Mississippi Administrative Code › Title 15 - Mississippi Department of Health › Part 21 - Division of Radiological Health › Subpart 78 - Radiological Health › Chapter 1 - REGULATIONS FOR CONTROL OF RADIATION IN MISSISSIPPI › Subchapter 6 - X-Rays In The Healing Arts › Rule 15-21-78-1.6.4 - General Requirements for all Diagnostic X-Ray Systems

Current through June 25, 2024
In addition to other requirements of this section, all
						diagnostic x-ray systems shall meet the following requirements:
1. Warning Label. 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."
2. Battery Charge
					 Indicator. 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.
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 µC/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. If leakage technique factors cannot be
						set on the control panel, then compliance shall be determined by measuring
						leakage at maximum kVp and an appropriate mAs.
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
						µC/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.
i. The half-value layer of the useful beam
					 for a given x-ray tube potential shall not be less than the values shown in
					 Table I. If it is necessary to determine such half-value layer at an x-ray tube
					 potential which is not listed in Table I, linear interpolation or extrapolation
					 may be made.
TABLE I
X-ray tube voltage
(kilovolt peak)
Minimum HVL (mm of
								Al)
Designed Operating Range
Measured Operating Potential
Dental Systems
Medical X-ray Systems Manufactured before 06/10/2006
Medical X-ray Systems Manufactured after 06/10/2006
Below 50
30
1.5
0.3
0.3
40
1.5
0.4
0.4
50
1.5
0.5
0.5
50 to 70
51
1.5
1.3
1.3
60
1.5
1.5
1.5
70
1.5
2.1
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
ii. For capacitor energy storage equipment,
					 compliance with the requirements of 1.6.4(5) shall be determined with the
					 maximum quantity of charge per exposure. This will be deemed to have been met
					 if a mAs of 5-10 has been used.
iii. 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.