Strategies for avoiding image artefacts when scanner is used for recording of non-MR signals
Hanson L, Skimminge A, Hanson C
Copenhagen University Hospital Hvidovre
Surplus sampling capacity of MR scanners can be used to record non-MR signals as has been demonstrated previously. If the non-MR signals are encoded in the oversampled frequency range of the scanner, i.e. outside the field of view, such signals are invisible in the images but can be extracted from the imaging raw data, a technique resembling ""mag stripe"" encoding of soundtracks in movies. Even though the non-MR-signals are encoded at frequencies corresponding to positions outside the field of view, there may be ringing artefacts appearing in the MR images. Two strategies for eliminating such artefacts are presented.