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  Improving DESS contrast in 7T hip images using L1-norm denoising and optimal echo combination

Destruel, A., Li, M., Engstrom, C., Weber, E., Jin, J., Heule, R., et al. (2020). Improving DESS contrast in 7T hip images using L1-norm denoising and optimal echo combination. Poster presented at 2020 ISMRM & SMRT Virtual Conference & Exhibition.

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Destruel, A, Author
Li, M, Author
Engstrom, C, Author
Weber, E, Author
Jin, J, Author
Heule, R1, 2, Author              
Bieri, O, Author
Liu, F, Author
Crozier, F, Author
Affiliations:
1Department High-Field Magnetic Resonance, Max Planck Institute for Biological Cybernetics, Max Planck Society, ou_1497796              
2Max Planck Institute for Biological Cybernetics, Max Planck Society, Spemannstrasse 38, 72076 Tübingen, DE, ou_1497794              

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 Abstract: The double-echo steady-state (DESS) sequence has been used successfully in 3T MRI imaging of the musculoskeletal system for segmentation of joint. However, in 3D-DESS images acquired at 7T MRI, a reduction in the contrast between tissues due to an increased diffusion sensitivity may complicate cartilage segmentation. Typically, the signals acquired with DESS are averaged without any pre-processing. However, these signals give different contrasts and have different noise behaviours. In this work, we improve the contrast-to-noise ratio (CNR) whilst preserving anatomical detail in high-resolution 7T DESS images through a new approach combining L1-norm denoising and p-norm combination of the echo signals.

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 Dates: 2020-08
 Publication Status: Published online
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Title: 2020 ISMRM & SMRT Virtual Conference & Exhibition
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Start-/End Date: 2020-08-08 - 2020-08-14

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Title: 2020 ISMRM & SMRT Virtual Conference & Exhibition
Source Genre: Proceedings
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Pages: - Volume / Issue: - Sequence Number: 2746 Start / End Page: - Identifier: -