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Joint Multicontrast MRI Reconstruction

Weizman, L; De Castro Mota, JF; Song, P; Eldar, YC; Rodrigues, MRD; (2017) Joint Multicontrast MRI Reconstruction. In: Proceedings of the 2017 Signal Processing with Adaptive Sparse Structured Representations Workshop: SPARS 2017. Signal Processing with Adaptive Sparse Structured Representations (SPARS) workshop: Lisbon, Portugal. Green open access

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Abstract

Joint reconstruction is relevant for a variety of medical imaging applications, where multiple images are acquired in parallel or within a single scanning procedure. Examples include joint reconstruction of different medical imaging modalities (e.g. CT and PET) and various MRI applications (e.g. different MR imaging contrasts of the same patient). In this paper we present an approach for joint reconstruction of two MR images, based on partial sampling of both. We assume each MR image has a limited number of edges, that is, low total variation, but they are similar in the sense that many of the edges overlap. We examine synthetic phantoms representing T1 and T2 imaging contrasts and realistic T1-weighted and T2-weighted images of the same patient. We show that our joint reconstruction approach outperforms conventional TV-based MRI reconstruction for each image solely. Results are shown both visually and numerically for sampling ratios of 4%-20%, and consist of an improvement of up to 3.6dB.

Type: Proceedings paper
Title: Joint Multicontrast MRI Reconstruction
Event: 2017 Signal Processing with Adaptive Sparse Structured Representations (SPARS) Workshop
Open access status: An open access version is available from UCL Discovery
Publisher version: http://spars2017.lx.it.pt/index_files/papers/SPARS...
Language: English
Additional information: This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions.
UCL classification: UCL
UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng
URI: https://discovery.ucl.ac.uk/id/eprint/10061955
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