Pennsylvania Code
Title 25 - ENVIRONMENTAL PROTECTION
Part I - Department of Environmental Protection
Subpart D - Environmental Health and Safety
Article V - Radiological Health
Chapter 223 - VETERINARY MEDICINE
GENERAL PROVISIONS
Section 223.2a - Definitions
Current through Register Vol. 54, No. 44, November 2, 2024
As used in this chapter, the following words and terms have the following meanings, unless the context clearly indicates otherwise:
C-Coefficient of variation-The ratio of the standard deviation to the mean value of a population of observations.
Dead-man switch-A switch so constructed that a circuit closing contact can be maintained only by continuous pressure on the switch by the operator.
Fluoroscopic imaging assembly-A subsystem in which X-ray photons produce a fluoroscopic image. The term includes the image receptors such as the image intensifier and spot-film device, electrical interlocks, if any, and structural material providing linkage between the image receptor and diagnostic source assembly.
Image receptor-A device, such as a fluorescent screen or radiographic film, which transforms incident X-ray photons either into a visible image or into another form which can be made into a visible image by further transformations.
Leakage radiation-Radiation emanating from the diagnostic or therapeutic source assembly except for the following:
(i) The useful beam.
(ii) Radiation produced when the exposure switch or timer is not activated.
The provisions of this §223.2a issued under sections 301 and 302 of the Radiation Protection Act (35 P. S. §§ 7110.301 and 7110.302); and section 1920-A of The Administrative Code of 1929 (71 P. S. § 510-20).
