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Integrated Deep Learning-Based Intracranial Vessel Wall Imaging with DANTE Preparation: Feasibility and Technical

Pranjal Rai1, Vincent Ern Yao Chan2, John C Benson2

  • 1From the Department of Radiology (P.R., V.E.Y.C., J.C.B., F.E.D., P.M.F., V.M.S., S.A.M., G.B.), Mayo Clinic, 200 1st Street Southwest, Rochester, MN, 55902; Siemens Medical Solutions USA (P.K.), Rochester, MN, 55901; and Research and Clinical Translation (A.S.D.-P, M.D.N.), Magnetic Resonance, Siemens Healthineers AG, Erlangen, Germany. raipranjal2@gmail.com.

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Adding Delay Alternating with Nutation for Tailored Excitation (DANTE) preparation to deep learning-accelerated intracranial vessel wall imaging (IC-VWI) reduced artifacts and improved lumen visualization. However, this enhancement came with a slight decrease in vessel wall depiction.

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Area of Science:

  • Medical Imaging
  • Neuroradiology
  • Cardiovascular Imaging

Background:

  • Intracranial vessel wall imaging (IC-VWI) is crucial for diagnosing cerebrovascular diseases.
  • Deep learning (DL) acceleration improves IC-VWI efficiency.
  • Optimizing contrast enhancement and artifact reduction in IC-VWI remains a challenge.

Purpose of the Study:

  • To assess the feasibility and performance of incorporating Delay Alternating with Nutation for Tailored Excitation (DANTE) preparation into a DL-accelerated post-contrast T1-SPACE sequence for IC-VWI.
  • To evaluate the impact of DANTE preparation on lumen and wall visualization and venous flow artifacts.

Main Methods:

  • Retrospective analysis of 35 patients undergoing IC-VWI with and without DANTE preparation.
  • Comparison of DL-T1-SPACE with DANTE (T1-SPACEDL+DANTE) versus DL-T1-SPACE (T1-SPACEDL).
  • Neuroradiologist scoring of lumen/wall visualization and venous flow artifacts; statistical analysis using CLMMs and Wilcoxon tests.

Main Results:

  • T1-SPACEDL+DANTE significantly improved lumen visualization (pooled OR 40.02) compared to T1-SPACEDL.
  • T1-SPACEDL+DANTE reduced vessel wall visualization (pooled OR 0.11).
  • Venous flow artifacts were significantly reduced across all analyzed venous subsites with DANTE preparation (p<0.001).

Conclusions:

  • Integrating DANTE preparation into DL-accelerated IC-VWI enhances lumen depiction and reduces artifacts.
  • The technique shows promise for improved assessment of intracranial vasculopathies and aneurysms.
  • A minor reduction in wall visualization is an expected trade-off for flow suppression.