The following lists a number of corrections to the current published version. Table 2.1: Ferromagnetic M is parallel to external H and B0 M is actually anti-parallel to the internal H, the “demagnetising field”. Figure 2.21: The force at each end is T/l (torque divided by length). The equation stated in the caption is the … More Essentials of MRI Safety- corrections & clarifications
The presence of a cochlear implant (CI) used to be an absolute contraindication for MRI unless the internal magnet was surgically removed prior to scanning. More recently implant manufacturers produced devices labelled as MR conditional. The main complications in MRI arise from the magnetic force and torque on the internal magnet from B0. To address … More Are cochlear implants MR conditional?