ISMRM25 - Pulse Sequence Design

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

Pulse Sequence Design

Oral

Acquisition & Reconstruction

Thursday, 15 May 2025

313A

08:15 - 10:15

Moderators: S Senthil Kumaran & Ryan Robison

Session Number: O-03

No CME/CE Credit

08:15		1134. Optimized Gradient Properties through Timing in K-Space (OPTIKS) View Presentation Video M. McCready, X. Cao, C. Liao, K. Setsompop, J. Pauly, A. Kerr Stanford University, Stanford, United States Impact: We develop a novel customizable gradient waveform design method (OPTIKS) capable of optimizing time-dependent properties while adhering to any specified trajectory. We apply OPTIKS to design fast-PNS limited readouts, make imaging quieter, and reduce large prolonged gradient coil vibrations.
08:27		1135. Simultaneous Imaging of the Entire Lung and Heart with Isotropic Resolution in Free-Breathing View Presentation Video Z. Ding, H. She, Y. Du Shanghai Jiao Tong University, Shanghai, China Impact: Comprehensive assessment of the structures/functions of the cardiopulmonary system and the cardiopulmonary interaction is feasible using the proposed technique in a single free-breathing scan.
08:39		1136. Deep Learning-Optimized GRASP-Pro Reconstruction for Highly-Accelerated DCE-MRI View Presentation Video H. Pei, L. Feng New York University Grossman School of Medicine, New York, United States Impact: The proposed self-supervised learning-optimized GRASP-Pro enables efficient and reliable 4D MRI reconstruction. This improves reconstruction quality for highly-accelerated 4D dynamic MRI, which is useful in various applications such as DCE-MRI.
08:51		1137. Learning Implicit Neural Representation with Explicit Physical Priors for Accelerated Quantitative $$$\text{T}_{1\rho}$$$ Mapping View Presentation Video J. Xie, Y. Liu, Y. Wang, Z-X Cui, Q. Zhu, J. Cheng, C. Li, D. Liang, Y. Zhu East China Normal University, Shanghai, China Impact: This study enables accelerated, high-quality $$$\text {T}_{1\rho}$$$ mapping, improving diagnostic efficiency and providing a foundation for future advancements in rapid quantitative imaging, with potential applications across diverse clinical and research fields.
09:03		1138. Rapid Whole Brain 180µm Mesoscale In-vivo T2w Imaging View Presentation Video J. Lyu, L. Ning, W. Consagra, Q. Liu, R. J. Rushmore, Y. Rathi Harvard Medical School, Boston, United States Impact: ROVER-MRI with multi-resolution hash encoding facilitates efficient and seamless MRI super-resolution reconstruction, achieving rapid 180µm isotropic resolution while reducing scan time. Our method offers a substantial leap in acquiring mesoscale whole-brain T2w imaging with minimal noise and motion artifacts.
09:15		1139. 3D GRASE with Long Echo Trains and Inner Volume Excitation View Presentation Video N. Kobayashi, M. Adams, P. Bolan, G. Metzger University of Minnesota, Minneapolis, United States Impact: 3D high-resolution FSE acquisitions have been accelerated by combining GRASE acquisitions, long echo trains and inner volume excitation, allowing efficient 3D k-space sampling for rapid high-resolution imaging.
09:27		1140. Novel MRI Pulse Sequence to Image Upper Airway Anatomy and Measure Changes in Neurometabolism During Volitional Model Apneas View Presentation Video J. Dennison, M. Langham, F. Wehrli University of Pennsylvania, Philadelphia, United States Impact: Identifying specific changes in neurometabolism and upper-airway architecture with an experimental paradigm validates the proposed approach before applications in a more challenging naturalistic observation. Experiments in healthy subjects also helps contextualize the magnitude of changes noted in natural observations.
09:39		1141. 3D free-breathing water-specific abdominal T1 and T2 mapping using Cartesian sampling with spiral profile ordering (CASPR) View Presentation Video J. Stelter, K. Weiss, J. Meineke, W. Zhang, B. Kainz, R. Braren, D. Karampinos Technical University of Munich, Munich, Germany Impact: Simultaneous water T1 and T2 mapping is achieved in a scan time of 5min at isotropic resolution of 3mm using a T2-prepared Look-Locker scheme with large-FOV CASPR sampling. This technique may be valuable in assessing diffuse and focal abdominal diseases.
09:51		1142. Accelerated T2-weighted imaging of water, fat and silicone with joint reconstruction and species separation. View Presentation Video A. Nurdinova, X. Zhou, J. Oscanoa, D. Abraham, B. Daniel, K. Setsompop, B. Hargreaves Stanford, Stanford, United States Impact: WFS-separated T₂-weighted imaging with multi-gradient-echo acquisition can be accelerated ~1.5x by solving jointly for parallel imaging and species separation and incoherently undersampling in the ky-TE domain.
10:03		1143. Accelerated DESPOT1 with variable parameters for 3D T1 brain mapping View Presentation Video R. Coronado, C. Besa, R. Botnar, P. Irarrazaval, C. Prieto School of Engineering, Pontificia Universidad Católica de Chile, Santiago, Chile Impact: By using variable TRs, FAs, and BWs with dictionary-based reconstruction, this research improves DESPOT1 adaptability and speed, reducing scan time by 40% for 3D in-vivo T1 brain mapping and promising broader applications in research and clinical settings.

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