An official website of the United States government
The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before
sharing sensitive information, make sure you’re on a federal
government site.
The site is secure.
The https:// ensures that you are connecting to the
official website and that any information you provide is encrypted
and transmitted securely.
Beardmore AB, Rosen II, Cheek DA, Fields RS, Hogstrom KR.Beardmore AB, et al. Among authors: hogstrom kr.J Appl Clin Med Phys. 2008 Jun 23;9(3):43-57. doi: 10.1120/jacmp.v9i3.2773.J Appl Clin Med Phys. 2008.PMID: 18716591Free PMC article.