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Results of a blinded reading of the parametric maps of cerebral blood flow
Reader 1Reader 2
Raw Mean (σ)ICA Mean (σ)PRaw Mean (σ)ICA Mean (σ)P
Artifact severity2.5(0.7)1.3(1.1)<0.052.8(0.4)1.0(0.9)<0.05
Image quality1.1(0.5)0.5(0.8)<0.051.3(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.