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

. 2024 Nov 12;2:1–52. doi: 10.1162/imag_a_00347

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

No rights reserved. This work was authored as part of the Contributor's official duties as an Employee of the United States Government and is therefore a work of the United States Government. In accordance with 17 U.S.C. 105, no copyright protection is available for such works under U.S. Law.

PMC Copyright notice

Fig. 9. — QC images generated by afni_proc.py for Ex. 2, showing: (A) the raw EPI volume in native space; and (B) the unmasked TSNR after the volreg processing block, prior to regression modeling. The unmasked TSNR image shows evidence for ghosting artifact overlapping into the brain (cyan arrows); as described in Figure 2, this shows the benefits of not masking data during processing to understand it better and more reliably evaluate it. The fact that the EPI has been acquired with such a tight FOV (see panel A) likely contributes to the presence of ghosting. The TSNR map also shows the presence of EPI distortion (the anterior TSNR pattern extends beyond the anatomical boundaries, even though structural alignment is good).