Automated Detection of Motion Artefacts in MR Imaging Using Decision Forests

Figure 6

If bulk patient motion occurred after of a radial acquisition had completed, the image quality is degraded by smearing in the horizontal direction. The red frame indicates the region of interest in which features were extracted.

(a) Reconstruction from spiral acquisition without any motion. Visualization window set to

(b) Reconstruction from spiral acquisition where 10 spirals () after of the acquisition were replaced. Visualization window set to

(c) Difference image of the two reconstructions shown on the left side. Visualization window set to