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

. 2018 Feb 1;166:400–424. doi: 10.1016/j.neuroimage.2017.10.034

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

© 2017 The Authors

This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).

PMC Copyright notice

Fig. 4 — One volunteer was scanned for testing purposes at different positions on the scanning table, depicting the effect of gradient distortion (note the warping in the neck). Correction for gradient distortion (C and D) substantially improves alignment. i: Subject placed low in the scanner (Baseline). ii: Subject placed in the centre of the scanner. iii: Subject placed higher into the scanner. A: ii (red outline) linearly registered to i (background) (Cross correlation: 0.90). B: iii (red outline) linearly registered to i (background) (Cross correlation: 0.83). C: ii (red outline) linearly registered to i (background) after GDC (Cross correlation: 0.98). D: iii (red outline) linearly registered to i (background) after GDC (Cross correlation: 0.96). Regions highlighting the largest effect (i.e. improved alignment of the ventricle) of the GDC have been zoomed to a 3:1 scale.