Introduction / Background: MR imaging of arthroplasty has traditionally been limited by the presence of artifact generated by the metallic components, which comparatively demonstrate higher magnetic susceptibility than the adjacent bone and soft tissue (1-3). The sources of these artifacts include induction of radiofrequency eddy currents in the metal, warping of the slice during slice selectio...

In the course of routine fast spin echo (FSE) magnetic resonance (MR) imaging of knees, we have noticed a distinct and recurrent artifact on MR sagittal knee images. The artifact usually appears as a focal dot of high signal intensity and/or c-shaped ripples at a non-orthogonal angle (Figure 1). The technical features of this artifact have been previously described in an ISMRM abstract in 1995,...

ID: 8312 Title: The use of dual-energy CT images for Monte Carlo treatment planning: material extraction and metal artifact reduction Purpose: To investigate the feasibility of dual-energy CT-based material extraction (DECT) for Monte Carlo (MC) dose calculations, to evaluate metal streaking artifact reduction using DECT and to propose a novel scanning technique for motion artifacts reduction. ...