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.
Simulated water phantom with 100 spherical detecting volumes placed along the CAX and at 10 cm OAX, 40 cm OAX, and 80 cm OAX at the same depths. d represents the distance from the neutron effective source to the detecting volumes. d′ is the distance from the surface of the phantom to the detecting volumes. diso is the distance from the effective neutron source to isocenter. z is the depth in the phantom. Figure modified from Zhang et al. (Ref. 25).
