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

作者：Fujinaga Yasunari^*; Kitou Yoshihiro; Ohya Ayumi; Adachi Yasuo; Tamaru Naomichi; Shiobara Aya; Ueda Hitoshi; Nickel Marcel D; Maruyama Katsuya; Kadoya Masumi

来源：European Radiology, 2016, 26(8): 2790-2797.

DOI：10.1007/s00330-015-4103-7

• Radial VIBE
• k-space weighted image contrast
• Dynamic contrast-enhanced MRI
• Liver
• Motion artefact

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.
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.
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.
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.
aEuro cent A two-reader study revealed r-VIBE-KWIC's advantages over c-VIBE
aEuro cent The image quality of r-VIBE-KWIC's sub-frame images was maintained during breath holding
aEuro cent Full-frame r-VIBE-KWIC images minimized motion artefacts caused by breathing
aEuro cent A complete breath holding over half the acquisition time is recommended for c-VIBE
aEuro cent c-VIBE was susceptible to respiratory motion especially in the subphrenic region.

• 出版日期2016-8