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Abstract #3073

A simple approach to control rms(B1) by pulse length in variable flip angle (VFA) T1 mapping of human brain

Gunther Helms1
1Medical Radiation Physics, Clinical Sciences Lund, Lund University, Lund, Sweden

Controlling the saturation of bound magnetization in variable flip angle (VFA) experiments improves the derived parameter maps. Instead of using special CSMT RF pulses, we kept the rmsB1 constant simply by increasing the RF pulse duration with the square of the flip angle. At 3T, VFA T1 mapping of human brain thus showed better compliance to the Ernst equation than at constant pulse duration or B1 amplitude, but yielded shorter T1.

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