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MRI sequence analysis with phase distribution graphs

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Zaiss,  M       
Department High-Field Magnetic Resonance, Max Planck Institute for Biological Cybernetics, Max Planck Society;

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Citation

Endres, J., Dang, H., Weinmüller, S., & Zaiss, M. (2023). MRI sequence analysis with phase distribution graphs. Poster presented at 39th Annual Scientific Meeting of the European Society for Magnetic Resonance in Medicine and Biology (ESMRMB 2023) Online.


Cite as: https://hdl.handle.net/21.11116/0000-000D-D7A8-3
Abstract
Introduction: Extended Phase Graphs 1 (EPGs) are often cited as a valuable tool for sequence analysis, as they can explain the different magnetization pathways leading to various kinds of echoes. Previ- ously, we modified the phase graph formalism in the form of Phase Distribution Graphs 2 (PDGs), enabling the exact analytical calcula- tion of measured ADC signal at any point during the sequence. With this novel tool, new techniques for sequence analysis are possible, allowing to easily answer questions along the lines of ‘‘Is TrueFISP a gradient-echo or a spin-echo sequence? 3 ’’ and to visualize the echo path origins of measured signals or artifacts. In the following, we demonstrate these two applications as an example of the multitude of capabilities of PDG simulation.