ISMRM25 - Physics & Engineering: Low to High Field

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

Physics & Engineering: Low to High Field

Digital Poster

Physics & Engineering

Thursday, 15 May 2025

Exhibition Hall

08:15 - 09:15

Session Number: D-204

No CME/CE Credit

		Computer Number: 113 4238. Optimizing the white matter/grey matter contrast on a portable 46 mT MRI scanner View Presentation Video B. Lena, C. Najac, T. O'Reilly, R. van den Broek, A. Webb Leids Universitair Medisch Centrum, Leiden, Netherlands Impact: This study demonstrates that a T1-weighted sequence with optimized inversion time effectively enhances grey-to-white matter contrast in low-field MRI, offering reliable tissue differentiation for different subjects and resolutions.
		Computer Number: 114 4239. A fluid-sensitive MRI protocol for the small joints of the hand using a portable 46 mT scanner View Presentation Video B. Lena, J. Parsa, S. van Griethuysen, D. Ton, Y. Dong, A. van der Helm -van Mil, A. Webb Leids Universitair Medisch Centrum, Leiden, Netherlands Impact: In this study, we developed a fluid-sensitive MRI protocol for a portable 46 mT system. This method allows to capture both anatomical structures and fluid details, while ensuring comfortable scanning, showing potential for affordable, accessible joint inflammation detection.
		Computer Number: 115 4240. Electromagnetic Interference Removal in Low-Field MRI via EDITER, Structured Low-Rank Modeling, and Denoising Diffusion Model View Presentation Video G. S. Jhun, H. J. Yook, J. H. Cho, S. Srinivas, C. Cooley, B. Bilgic, T. H. Kim Hongik University, Seoul, Korea, Republic of Impact: We propose a novel framework for enhanced low-field MRI by integrating LORAKS and DDNM into EDITER, which effectively eliminates electromagnetic interference (EMI) and improves SNR. The proposed method substantially improves low-field MRI, overcoming limitations of existing methods.
		Computer Number: 116 4241. Signal distortion characterization and correction using pilot chirp pulse train for free-running clock synchronization View Presentation Video W. Lee, D. Abraham, S. Vasanawala, J. Pauly, S. Greig Stanford University, Stanford, United States Impact: Pilot chirp can improve the usability of tracking and correcting offset distortions associated with asynchronous free-running receivers.
		Computer Number: 117 4242. Ultra-low-field Abdominal MRI Using Pineapple Juice as Oral Contrast Agent: A Preliminary Study View Presentation Video Y. Zhao, S. Su, Y. Ding, J. Zhang, X. Lin, J. Hu, A. T. L. Leong, E. X. Wu The University of Hong Kong, Hong Kong, China Impact: We evaluate the initial feasibility of using pineapple juice as a natural oral contrast agent for 0.05T abdominal MRI. The developments can advance ultra-low-field abdominal MRI, potentially offering a more accessible, cost-effective and patient-friendly approach to address numerous clinical needs.
		Computer Number: 118 4243. A 50 mT portable MRI scanner for breast imaging: proof-of-concept imaging implementation View Presentation Video Z. Wu, X. Hu, X. Jiang, Z. Ni, H. Yi, R. Lu Southeast University, Nanjing, China Impact: The constructed 50 mT portable breast MRI prototype has the potential to be used in early screening of breast disease in the future.
		Computer Number: 119 4244. Improving Preamp Decoupling Accuracy in Multi-Channel MRI Coils: A Comparison of Measurement Techniques View Presentation Video M. Shrestha, M. Mahmutovic, S-L Hansen, A. Ghotra, B. Keil TH Mittelhessen - University of Applied Sciences, Giessen, Germany Impact: Direct impedance measurement for preamplifier decoupling provides a more accurate method than traditional techniques, reducing coil coupling, improving signal quality and enabling further developments in multi-channel MRI coil design for high-resolution, parallel imaging.
		Computer Number: 120 4245. In-Bore, Non-Magnetic Detection of Stretchable Coils’ Resonance Frequency View Presentation Video F. Narongrit, T. Ramesh, J. Rispoli Purdue University, West Lafayette, United States Impact: This resonance detection system enables in-bore, adaptable frequency monitoring and retuning for flexible MRI coils without ferromagnetic components. It facilitates future wireless, multi-coil, and multi-nuclei applications, reducing equipment limitations and improving coil performance in high-field MRI environments.
		Computer Number: 121 4246. Design and evaluation of multimodal concentric surface coils for 3T MR imaging View Presentation Video Y. Zhao, A. Bhosale, X. Zhang State University of New York at Buffalo, Buffalo, United States Impact: The proposed multimodal concentric coil demonstrates superior B1 field efficiency and reduced SAR compared to conventional surface coils. These improvements can significantly enhance image quality and patient safety in 3T MRI, paving the way for better clinical outcomes.
		Computer Number: 122 4247. Improved thoracic outlet syndrome MRI assessment with a modular flexible coil at 3 T View Presentation Video L. Nohava, B. Assabah, R. Gillet, G. Drouot, E. Laistler, J. Felblinger, K. Isaieva High Field MR Center, Center for Medical Physics and Biomedical Engineering, Medical University of Vienna, Vienna, Austria Impact: A novel modular flexible coil significantly improves MRI imaging for thoracic outlet syndrome, enhancing SNR and patient comfort. This proof-of-concept study promises more accurate diagnoses and shorter exam times, potentially improving clinical practice for TOS assessment.
		Computer Number: 123 4248. Concentric-loops coil reducing imaging noise and enhancing imaging SNR compared to traditional single-loop coil View Presentation Video X. Li, X-H Zhu, W. Chen University of Minnesota, Minneapolis, United States Impact: This simple novel coil can be optimized and adapted for a broad range of MRS and MRI imaging applications with largely reduced imaging noise, improved coil sensitivity and approximately doubled imaging SNR as compared to the traditional single-loop coil.
		Computer Number: 124 4249. Embedding Dynamic Field Probes in 7T RF Array Coils Enables Concurrent Field Monitoring Without Degrading Coil Performance View Presentation Video S. Williams, C. Mirkes, P. McElhinney, B. Ding, S. Gross, K. Pine, R. Müller, N. Weiskopf, H. Möller, S. Gunamony University of Glasgow, Glasgow, United Kingdom Impact: Incorporating dynamic field probes in parallel-transmit RF coils with high receive channel counts can help mitigate increased B₁⁺ and B₀ at ultra-high fields. We explore the effects on RF coils with integrated probes by evaluating performance with and without probes.
		Computer Number: 125 4250. Characterization of Coaxial-End Dipoles and Comparison with Meander Stripline-Elements for Prostate Imaging at 7T View Presentation Video C. Stevens, O. Kraff, G. Solomakha, K. Scheffler, N. Avdievich, H. Quick, M. May Department of Physical Engineering, Westphalian University of Applied Sciences, Gelsenkirchen, Germany Impact: The coaxial-end dipole array demonstrated superior transmission efficiency over meander stripline elements. Due to the higher channel count increases in SNR and receive performance are possible. However, the dipoles were more sensitive to loading than meander stripline elements.
		Computer Number: 126 4251. Simulation of the RF Shimming Performance of 8 Channel Arrays for 7T Head-Imaging with a Large Diameter Transmit Coil View Presentation Video M. J. Hubmann, R. Kowal, S. Orzada, O. Speck, H. Maune Otto-von-Guericke University, Magdeburg, Germany Impact: This work demonstrates the potential of different large diameter Tx coil arrays and should help other researchers who want to build a large diameter Tx coil to decide on a suitable coil type.
		Computer Number: 127 4252. Higher Fields, Deeper Insights: DL-based $$$B_{1}^{+}$$$ prediction at 10.5T View Presentation Video K. Hadjikiriakos, F. Zimmermann, F. Krüger, C. Aigner, M. Marjanska, S. Schmidt, Y. W. Park, G. J. Metzger, S. Schmitter Physikalisch-Technische Bundesanstalt (PTB), Braunschweig and Berlin, Germany Impact: The study suggests that training a neural network to predict $$$B_{1}^{+}$$$-maps for a 16Tx/80Rx head coil at 10.5T might not require all coil elements, highlighting methods to identify redundant elements to optimize training speed and specific applications.
		Computer Number: 128 4253. Joint design of a 90° - 180° spokes pulse in pTX for 2D TSE imaging at 11.7 Tesla View Presentation Video J. Brégeat, A. Massire, N. Boulant, V. Gras, F. Mauconduit Paris-Saclay University, CEA, CNRS, BAOBAB, NeuroSpin, Gif-sur-Yvette, France Impact: The joint design appears to be a promising strategy, enabling the generation of excitation and refocusing pulses while enforcing the respect of CPMG condition. This is a key step toward enabling 2D TSE sequences at ultra-high fields.

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