K. A. Danishad1,
Niravkumar Darji1, Oliver Speck1
1Department of Biomedical
Magnetic Resonance, Otto-von-Guericke University, Magdeburg, Saxony Anhalt,
High RF power deposition caused by multiple 1800 refocusing pulses is a major limitation of TSE sequences in ultra high field MR imaging. In this study, the flip angle variation of the hyper-TSE sequence was optimized to further reduce SAR. T2-contrast and image artifacts of the modified hyper-TSE sequence were compared with standard TSE and hyper-TSE sequences. Our results indicate that the hyper-TSE sequence with further reduced FA can be used in high-field systems without compromising the T2-contrast and SNR and with the benefit of increased coverage or reduced SAR.