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.
Frequency distribution of voxels in supine and prone positions. Mean number of voxels, expressed as a percentage of the total number of voxels, for every 10 H.U. changes in CT-derived lung density, in supine (red) and prone (blue) positions. The red and blue inserts refer to the mean values of FRC and lung weight in supine and prone positions, respectively. The coefficient of variation of voxel distribution was 0.32 in supine and 0.23 in prone positions
