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. Author manuscript; available in PMC: 2021 Jul 28.
Published in final edited form as: Neuroimage. 2018 Nov 19;186:464–475. doi: 10.1016/j.neuroimage.2018.11.023

Fig. 3. Multi-contrast PD maps estimated using data acquired with the 20 and 64 channel (ch) receiver coils using different numbers of N4ITK iterations for RP removal.

Fig. 3

(a) Example of multi-contrast PD map estimated using data acquired with 20 channel coil. Each row displays the PD map corrected for RP sensitivity using a different number of N4ITK consecutive iterations (one to ten). (b) PD changes between different numbers of N4ITK iterations for the 20 channel dataset. Each row displays the spatial changes between consecutive numbers of iterations. (c) Example of multi-contrast PD map estimated using data acquired with 64 channel coil and different number of N4ITK iterations. (d) PD changes between different numbers of consecutive N4ITK iterations for the 64 channel dataset. (e) Difference between the multi-contrast PD maps acquired with the 20 and 64 channel coils for each number of N4ITK iterations used for the RP removal. (f) Root mean square (RMS) of the PD changes between different numbers of consecutive N4ITK iterations for the 20 channel coil data in three healthy subjects. (g) RMS of the PD changes between different numbers of consecutive N4ITK iterations for the 64 channel coil data of three healthy subjects. (h) RMS of the PD changes between the 20 channel coil dataset and the 64 channel coil one for each iteration of N4ITK in three healthy subjects.