2017 Imaging for Physicists Coursebook

Summary 2

• Characterizing geometrical distortions can be done with a phantom – Avoid inducing additional susceptibility artifacts – Distortions depend on specific sequence

• Geometrical accuracy tends to deteriorate towards the body contour and tends to be good in the center of the body – Localization of external markers may be inaccurate

• Many possibilities exist to avoid artifacts or to minimize their impact. It is important to be aware of possible artifacts