ISMRM25 - Data Acquisition, New Trajectories & Spatial Encoding Methods

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

Data Acquisition, New Trajectories & Spatial Encoding Methods

Digital Poster

Acquisition & Reconstruction

Wednesday, 14 May 2025

Exhibition Hall

09:15 - 10:15

Session Number: D-07

No CME/CE Credit

		Computer Number: 1 3344. K-space Guided Under-sampling Pattern Optimization for Implicit Neural Representation-based Reconstruction M. Chen, H. Wei Shanghai Jiao Tong University, Shanghai, China Impact: This study significantly improves MRI reconstruction quality by optimizing under-sampling patterns, potentially leading to more accurate clinical diagnoses. It opens avenues for further research on the adaptability of the under-sampling patterns in various clinical contexts, ultimately enhancing patient outcomes.
		Computer Number: 2 3345. Accelerating CEST MRI: A comparative study of multi-shot 3DFSE techniques for improved scan efficiency View Presentation Video C. Dhakan, M. Mitsuharu, B. Burns, A. Smith, W. Tetsuya, M. D. Pagel, M. C. Veronesi University of Wisconsin-Madison, Madison, United States Impact: This study enables faster, more accessible CEST MRI with clinically viable multi-shot-3DFSE protocols, allowing reduced motion sensitivity and enhanced efficiency. These findings may inspire further exploration of accelerated imaging techniques, benefiting both clinical diagnostics and future CEST research applications.
		Computer Number: 3 3346. Precision neuroimaging and connectomics: individual human brain at ultra-high fields View Presentation Video D. G. Cabalo, I. R. Leppert, R. Thevakumaran, S. Tavakol, J. Royer, J. DeKraker, Y. Hwang, V. Kebets, Y. Wang, O. Benkarim, N. Eichert, C. Paquola, S. Valk, J. Smallwood, C. Tardif, D. Rudko, R. Rodriguez-Cruces, B. Bernhardt Montreal Neurological Institute, McGill University, Montreal, Canada Impact: Our PNI dataset offers openly accessible, ultra-high resolution 7T MRI data across multiple sessions, enabling researchers to explore structure-function relationships in the brain with unprecedented detail and supporting reproducible neuroscience research.
		Computer Number: 4 3347. Structural and Functional Looping Star MR Neuroimaging at 7T View Presentation Video F. Wiesinger, M. Lancione, B. Fernandez, A. B. Solana, P. Cecchi, L. Biagi, M. Cencini, T. Loboy Ramos, M. Menzel, G. Donatelli, R. Guerrini, M. Tosetti GE HealthCare, Munich, Germany Impact: Looping Star is an innovative, new MR method for 7T neuroimaging, offering silent, 3D whole-brain multi-GRE imaging. It enables new structural and functional investigations in a quieter, more comfortable environment, ideal for advanced neuroscientific research and hyperacusis patients.
		Computer Number: 5 3348. Conical readouts for bSSFP at 0.55T View Presentation Video M. Nicoletti, S. Rapacchi, M. Stuber, C. Tous Lausanne University Hospital (CHUV), Lausanne, Switzerland Impact: The 3D Cones trajectory improves sampling efficiency and image sharpness in low-field MR imaging, offering a more effective alternative to Cartesian and radial methods. This advancement enables high-resolution imaging applications, enhancing clinical utility and expanding patient access to diagnostic imaging.
		Computer Number: 6 3349. Quadruple-refocused spin-locking: a robust method for high amplitude T1ρ imaging View Presentation Video C. Wan, M. Gram, W. He, Z. Xu, Q. Chen, S. Littin, T. Lange, M. Zaitsev Chongqing University, Chongqing, China Impact: With quadruple-refocusing, high amplitude spin-locking can be improved in the compensation of field inhomogeneities. The presented method has potential application in the T_1ρ quantification in low-field MRI.
		Computer Number: 7 3350. Quantitative MRI Mapping of Upper Airway Anatomy and Cerebral Oxygen Metabolism with Concurrent EEG in OSA Patients During Sleep in Scanner View Presentation Video J. Dennison, A. Wiemken, M. Langham, J. Xu, R. Schwab, F. Wehrli University of Pennsylvania, Marlton, United States Impact: Seeing how the upper airway becomes obstructed during sleep may be valuable for surgical treatment planning. Further, identification of the neurometabolic consequences of OSA can enhance our basic understanding of neuro-and cardiovascular risk.
		Computer Number: 8 3351. Ellipsoidal Cartesian K-space Sampling with Variable Readout Duration for 3D MRI Acceleration View Presentation Video H. Hong, Z. Zhou, P. Hu ShanghaiTech University, Shanghai, China Impact: Ellipsoidal sampling strikes a balance between efficiency and simplicity. It is compatible with other acceleration methods that subsample the phase encodings and provides a new insight for acceleration along the readout direction.
		Computer Number: 9 3352. Optimally Weighted Average (OWA) of Phase-Sensitive Data View Presentation Video Y. Dong, Q-S Xiang, M. Hoff University of Washington, Seattle, United States Impact: OWA data combination significantly enhances phase-preserving MRI reconstructions by minimizing artifacts and noise, outperforming the complex sum method. This technique promises improved diagnostic accuracy and image quality, beneficial for clinical applications where phase-sensitive data reconstruction is crucial.
		Computer Number: 10 3353. Comparison of gradient delay measurement and correction in diffusion-weighted 3D cones imaging in the breast View Presentation Video J. Zimmermann, X. Zhou, C. Moran, K. Jordanova, B. Daniel, B. Hargreaves Stanford University, Stanford, United States Impact: In non-cartesian readouts, gradient delays cause artifacts. For diffusion-weighted breast MRI with a 3D cones trajectory, we show that retrospective delay correction based on in-vivo measurements requires further development to be considered a robust method.
		Computer Number: 11 3354. Bandlimited waveform designs: improving gradient waveform fidelity and controlling acoustic response View Presentation Video A. Curtis, C. Harris, C. Anand Synaptive Medical, Toronto, Canada Impact: Short, high slew rate gradient waveforms improve scan efficiency but are loud and not fully realizable due to their frequency content. We propose a simple optimization problem for designing periodic waveforms like EPI trains, ensuring bandlimited waveforms with good fidelity.
		Computer Number: 12 3355. Stretched Radial Trajectory Design for Improved K-space Coverage and Effective Image Resolution View Presentation Video L. S. Gong, X. Cao, Z. Zhou, C. Liao, Q. Li, Y. Yang, K. Setsompop University of California, Irvine, Irvine, United States Impact: The stretched radial trajectory enables sharper MRI imaging without longer scan times, benefiting clinicians with improved diagnostic detail, and requires minimal efforts to implement. This innovation enhances imaging in low-performance MRI systems, potentially extending advanced diagnostics to underserved regions.
		Computer Number: 13 3356. A Rapid Spiral-based Oracle Scout sequence with integrated field measurements View Presentation Video J. Pipe, G. Krishnamoorthy University of Wisconsin Madison, Madison, United States Impact: An integrated B0 map with the scout scan allows one to invest substantial time in collecting the map without greatly impacting exam time. This will enable rapid, high resolution spiral-based scanning for high SNR, high resolution clinical MRI.
		Computer Number: 14 3357. Optimal k-space under sampling parttern in iterative recounstruction for radial fast spin echo MRI based on point spread function evaluation View Presentation Video S. Yokosawa, K. Oka, T. Shirai, Y. Soutome FUJIFILM Corporation, Tokyo, Japan Impact: Improving acquisition speed in radial fast spin echo MRI with optimized k-space under sampling pattern and iterative reconstruction may enhance examination throughput and reduce patient burden while maintaining or enhancing image quality.
		Computer Number: 15 3358. Sequential multi-slice imaging strategy using field-cycling View Presentation Video F. Parra, Y. Ha, A. Samardzija, H. Sun, C. Sun, R. Gross, T. Nixon, G. Galiana, T. Constable Yale University, New Haven, United States Impact: Image quality and scan time are prevalent concerns with low-field systems. Multi-slice imaging is a powerful tool to reduce scan time without compromising SNR or necessitating additional hardware.
		Computer Number: 16 3359. Multi-echo Rational Golden Angle Propeller Sampling for T1-T2-T2-FF Cardiac MR Multitasking View Presentation Video L. Ma, H-L Lee, D. Li, G. Roditi, A. Radjenovic, A. Christodoulou David Geffen School of Medicine at UCLA, Los Angeles, United States Impact:* Rational golden-angle propeller sampling efficiently covers multi-echo k-t space data and offers a foundation to further improve imaging efficiency

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