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. Author manuscript; available in PMC: 2017 Dec 11.
Published in final edited form as: Int J Radiat Oncol Biol Phys. 2016 Dec 14;97(4):849–857. doi: 10.1016/j.ijrobp.2016.11.053

Fig. 1.

Fig. 1

Schematic flow of the proposed unifying multi-atlas approach for estimating electron density based on anatomic magnetic resonance (MR) imaging. Abbreviations: CT = computed tomography; Def. MR = deformed MR; D.I.R. = deformable image registration; MAP = maximum a posteriori; PDF = probability density function; SOS = sum of square; [T] = transformation matrix.