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.
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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. |
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| Authors: | Fujinaga, Yasunari1 fujinaga@shinshu-u.ac.jp, Ohya, Ayumi1, Tokoro, Hirokazu1, Yamada, Akira1, Ueda, Kazuhiko1, Ueda, Hitoshi2, Kitou, Yoshihiro2, Adachi, Yasuo2, Shiobara, Aya2, Tamaru, Naomichi2, Nickel, Marcel3, Maruyama, Katsuya4, Kadoya, Masumi1 |
| Source: | European Radiology. Jun2014, Vol. 24 Issue 6, p1290-1299. 10p. 5 Black and White Photographs, 3 Charts, 2 Graphs. |
| Subjects: | Hepatic artery, Liver, Abdominal aorta, Magnetic resonance imaging, Image quality in radiography |
| 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) and sub-frame image subsets (r-VIBE; 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, and r-VIBE 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 and r-VIBE 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 was not significantly different from that for r-VIBE. Conclusions: Radial VIBE-KWIC provides higher image quality than c-VIBE, and r-VIBE 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. [ABSTRACT FROM AUTHOR] |
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| Database: | Engineering Source |
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