"Ferromagnetic materials are also characterised by being made up of clusters of 1017 to 1021 atoms called magnetic domains, that all have their magnetic moments pointing in the same direction 1. The moments of the domains is random in non-magnetised materials, and point in the same direction in magnetised materials 1."
"Ferromagnetic materials are also characterised by being made up of clusters of 1017 to 1021 atoms called magnetic domains, that all have their magnetic moments pointing in the same direction 1. The moments of the domains is random in non-magnetised materials, and point in the same direction in magnetised materials 1."
"On MR images, these materials cause susceptibility artifacts characterised by loss of signal and spatial distortion, which is more prominent in ferromagnetic materials than paramagnetic or superparamagnetic materials 2. This can even occur with fragments too small to be seen on plain x-ray. This is a common finding in a cervical spine MRI post anterior fusion or MRI knee post-arthroscopy."
Expected headings
"Technique"
"Physical principles"