Abstract #0535

New post-processing methods for simultaneous measurement of R2, R2', R2*, QSM, positive and negative susceptibility maps using mGESFIDE acquisition

Dongmyung Shin¹, Se-Hong Oh², Doohee Lee¹, Jingu Lee¹, and Jongho Lee¹

¹Department of electrical and computer engineering, Seoul National University, Seoul, Republic of Korea, ²Department of Biomedical Engineering, Hankuk University of Foreign Studies, Gyeonggi-do, Republic of Korea

In this work, we demonstrated that a modified gradient-echo sampling of FID and echo (mGESFIDE) sequence was able to produce multiple contrast images (R₂, R₂', R₂*, local field map, QSM, positive and negative susceptibility maps) in 5 minutes of scan time. We developed a new algorithm for improved R₂ and R₂' maps by considering RF slice profiles in the excitation and refocusing RF pulses. Additionally, we developed a new method that generated a high-quality local field map by utilizing all echoes of mGESFIDE.

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