Published in:
01-05-2017 | Magnetic Resonance
3D-black-blood 3T-MRI for the diagnosis of thoracic large vessel vasculitis: A feasibility study
Authors:
Karla Maria Treitl, Stefan Maurus, Nora Narvina Sommer, Hendrik Kooijman-Kurfuerst, Eva Coppenrath, Marcus Treitl, Michael Czihal, Ulrich Hoffmann, Claudia Dechant, Hendrik Schulze-Koops, Tobias Saam
Published in:
European Radiology
|
Issue 5/2017
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Abstract
Objectives
To evaluate the feasibility of T1w-3D black-blood turbo spin echo (TSE) sequence with variable flip angles for the diagnosis of thoracic large vessel vasculitis (LVV).
Methods
Thirty-five patients with LVV, diagnosed according to the current standard of reference, and 35 controls were imaged at 3.0T using 1.2 × 1.3 × 2.0 mm3 fat-suppressed, T1w-3D, modified Volumetric Isotropic TSE Acquisition (mVISTA) pre- and post-contrast. Applying a navigator and peripheral pulse unit triggering (PPU), the total scan time was 10–12 min. Thoracic aorta and subclavian and pulmonary arteries were evaluated for image quality (IQ), flow artefact intensity, diagnostic confidence, concentric wall thickening and contrast enhancement (CWT, CCE) using a 4-point scale.
Results
IQ was good in all examinations (3.25 ± 0.72) and good to excellent in 342 of 408 evaluated segments (83.8 %), while 84.1 % showed no or minor flow artefacts. The interobserver reproducibility for the identification of CCE and CWT was 0.969 and 0.971 (p < 0.001) with an average diagnostic confidence of 3.47 ± 0.64. CCE and CWT were strongly correlated (Cohen’s k = 0.87; P < 0.001) and significantly more frequent in the LVV-group (52.8 % vs. 1.0 %; 59.8 % vs. 2.4 %; P < 0.001).
Conclusions
Navigated fat-suppressed T1w-3D black-blood MRI with PPU-triggering allows diagnosis of thoracic LVV.
Key Points
• Cross-sectional imaging is frequently applied in the diagnosis of LVV.
• Navigated, PPU-triggered, T1w-3D mVISTA pre- and post contrast takes 10–12 min.
• In this prospective, single-centre study, T1w-3D mVISTA accurately depicted large thoracic vessels.
• T1w-3D mVISTA visualized CWT/CCW as correlates of mural inflammation in LVV.
• T1w-3D mVISTA might be an alternative diagnostic tool without ionizing radiation.