Hawaii Administrative Rules › Title 11 - DEPARTMENT OF HEALTH › Subtitle 1 - GENERAL DEPARTMENTAL PROVISIONS › Chapter 45 - RADIATION CONTROL › Subchapter 6 - X-RAYS IN THE HEALING ARTS › Section 11-45-117 - All diagnostic x-ray systems

Current through June, 2024
(a) The control
				  panel containing the main power switch shall bear the warning statement,
				  legible and accessible to view: "WARNING: This x-ray unit may be dangerous to
				  patient and operator unless safe exposure factors and operating instructions
				  are observed."
(b) On
				  battery-powered x-ray generators, visual means shall be provided on the control
				  panel to indicate whether the battery is in a state of charge adequate for
				  proper operation.
(c) The leakage
				  radiation from the diagnostic source assembly measured at a distance of one
				  meter in any direction from the source shall not exceed one hundred
				  milliroentgens (25.8 microcoulombs per kilogram) in one hour when the x-ray
				  tube is operated at its leakage technique factors. Compliance shall be
				  determined by measurements averaged over an area of one hundred square
				  centimeters with no linear dimension greater than twenty centimeters.
(d) The radiation emitted by a component
				  other than the diagnostic source assembly shall not exceed two milliroentgens
				  (0.516 microcoulombs per kilogram) in one hour at five centimeters from any
				  accessible surface of the component when it is operated in an assembled x-ray
				  system under any conditions for which it was designed. Compliance shall be
				  determined by measurements averaged over an area of one hundred square
				  centimeters with no linear dimension greater than twenty centimeters.
(e) Beam quality:
(1) The half-value layer of the useful beam
				  for a given x-ray tube potential shall not be less than the appropriate value
				  specified in Appendix C of this subchapter under "specified dental systems,"
				  for any dental system designed for use with intraoral image receptors and
				  manufactured after December 1, 1980; and under "other x-ray systems," for all
				  other x-ray systems subject to this section. If it is necessary to determine
				  such half-value layer at an x-ray tube potential which is not listed in
				  Appendix C, linear interpolation or extrapolation may be made. Positive means
				  shall be provided to insure that at least the minimum filtration needed to
				  achieve the above beam quality requirements is in the useful beam during each
				  exposure.
(2) For capacitor energy
				  storage equipment, compliance with the requirements of paragraph (1) shall be
				  determined with the maximum quantity of charge per exposure. This shall be
				  deemed to have been met if an milliamperes-second of ten has been
				  used.
(3) The required minimal
				  half-value layer of the useful beam shall include the filtration contributed by
				  all materials which are permanently between the source and the
				  patient.
(4) For x-ray systems
				  which have variable kilovoltage peak and variable filtration for the useful
				  beam, a device shall link the kilovolts peak selector with the filter(s) and
				  shall prevent an exposure unless the minimum amount of filtration necessary to
				  produce the half-value layer required by paragraph (1) is in the useful beam
				  for the given kilovolts peak which has been selected.