Abstract
Purpose
3D multi-echo gradient-recalled echo (ME-GRE) can simultaneously generate time-of-flight magnetic resonance angiography (pTOF) in addition to T2*-based susceptibility-weighted images (SWI). We assessed the clinical performance of pTOF generated from a 3D ME-GRE acquisition compared with conventional TOF-MRA (cTOF).
Methods
Eighty consecutive children were retrospectively identified who obtained 3D ME-GRE alongside cTOF. Two blinded readers independently assessed pTOF derived from 3D ME-GRE and compared them with cTOF. A 5-point Likert scale was used to rank lesion conspicuity and to assess for diagnostic confidence.
Results
Across 80 pediatric neurovascular pathologies, a similar number of lesions were reported on pTOF and cTOF (43–40%, respectively, p > 0.05). Rating of lesion conspicuity was higher with cTOF (4.5 ± 1.0) as compared with pTOF (4.0 ± 0.7), but this was not significantly different (p = 0.06). Diagnostic confidence was rated higher with cTOF (4.8 ± 0.5) than that of pTOF (3.7 ± 0.6; p < 0.001). Overall, the inter-rater agreement between two readers for lesion count on pTOF was classified as almost perfect (κ = 0.98, 96% CI 0.8–1.0).
Conclusions
In this study, TOF-MRA simultaneously generated in addition to SWI from 3D MR-GRE can serve as a diagnostic adjunct, particularly for proximal vessel disease and when conventional TOF-MRA images are absent.
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Preliminary results from this article was presented at the American Society of Neuroradiology 2016 Annual Meeting, May 21-26, Washington, DC. Funding support was provided by ASNR Comparative Effectiveness Grant and NIH grant 1R21HD08380301A1.
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All procedures performed in studies involving human participants were in accordance with the ethical standards of the Stanford University Institutional Review Board in the Research Compliance Office (RCO). The study protocol number is 44683.
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Lanzman, B.A., Huang, Y., Lee, E.H. et al. Simultaneous time of flight-MRA and T2* imaging for cerebrovascular MRI. Neuroradiology 63, 243–251 (2021). https://doi.org/10.1007/s00234-020-02499-5
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DOI: https://doi.org/10.1007/s00234-020-02499-5