County of Los Angeles
Department of Public Health
5050 Commerce Drive
Baldwin Park, CA 91706
Note: PDF documents on this site were created using Adobe Acrobat 5.0 or later. If you are using an earlier version of Adobe Acrobat Reader (4.x or less), document functionality may be reduced.
These terminologies are commonly used in Radiation Management
Certification or permit as required by the State Radiologic Health Branch for who is allowed to supervise and operate an X-ray machine.
Technique and process used to create images of the human body (or parts and function) for clinical purposes (medical procedures seeking to reveal, diagnose or examine disease) or medical science (including the study of normal anatomy and physiology).
Users of radioactive material and persons possessing generally licensed devices containing radioactive material are required to be licensed and registered with the State Radiologic Health Branch.
Direct transmission of heat or electromagnetic energy through space or another medium. (example: X-ray)
Means and ways to limit unnecessary radiation exposure to the operator and the public.
The quantity used to indicate the amount of ionization in air produced by X-ray or gamma radiation while conducting radiologic procedures.
The science of protecting people and the environment from the harmful effects of ionizing radiation, which includes both particle radiation and high energy electromagnetic radiation.
Reduction of radiation by interposing a shield of absorbing material between any radioactive source and a person, work area, or radiation-sensitive device.
Any material, solid, liquid, or gas, which emits radiation spontaneously.
An unstable element that releases radiation as it breaks down. Also used in imaging tests or as a treatment.
An emergency where radioactive materials in significant concentrations escape into the environment. If the concentrations of the materials are high enough, they could be dangerous to health.
State regulations that includes licensing of radioactive materials, registration of X-ray-producing machines, certification of medical and industrial X-ray and radioactive material users, inspection of facilities using radiation, investigation of radiation incidents, and surveillance of radioactive contamination in the environment.
RHB (Radiologic Health Branch):
Primary State agency that is responsible for enforcing the laws and regulations designed to protect the public, radiation workers, and the environment.
A stream of high energy photons, used for their penetrating power in radiography, radiology, radiotherapy, and scientific research.
List of Radiation Management staff contact information
On-site visits or inspections of facilities that possess any type of X-ray machine to verify compliance with Federal, State and local regulations.
Radioactive Materials Inspection:
On-site visits or inspections of facilities that possess any type of radioactive material
to verify compliance with Federal, State and local regulations.
Material that emits radiation energy in the form of alpha, beta, or gamma particles or rays.
To pay for your Public Health Permit and/or License using your Credit Card (Visa, MasterCard, American Express, or Discover), Debit Card, or Electronic Check (ECheck), please visit our
A convenience fee per transaction will apply. The convenience fee for Credit/Debit Cards is 2.22% with a $1.49 minimum. Electronic Check fees are only $0.49. Please have your Account ID and your Facility ID
numbers from your billing statement ready. Payment will only be accepted online for the total amount owed on an
account. Terms and Conditions apply. For more information about Permit and License Billing, please visit our
Payment information page
Public Health has made reasonable efforts to provide accurate translation. However, no computerized translation is perfect and is not intended to replace traditional translation methods. If questions arise concerning the accuracy of the information, please refer to the English edition of the website, which is the official version.