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. Author manuscript; available in PMC: 2019 Jan 1.
Published in final edited form as: Methods Mol Biol. 2018;1700:83–96. doi: 10.1007/978-1-4939-7454-2_6

Figure 3.

Figure 3

Optimization of the 1H 90° pulse on the water peak. (A) Nutation curve by varying the pulse length at a fixed B1 amplitude to determine an accurate 360° pulse. (B) Fine tune calibration of the 360° pulse by setting the pulse length to four times the desired 90° pulse and increasing the power level from left to right. The null value corresponds to the 360° pulse.