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.
(A) Axial reconstruction (0.5 mm3 resolution) of the 4–1 cm2 small field deliveries to doses of 10, 20, 40, and 80 Gy. The y scale is attenuation coefficient per pixel, showing a factor 10 variation between beams. (B) Four pixel-average region of interest values plotted versus the delivered monitor units, indicating strong linearity up to 80 Gy.
