§ 223.2a. Definitions.
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.
Authority 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).
Source The provisions of this § 223.2a adopted October 2, 1998, effective October 3, 1998, 28 Pa.B. 4894.
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