Figure - PMC

Skip to main content

An official website of the United States government

Here's how you know

Here's how you know

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure .gov websites use HTTPS
A lock ( ) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

View full-text article in PMC

. 2016 Nov 24;15:126. doi: 10.1186/s12938-016-0245-3

Search in PMC
Search in PubMed
View in NLM Catalog
Add to search

© The Author(s) 2016

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

PMC Copyright notice

Fig. 5 — Characteristics of VLF, LF and HF noise. Shown here are all results from one subject obtained during stages (1) outside the MRI bore, (2) inside the MRI bore without imaging, and (3) inside the MRI bore with imaging. Inside each section, the first row shows 30 s of VLF, LF, and HF noise extracted from the vPPG signal. As reference, the cardiac component of the vPPG signal is shown in gray color. The second and third row show the histograms and one-sided Fourier spectra from the entire signal with a duration of 5 min