoshi Ueda
Marcel D. Nickel
Katsuya Maruyama
Masumi Kadoya
Publication date
01-08-2016
Publisher
Springer Berlin Heidelberg
Published in
European Radiology / Issue 8/2016
Print ISSN: 0938-7994
Electronic ISSN: 1432-1084
DOI
https://doi.org/10.1007/s00330-015-4103-7

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