Quantitative Susceptibility Mapping (QSM)
Introduction
Quantitative susceptibility mapping takes a set of gradient-echo images acquired at different echo times, and through a series of intermediate steps, estimates a map (image) of magnetic susceptibility.
The input image(s) must contain complex pixel intensities (i.e. each point in the image has a real value and an imaginary value). The complex components may be contained in separate image slices, or the image may of data type Complex, with interleaved real and imaginary components.
To start Quantitative Susceptibility Mapping, select from the Toolkits menu: 
This brings up the Quantitative Susceptibility Mapping tool:
