25 Pa. Code § 223.2a
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:
25 Pa. Code § 223.2a
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).