Abstract #1017

T1-weighted two-point fat/water separated PROPELLER acquired with dual bandwidths

Henric Rydén¹, Johan Berglund^2,3, Enrico Avventi^1,4, Ola Norbeck^1,4, and Stefan Skare^1,4

¹Neuroradiology, Karolinska University Hospital, Stockholm, Sweden, ²Department of Clinical Science, Intervention and Technology, Karolinska Institutet, Stockholm, Sweden, ³Department of Medical Radiation Physics, Karolinska University Hospital, Stockholm, Sweden, ⁴Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden

A PROPELLER sequence with dual bandwidths was developed for T1-weighted fat/water separated imaging. The bandwidth of the second readout was adjusted to remove dead time related to shifted readouts in order to improve SNR efficiency. Before PROPELLER reconstruction, bladewise fat/water separation was performed in k-space to remove chemical shift displacement artifacts. This enabled low bandwidth acquisitions without smearing of the fat signal, which further improved SNR efficiency. Strong fat suppression insensitive to B0 inhomogeneity was demonstrated in imaging of the neck and orbits.

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