Reduced specific absorption rate (SAR) Magnetization Transfer imaging with Low Density MT pulse technique for 7 Tesla

Due to the much higher specific absorption rate (SAR) of tissue at ultra-high field (UHF), the acquisition time of MT imaging at UHF is much longer than at lower filed strengths. Thus, MT imaging at UHF MRI has not, heretofore been suitable for clinical scanning. In this work, we described a new MT acquisition technique within a clinically reasonable time (<6 min) which uses a sparsely applied MT pulse. With new proposed MT acquisition scheme, the scan time is reduced considerably while maintaining similar MTR when compared with the case of conventional MT.

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