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.
Bar charts displaying the percentage risk of secondary malignancy for X-rays and protons using assumptions in Table 1 for each of the different field numbers and their orientations (as in Table 2) in the case of a centrally located planning target volume and where the penumbral dose is either absent or varies from 10% to 50%. The radiobiological and fractionation parameters are as given in Figures 5 and 6. opp., opposed; orth., orthogonal.
