Abstract #3554

Correction of transmit-field induced signal inhomogeneity in 3D MP-FLAIR at 7T

Jan Ole Pedersen¹, Vincent O. Boer², Oula Puonti², Jaco M. Zwanenburg³, and Esben Thade Petersen^2,4

¹Philips Healthcare, Copenhagen, Denmark, ²Danish Research Centre for Magnetic Resonance, Centre for Functional and Diagnostic Imaging and Research, Copenhagen University Hospital, Hvidovre, Denmark, ³Department of Radiology, University Medical Center Utrecht, Utrcecht, Netherlands, ⁴Section for Magnetic Resonance, DTU Health Tech, Technical University of Denmark, Kgs Lyngby, Denmark

In order to ease radiological assessment of 7T MP-FLAIR images, we have developed a fully automated bias-field correction that reduces apparent signal loss caused by inhomogeneities in the RF transmit field. Using simulations and measurements of the transmit field, the bias-field can be corrected for without relying on the simplifying assumptions used in a typical bias-field correction. The algorithm is expandable to other TSE-based sequences and adds limited additional scan time.

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