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- Title
CAIPIRINHA accelerated SPACE enables 10-min isotropic 3D TSE MRI of the ankle for optimized visualization of curved and oblique ligaments and tendons.
- Authors
Kalia, Vivek; Fritz, Benjamin; Johnson, Rory; Gilson, Wesley; Raithel, Esther; Fritz, Jan; Gilson, Wesley D
- Abstract
<bold>Objectives: </bold>To test the hypothesis that a fourfold CAIPIRINHA accelerated, 10-min, high-resolution, isotropic 3D TSE MRI prototype protocol of the ankle derives equal or better quality than a 20-min 2D TSE standard protocol.<bold>Methods: </bold>Following internal review board approval and informed consent, 3-Tesla MRI of the ankle was obtained in 24 asymptomatic subjects including 10-min 3D CAIPIRINHA SPACE TSE prototype and 20-min 2D TSE standard protocols. Outcome variables included image quality and visibility of anatomical structures using 5-point Likert scales. Non-parametric statistical testing was used. P values ≤0.001 were considered significant.<bold>Results: </bold>Edge sharpness, contrast resolution, uniformity, noise, fat suppression and magic angle effects were without statistical difference on 2D and 3D TSE images (p > 0.035). Fluid was mildly brighter on intermediate-weighted 2D images (p < 0.001), whereas 3D images had substantially less partial volume, chemical shift and no pulsatile-flow artifacts (p < 0.001). Oblique and curved planar 3D images resulted in mildly-to-substantially improved visualization of joints, spring, bifurcate, syndesmotic, collateral and sinus tarsi ligaments, and tendons (p < 0.001, respectively).<bold>Conclusions: </bold>3D TSE MRI with CAIPIRINHA acceleration enables high-spatial resolution oblique and curved planar MRI of the ankle and visualization of ligaments, tendons and joints equally well or better than a more time-consuming anisotropic 2D TSE MRI.<bold>Key Points: </bold>• High-resolution 3D TSE MRI improves visualization of ankle structures. • Limitations of current 3D TSE MRI include long scan times. • 3D CAIPIRINHA SPACE allows now a fourfold-accelerated data acquisition. • 3D CAIPIRINHA SPACE enables high-spatial-resolution ankle MRI within 10 min. • 10-min 3D CAIPIRINHA SPACE produces equal-or-better quality than 20-min 2D TSE.
- Subjects
MAGNETIC resonance imaging; ANKLE; LIGAMENTS; TENDONS; CHEMICAL shift (Nuclear magnetic resonance); LONGITUDINAL method; RESEARCH evaluation; THREE-dimensional imaging; MEDICAL artifacts
- Publication
European Radiology, 2017, Vol 27, Issue 9, p3652
- ISSN
0938-7994
- Publication type
journal article
- DOI
10.1007/s00330-017-4734-y