Florida Administrative Code › 64 - DEPARTMENT OF HEALTH › 64E - Division of Environmental Health › Chapter 64E-5 - CONTROL OF RADIATION HAZARDS › Section 64E-5.503 - General Requirements for All Diagnostic X-Ray Systems

Current through Reg. 50, No. 138; July 16, 2024
In addition to other requirements of this part, all
				  diagnostic x-ray systems shall meet the following requirements:
(1) Warning Label. The main control panel and
				all auxiliary control panels of the x-ray system shall bear the equivalent
				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."
(2) Battery Charge Indicator. Visual means
				shall be provided on the control panel of battery-powered x-ray generators to
				indicate whether the battery is in a state of charge adequate for proper
				operation.
(3) Leakage Radiation
				from the Diagnostic Source Assembly. The leakage radiation from the diagnostic
				source assembly measured at a distance of 1 meter in any direction from the
				source shall not exceed 100 milliroentgens (25.8 uC per kg) in 1 hour when the
				x-ray tube is operated at its leakage technique factors. Compliance shall be
				determined by measurements averaged over an area of 100 square centimeters with
				no linear dimension greater than 20 centimeters.
(4) Radiation from Components Other than the
				Diagnostic Source Assembly. The radiation emitted by a component other than the
				diagnostic source assembly shall not exceed 2 milliroentgens (0.516 uC per kg)
				in 1 hour at 5 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 100 square centimeters with no linear dimension greater than 20
				centimeters.
(5) Beam Quality.
(a) Half-value Layer. The half-value layer
				(HVL) of the useful beam for a given x-ray tube potential shall not be less
				than the values shown below. If it is necessary to determine such half-value
				layer at an x-ray tube potential which is not listed below, linear
				interpolation or extrapolation may be made.
Design operating range (Kilovolts peak)
Measured potential (Kilovolts peak)
Half-value layer (Millimeters of aluminum)
Below 50
30
0.3
40
0.4
49
0.5
50 to 70
50
1.2
60
1.3
70
1.5
Above 70
71
2.1
80
2.3
90
2.5
100
2.7
110
3.0
120
3.2
130
3.5
140
3.8
150
4.1
1. The above
				HVL criteria will be considered to have been met if it can be demonstrated that
				the aluminum equivalent of the total filtration in the primary beam is not less
				than that shown below:
Filtration Required vs. Operating
							 Voltage
Operating Voltage (kVp)
Total Filtration (inherent plus added) (millimeters
							 aluminum equivalent)
Below 50
0.5 millimeters
50-70
1.5 millimeters
Above 70
2.5 millimeters
2.
				Beryllium window tubes shall have a minimum of 0.5 millimeters aluminum
				equivalent filtration permanently mounted in the useful beam.
3. For capacitor energy storage equipment,
				compliance shall be determined with the maximum quantity of charge per
				exposure.
4. The required minimum
				aluminum equivalent filtration shall include the filtration contributed by all
				materials which are always present between the focal spot of the tube and the
				patient.
5. In addition to the
				requirements of paragraph (5)(a)1., above, all intraoral dental radiographic
				systems manufactured on and after December 1, 1980, shall have a minimum
				half-value layer not less than 1.5 millimeters aluminum equivalent filtration
				permanently installed in the useful beam.