Metallic Implant Estimation Using Susceptibility Mapping
Magnetic field patterns can be used to identify the location and shape of metal devices and render them on images. The susceptibility difference between metallic implants and biological tissues causes severe magnetic field variations and image artifacts in MRI. By estimating the susceptibility map from the measured field variations, the implant region can be distinguished from surrounding low-signal tissues and artifacts, which may help diagnosis of complications from metallic implants.
Shi X, Yoon D, Koch KM, Hargreaves BA. Metallic implant geometry and susceptibility estimation using multispectral B0 field maps. Magn Reson Med. 2016 Jul 6. doi: 10.1002/mrm.26313.