Due to the difference in magnetic susceptibility of air, teeth and bone, magnetic susceptibility mapping has the potential to enable segmentation of these regions despite the absence of direct MRI signal. Several methods have been described which attempt to calculate the magnetic susceptibility within air and bone. Two datasets are used to test the ability of these methods to distinguish between air and bone. The performance of all methods varied between datasets and depended strongly on the parameters selected. None of the methods performed consistently better across groups, but all showed potential to improve air/bone segmentation using susceptibility mapping.