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.
Accuracy as a function of the background expansion and lung reduction. The green dotted lines mark the correct behavior of a non-biased dataset when more and more background is included, and the red dotted lines indicate the expected reduction of the classification rate as the lungs are removed from the analysis. Blue lines show the accuracy for a given expansion or reduction with a vertical line indicating the standard deviation.
