ISMRM25 - Pulse Sequences / Quantitative Imaging / Artifacts & Correction

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

Pulse Sequences / Quantitative Imaging / Artifacts & Correction

Traditional Poster

Wednesday, 14 May 2025

Building: Room: Exhibition Hall

13:30 - 14:30

Session Number: T-01

No CME/CE Credit

		5200. On the feasibility of myelin water imaging at low-field MRI using multi-echo GRASE PDF Poster G. F. Piredda, T. Yu, E. J. Canales-Rodríguez, L. Bacha, T. Di Noto, B. Maréchal, D. Nickel, T. Kober, T. Hilbert Siemens Healthineers International AG, Lausanne, Switzerland Impact: By leveraging deep learning-based reconstructions, myelin water imaging is feasible at 0.55T with a multi-component decomposition of multi-echo T₂ data acquired in approximately 6 minutes at 2.5 mm isotropic resolution, encouraging further neuroimaging research at low field strengths.
		5201. Quantification of cortical and subcortical integrity within clinically feasible scan time using a 16-Tx/64-Rx RF array PDF Poster K. Pine, P-L Bazin, E. Kirilina, N. Weiskopf Max Planck Institute for Human Cognitive and Brain Sciences, Leipzig, Germany Impact: This is an important step toward the clinical translation of ultra-high-resolution qMRI. The high sensitivity achieved in cortical and brainstem imaging makes the tested RF array a valuable tool for detecting early neurodegeneration at prodromal stages of AD and PD.
		5202. Detecting cerebral microvascular pulsation using cardiac-synchronized pCASL with segmented stack-of-star golden-angle radial bSSFP readout PDF Poster T. Zhao, L. Yan Northwestern University, Chicago, United States Impact: We developed an efficient non-invasive MRI technique for imaging cerebral microvascular pulsatility, which could provide a useful imaging tool to directly study microvascular dynamics and their role in the glymphatic system.
		5203. Quantitative synthetic MRI and 3D T1 imaging reveal structural and functional changes in hippocampal subfields in Type 2 Diabetes H. Zhou, M. Li, W. Liu Central People's Hospital of Zhanjiang, Zhanjiang, China Impact: This study demonstrates synthetic MRI’s utility in monitoring hippocampal subfields changes and cognitive decline in T2DM, providing insights into metabolic and neurovascular disruptions relevant to Alzheimer’s disease risk.
		5204. "Random" non-linear encoded MRI on standard clinical MRI systems PDF Poster F. Bschorr, T. Hüfken, T. Lobmeyer, H. Frantz, J. Schüle, T. Speidel, V. Rasche Ulm University Medical Center, Ulm, Germany Impact: This work demonstrates that the higher-order shim coils of a clinical MRI system can be utilized for first demonstrations of non-linear encoding schemes without the need of additional, mostly expensive and/or labour-intensive hardware.
		5205. Delta Histogram Analysis of Synthetic MRI for Evaluating the Grade and Cellular Proliferation of Meningioma PDF Poster Y. Li, Y. Chen, D. Lin, X. Zhou, Y. Zhao, J. Zhang, Y. Xue, L. Lin School of Medical Imaging,Fujian Medical University, FuZhou, China Impact: Delta histogram analysis of SyMRI can predict the grade and proliferative activity of meningiomas, which may facilitate the personalized treatment and prognostic assessment.
		5206. Residual Acceleration Ghost Artifacts in MP2RAGE at 7T MRI and Their Correction with BART Reconstruction PDF Poster K-J Jung, J. Tamir University of Illinois Urbana-Champaign, Urbana, United States Impact: MP2RAGE is the most popular sequence for T1-weighted imaging at 7T. The ghosting artifacts on the INV2 contrast were attributed to the parallel acceleration. Our solution may contribute to a revised reconstruction of the MP2RAGE sequence.
		5207. Sequence Description Language: Enabling Real-Time Applications in the Remote Sequence Interface for Open Innovation PDF Poster T. Kluge, C. Forman Siemens Healthineers AG, Erlangen, Germany Impact: MR sequences can be developed and immediately tested on the MR scanner, become software version independent and easily can be shared. MR systems can run new MR sequences without modification, which increases software security and safety in clinical environments.
		5208. Log Subtracted Inversion Recovery PDF Poster M. Bydder, D. Cornfeld, P. Condron, T. Melzer, E. Kwon, M. Tayebi, G. Newburn, M. Scadeng, S. Holdsworth, G. Bydder Mātai Medical Research Institute, Gisborne, New Zealand Impact: Use of the technique may allow clinicians to better visualize complex interfaces between tissues and to identify features in poorly characterized signal and partial volume mixtures.
		5209. The Gradient Switching-induced Current Field in Multi-echo Gradient Recalled Echo Sequences H. Zhong, Y. Song, J. Li East China Normal University, Shanghai, China Impact: These findings demonstrate the impact of eddy currents generated in multi-echo GRE by gradient switching on phase images, necessitating further investigation into their effects in vivo.
		5210. Increased temporal resolution of dynamic oximetry with spiral acquisition scheme PDF Poster M. Hosseini, M. Langham, F. Wehrli University of Pennsylvania, Philadelphia, United States Impact: Because of high efficiency in k-space coverage, spiral sampling is well suited for high temporal resolution dynamic oximetry. Spiral readout showed reduced motion and pulsatile flow artifacts, and the absence of phase wrapping often observed in BRISK field maps.
		5211. Removing Artifact of 3D Spiral In-Out with Accelerated Iterative Reconstruction using k-space Preconditioning PDF Poster z. zhong, Q. Liu, J. Xu United Imaging Healthcare North America, Houston, United States Impact: This advancement is expected to benefit various applications relying on the spiral in/out trajectory, such as real time imaging and functional MRI.
		5212. Motion-robust proton density fat fraction and T2* mapping in supraclavicular adipose tissue using radial stack-of-stars imaging PDF Poster J. Raspe, J. Stelter, P. Braun, M. Wu, D. Karampinos Technical University of Munich, Munich, Germany Impact: Our analysis provides evidence that choosing a radial stack-of-stars acquisition over cartesian sampling improves precision of proton density fat fraction (PDFF) and T2* mapping. This potentially improves investigation of dynamic changes in brown adipose in an activation paradigm.
		5213. High-Speed Tissue Quantification Using Spatiotemporal Attention Mechanism with Undersampling Strategy Consideration PDF Poster J. Wei, P. Wongkornchaovalit, X. Cao, Z. Zhou, Q. Ding, H. Ye, J. Zhong, H. He College of Biomedical Engineering and Instrument Science, Zhejiang University, Hangzhou, China Impact: The proposed STA-TS network significantly improves MRF accuracy and efficiency, achieving full brain coverage at 1 mm resolution in just 2.5 minutes, providing a faster and more accurate imaging solution for clinical applications.
		5214. More accurate synthetic MRI to shorten clinical protocols PDF Poster F. Xu, E. Versteeg, O. van der Heide, K. M. Nam, S. Mandija, M. Schilder, P. Robe, T. Snijders, C. A. van den Berg, A. Sbrizzi UMC Utrecht, Utrecht, Netherlands Impact: This improved synthesis approach, using an ultra-highly undersampled hybrid CS protocol, achieves more accurate contrast synthetization and enhances the potential of synthetic MRI for shorter clinical scan times.
		5215. Test-retest reliability and inter-method reproducibility of cerebral T1 mapping at 3T PDF Poster S. Wright, V. Truong, H. Sawan, J. Zhong, Y. Chen Wayne State University School of Medicine, Detroit, United States Impact: This study demonstrated an excellent test-retest agreement of the two 3D T1 mapping methods on the newly implemented 3T MRI, which lays a cornerstone for future clinical studies in Parkinson's disease and multiple sclerosis using this scanner.
		5216. Improving synthetic CT generation with enhanced registration PDF Poster P. Margain, S. Sommer, V. Ravano, A. Elwakil, T. Hilbert, C. Mourad, J. Favre, P. Omoumi Swiss BioMotion Lab, Lausanne University Hospital and University of Lausanne, Lausanne, Switzerland Impact: Bone-centered registration enhances synthetic CT generation for bone imaging, potentially advancing musculoskeletal imaging applications focused on bone pathology.
		5217. Density optimized low-discrepancy k-space trajectories for accelerated in-vivo 2D single-point imaging and chemical-shift imaging PDF Poster P. Gebhard, T. Speidel, F. Bschorr, J. Schüle, V. Rasche Ulm University Medical Center, Ulm, Germany Impact: Optimized single-point imaging sampling trajectories, leveraging quasi-random Sobol sequences and center oversampling, achieved faster acquisition and less coherent artifacts, enhancing in-vivo MRI and chemical shift imaging efficiency. This method shows strong potential for advancing 13-C imaging with hyperpolarized signals.
		5218. Whole-Brain T2 Mapping with Accelerated Stack-of-Stars Acquisition Using Unsupervised Model-Based Implicit Neural Representation Networks PDF Poster T. Xiao, B. Liu, H. She, Y. Du Shanghai Jiao Tong University, Shanghai, China Impact: A T2 quantitative sequence that accelerates scanning using radial trajectory is presented. An unsupervised deep-learning algorithm employing multi-resolution hash-encoding implicit neural representation is introduced to reconstruct T2 maps from undersampled data. This approach has potential to significantly shorten acquisition time.
		5219. Highly Accelerated Inner-volume selective 3D GRASE CEST Imaging with Temporal Random Walk Sampling – Application to a Brain Tumor Patient at 3 T H. Kim, S. Park, J. Kim, J. Chung, R. Hu, D. Feinberg, P. Sun Emory University, Atlanta, United States Impact: This technique offers a promising tool for efficient, high-resolution CEST imaging, with potential applications in clinical neuro-oncology for precise tumor assessment.

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