title: A simple but useful way to assess fMRI scan qualities.
abstract: This short "how to" article describes a plot I find useful for assessing fMRI data quality. I discuss the reasoning behind the plot and how it is constructed. I create the plot in scans from several publicly available datasets to illustrate different kinds of fMRI signal variance, ranging from thermal noise to motion artifacts to respiratory-related signals. I also show how the plot can be used to understand the variance removed during denoising. Code to make the plot is provided with the article, and supplemental movies show plots for hundreds of additional subjects.
authors: NIMH, National Institute for Mental Health, Building 10 Room 4C104, 10 Center Dr., Bethesda, MD 20814, USA. Electronic address: jonathan.power@nih.gov.
authors: Jonathan D
authors: JD
authors: Power
mesh_terms: D059907:Functional Neuroimaging / Q000379:methods*; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods*; D008279:Magnetic Resonance Imaging / Q000379:methods*