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01-06-2014 | Magnetic Resonance

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

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

Published in: European Radiology | Issue 6/2014

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-VIBE_full) and sub-frame image subsets (r-VIBE_sub; 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-VIBE_full, and r-VIBE_sub 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-VIBE_full and r-VIBE_sub 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-VIBE_sub was not significantly different from that for r-VIBE_full.

Conclusions

Radial VIBE-KWIC provides higher image quality than c-VIBE, and r-VIBE_sub 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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Title: 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
Authors: Yasunari Fujinaga
Ayumi Ohya
Hirokazu Tokoro
Akira Yamada
Kazuhiko Ueda
Hitoshi Ueda
Yoshihiro Kitou
Yasuo Adachi
Aya Shiobara
Naomichi Tamaru
Marcel D. Nickel
Katsuya Maruyama
Masumi Kadoya
Publication date: 01-06-2014
Publisher: Springer Berlin Heidelberg
Published in: European Radiology / Issue 6/2014
Print ISSN: 0938-7994
Electronic ISSN: 1432-1084
DOI: https://doi.org/10.1007/s00330-014-3122-0

At a glance: The STEP trials

Springer Medicine

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

Abstract

Objectives

Methods

Results

Conclusions

Key Points

At a glance: The STEP trials

Springer Medicine

Abstract

Objectives

Methods

Results

Conclusions

Key Points

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