Arizona Administrative Code › Title 9 - HEALTH SERVICES › Chapter 7 - DEPARTMENT OF HEALTH SERVICES - RADIATION CONTROL › Article 6 - USE OF X-RAYS IN THE HEALING ARTS › Section R9-7-605 - X-ray Machine Standards

Current through Register Vol. 30, No. 28, July 12, 2024
A. A
				registrant shall prevent leakage radiation from the diagnostic source assembly
				measured at a distance of 1 meter in any direction from the source assembly
				from exceeding 25.8 µC/ kg (100 milliroentgens) in one hour when the x-ray tube
				is operated at its leakage technique factors. The Department shall determine
				compliance by obtaining measurements averaged over an area of 100 square
				centimeters (15.5 square inches) with no linear dimension greater than 20
				centimeters (7.9 inches).
B. The
				registrant shall prevent radiation emitted by a component other than the
				diagnostic source assembly from exceeding 516 nC/kg (2 milliroentgens) in one
				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. The Department shall determine compliance by obtaining measurements
				averaged over an area of 100 square centimeters (15.5 square inches) with no
				linear dimension greater than 20 centimeters (7.9 inches).
C. Beam quality.
1. The registrant shall prevent the useful
				beam half-value layer (HVL) for diagnostic x-ray given x-ray tube potential
				from falling below the values shown in Table I. If it is necessary to determine
				the HVL at an x-ray tube potential that is not listed in Table I, the
				registrant shall use linear interpolation or extrapolation to make the
				determination.
Table I
Design operating range (kilovolts peak)
Measured potential (kilovolts peak)
HVL (millimeters of aluminum) Dental Intraoral
								Units manufactured after December 1, 1980
Medical X-ray Units manufactured before June 10,
								2006 and Dental Intraoral Units manufactured on or before December 1,
								1980
Medical X-ray Units manufactured on or after June
								10, 2006
Below 51
30
1.5
0.3
0.3
40
1.5
0.4
0.4
50
1.5
0.5
0.5
51 to 70
51
1.5
1.2
1.3
60
1.5
1.3
1.5
70
1.5
1.5
1.8
Above 70
71
2.1
2.1
2.5
80
2.3
2.3
2.9
90
2.5
2.5
3.2
100
2.7
2.7
3.6
110
3.0
3.0
3.9
120
3.2
3.2
4.3
130
3.5
3.5
4.7
140
3.8
3.8
5.0
150
4.1
4.1
5.4
2.
				If the registrant demonstrates that the aluminum equivalent of the total
				filtration in the primary beam is not less than that shown in Table II, the
				registrant is considered to have met the criteria in subsection (C)(1).
Table II - Filtration Required vs. Operating
				  Voltage
Operating Voltage (kVp)
Total Filtration (inherent plus added)
								(millimeters aluminum equivalent)
Below 51
0.5 millimeters
51 - 70
1.5 millimeters
Above 70
2.5 millimeters
3.
				The registrant shall use beryllium window tubes that have a minimum of 0.5
				millimeters aluminum equivalent filtration permanently mounted in the useful
				beam.
4. For capacitor energy
				storage equipment, the Department shall determine compliance with the maximum
				quantity of charge per exposure.
5.
				When determining the minimum aluminum equivalent filtration, the registrant
				shall include the filtration contributed by all materials that are always
				present between the focal spot of the tube and the patient (for example, a
				tabletop when the tube is mounted "under the table" and inherent filtration of
				the tube).