Connecticut Administrative Code › Title 19 - Public Health and Safety › 25d - X-Ray Devices used for Diagnosis and Therapy › Section 19-25d-2 - Definitions

Current through July 10, 2024
As used in sections 19-25d-2 to
				19-25d-11,
				inclusive:
"Aluminum equivalent" means the thickness of aluminum affording
				the same attenuation, under specified conditions, as the material in
				question.
"Dead-man switch" means a switch so constructed that a
				circuit-closing contact can only be maintained by continuous pressure by the
				operator.
"Diagnostic-type tube housing" means an x-ray tube housing so
				constructed that the leakage radiation at a distance of one meter from the
				target cannot exceed one hundred milliroentgens in one hour when the tube is
				operated at any of its specified ratings.
"Filter" means material placed in the useful beam to absorb
				preferentially the less penetrating radiations.
"Half-value layer (hvl)" means the thickness of an absorber
				required to reduce a beam or radiation to one-half its incident exposure dose
				rate.
"Inherent filtration" means the filtration in the useful beam
				due to the window of the x-ray tube and any permanent tube enclosure.
"Interlock" means a device for precluding access to an area of
				radiation hazard either by preventing entry or by automatically removing the
				hazard.
"Kilovolts peak (kvp)" means the crest value in kilovolts of
				the potential of a pulsating potential generator. When only one-half of the
				wave is used, the value refers to the useful half of the wave.
"Lead equivalent" means the thickness of lead affording the
				same attenuation, under specified conditions, as the material in
				question.
"Leakage radiation" means all radiation coming from within the
				tube housing except the useful beam.
"Owner" means a person or organization owning or having by law
				the actual control of the x-ray device or devices.
"Primary protective barrier" means a barrier sufficient to
				attentuate the useful beam.
"Protective apron" means an apron made of attenuating
				materials, used to reduce radiation exposure.
"Protective barrier" means a barrier of attenuating materials,
				used to reduce radiation exposure.
"Protective glove" means a glove made of attenuating materials,
				used to reduce radiation exposure.
"Scattered radiation" means radiation that, during passage
				through matter, has been deviated in direction.
"Secondary protective barrier" means a barrier sufficient to
				attenuate stray radiation.
"Shutter" means a device, generally of lead, fixed to an x-ray
				tube housing to intercept useful beam.
"Stray radiation" means radiation not serving any useful
				purpose. It includes leakage and secondary radiation.
"Therapeutic-type tube housing" means an x-ray tube housing so
				constructed that the leakage radiation at a distance of one meter from the
				target cannot exceed one roentgen in one hour; and at a distance of five
				centimeters from any point on the surface of the housing accessible to the
				patient cannot exceed thirty roentgens in one hour when the tube is operated at
				any of its specified ratings.
"Useful beam" means that part of the radiation which passes
				through the window, aperture, cone or other collimating device of the tube
				housing.