Fig. 2

The image quality and artifact score for the reference and multiple simulated activities. The image quality score (a) shows that the 4-min reference reconstruction (4 m) and the reconstructions with 35%, 30%, and 25% of the original activity have a good image quality (green). The 20% reconstructions have a somewhat lower quality (orange). The artifact score (b) shows that reconstructions with 15%, 10%, and 5% activity have increasing artifacts (red). Results are reported as mean ± SD