Reduction of Metal Artifacts in Computed Tomographies for the Planning and Simulation of Radiation Therapy

Subject was to evaluate techniques for the reduction of metal artifacts in X-ray computed tomographies (CT). Compared to simulated CT projection data, real measurements allowed less improvements in image quality. Neither could metal artifacts be eliminated completely, nor was there a signiicant gain regarding the presentation of anatomical structures in the immediate neighbourhood of metal objects. Reduction of global image noise, however, was clearly recognizable. For further processing of the tomographies including several applications in the eld of radiation therapy, this promises improved accuracy and numerical stability.