Results of a blinded reading of the parametric maps of cerebral blood flow
| Reader 1 | Reader 2 | |||||
|---|---|---|---|---|---|---|
| Raw Mean (σ) | ICA Mean (σ) | P | Raw Mean (σ) | ICA Mean (σ) | P | |
| Artifact severity | 2.5(0.7) | 1.3(1.1) | <0.05 | 2.8(0.4) | 1.0(0.9) | <0.05 |
| Image quality | 1.1(0.5) | 0.5(0.8) | <0.05 | 1.3(0.5) | 0.4(0.5) | <0.05 |
Note.—ICA indicates independent component analysis. A Wilcoxon signed rank test comparing the severity of the artifact and image quality before (raw) and after (ICA) independent component removal of arterial components showed that component.