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. Author manuscript; available in PMC: 2020 Oct 1.
Published in final edited form as: IEEE Trans Med Imaging. 2019 Feb 11;38(10):2389–2399. doi: 10.1109/TMI.2019.2898202

Fig. 9. Experimental resolution and signal bandwidth relationships.

Fig. 9.

(a) PSFs constructed from the same dataset but using only 1 (red) or 15 (blue) harmonics of the fundamental square wave excitation frequency in reconstruction. (b) PSF FWHM resolution as a function of the number of harmonics used in reconstruction. (c) Peak signal intensity as a function of the number of harmonics used in reconstruction. Unlike in continuous wave MPI, resolution worsens with increasing receive bandwidth and the inclusion of more harmonics. Peak signal does, however, improve. This interesting resolution-bandwidth relationship is a function of the temporo-spatial encoding of the signal due to the field dependence of tracer magnetic relaxation.