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. Author manuscript; available in PMC: 2019 Jan 1.
Published in final edited form as: Magn Reson Med. 2017 Mar 31;79(1):31–40. doi: 10.1002/mrm.26683

Figure 4.

Figure 4

Patient-tailored spatial subpulse design flowchart. With a patient-dependent B1+ map and a pre-emphasized spiral in-out trajectory, the system matrix A is constructed and its RF power-regularized pseudo-inverse A is calculated. An iterative magnitude-least-squares optimization is then performed, which interleaves RF pulse calculation with phase relaxation.