ISMRM25 - Artifacts & Correction: Motion & Acquisition

ISMRM & ISMRT Annual Meeting & Exhibition • 10-15 May 2025 • Honolulu, Hawai'i

Artifacts & Correction: Motion & Acquisition

Oral

Acquisition & Reconstruction

Tuesday, 13 May 2025

312

15:45 - 17:45

Moderators: Adam Bush & Filiz Yetisir

Session Number: O-01

No CME/CE Credit

15:45		0635. Polar Angles Randomisation Overcomes Binning-Introduced Artefacts in 3D Radial Phyllotaxis GRE View Presentation Video M. Leidi, E. Peper, J. Délitroz, J-B Ledoux, L. Romanin, J. Bastiaansen, J. Schneider, B. Franceschiello HES-SO, Sion, Switzerland Impact: The flexyPhy trajectory improves 3D spiral phyllotaxis by enhancing sampling uniformity, binning flexibility, and image quality. It has potential to improve motion estimation in sequential binning applications, such as fMRI, and boost uniformity in motion-resolved techniques like cardiac MRI.
15:57		0636. Evaluation of 3D Radial Phyllotaxis Trajectories for Artifact-Free Imaging and Parametric Mapping View Presentation Video E. Peper, G. Bauman, B. Açikgöz, N. Plähn, A. Mackowiak, Y. Safarkhanlo, D. Piccini, L. Feng, C. Roy, O. Bieri, J. Bastiaansen Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland Impact: The proposed 3D radial phyllotaxis trajectory designs reduce artifacts and improve T1,T2 mapping accuracy, enhancing image quality for researchers using 3D radial imaging across MRI sequences, including bSSFP. These designs enable accurate radial imaging in both research and clinical applications.
16:09		0637. Optimization of free-breathing spiral cardiac cine imaging at 3T with variable flip angle scheme and region-optimized virtual coils (ROVir) View Presentation Video K. Yan, Q. Dou, Z. Wang, X. Feng, C. Meyer University of Virginia, Charlottesville, United States Impact: Reduced image contrast, along with interference artifacts can restrict the clinical use of free-breathing spiral cardiac cine imaging at 3T. The optimizations presented here offer significant potential to broaden the clinical applicability of this technique at 3T.
16:21		0639. MR-Eye: A High-Resolution Motion-Resolved MRI Protocol for Anatomical Imaging of the Human Eye View Presentation Video Y. Jia, B. Milani, O. Esteban, E. Fornari, J-B Ledoux, H. Vitali, J. Bastiaansen, B. Franceschiello Institute of Systems Engineering, School of Engineering, HES-SO Valais-Wallis, Sion, Switzerland Impact: Current MRI protocols for diagnosing orbital inflammation and tumors are prone to motion artifacts. Our motion-resolved protocol enhances structural detail and image quality in terms of quantitative metrics, advancing MRI’s diagnostic capabilities in ophthalmology.
16:33		0638. Correcting motion-related B0 Inhomogeneities via Combined Spherical Harmonics and AC/DC Matrix Coils Using AI-based Prediction View Presentation Video M. Khosravi, B. Bachrata, W. Bogner, B. Strasser, J. Stockmann, G. Grabner, S. Motyka Department of Medical Engineering, Carinthia University of Applied Sciences, Klagenfurt, Austria Impact: Dynamic shimming with spherical harmonics and AC/DC matrix coils based on AI-prediction of motion-related B0 inhomogeneities is shown feasible. This offers a promising approach for dynamic shimming that could potentially replace volumetric navigators while maintaining motion-related B0 stability.
16:45		0640. Distortion Correction in TSE Near Metal Implants at 0.55T Using Model-Based Iterative Reconstruction and Opposite Readout Acquisitions View Presentation Video B. Li, N. Lee, K. Keskin, D. Yoon, A. Toews, J. Acharya, J. Gross, B. Hargreaves, K. Nayak University of Southern California, Los Angeles, United States Impact: This method enhances SNR without blurring for MRI near metal implants at 0.55T, benefiting low-SNR regions such as the spine and disc, while avoiding the prolonged scan times associated with VAT methods that require multiple averages for SNR improvement.
16:57		0641. An Efficient Signal Averaging with Model-Based Reconstruction for Meso-scale Resolution T2W GRE-EPI at 7T with High-Performance Gradients View Presentation Video U. Yarach, S. Akrasirakul, F. Godenschweger, H. Mattern, Y-H Tung, O. Speck Chiang Mai University, Chiang Mai, Thailand Impact:* This advanced imaging technique enables rapid, ultra-high-resolution brain scans with reduced artifacts, enhancing structural detail and diagnostic quality. It provides a promising alternative to conventional methods, potentially advancing clinical neuroimaging and expanding applications of 7T MRI in research.
17:09		0642. Towards Fast and Motion-Robust Foot and Knee MRI: Application of SAMER Retrospective Motion Correction with Deep Learning for 2D TSE and 3D SPACE View Presentation Video D. Polak, E. Raithel, R. Andujar Lugo, A. Fischer, D. N. Splitthoff, B. Clifford, E. Gabler, W-C Lo, L. L. Wald, S. Cauley Siemens Healthineers AG, Forchheim, Germany Impact: SAMER retrospective motion correction was applied to knee and foot imaging and integrated with a deep learning reconstruction to facilitate fast and motion-robust 2D and 3D MSK imaging. This could enhance clinical diagnostics and improve patient outcomes in musculoskeletal MRI.
17:21		0643. Head Motion Sensing and Estimation in 3D Radial MRI using Region-Optimized Virtual Coil View Presentation Video E. Lin, F. Calakli, S. Warfiled Computational Radiology Laboratory, Bostion Children's Hospital, Harvard Medical School, Boston, United States Impact: This research offers a groundbreaking approach to high-temporal motion sensing in MRI, enhancing image quality through accurate position estimation. It opens avenues for future investigations into motion compensation techniques, ultimately benefiting clinical applications in brain imaging and diagnostics.
17:33		0644. Markerless prospective motion correction assisted functional MRS during motor activation using PRESS sequence at 3T View Presentation Video Y. Liu, Y. Wei, Y. Yang, X. Zhang, J. Zhao, P. Lee, A. Tal, H. Chen, Z. Zhang Shanghai Jiao Tong University, Shanghai, China Impact: With the assistance of a markerless prospective motion correction system, fMRS at 3T with a clinically feasible protocol is capable of detecting small changes of a few percent in Glx concentrations during functional activation.

Similar Session(s)