Maximum Permissible Dose (Mpd); Radiographic Performance - Carestream DRX-Revolution Safety And Regulatory Information Manual

Safety and Regulatory Information
Maximum Permissible
Dose (MPD)
Radiographic
Performance
kVp Range
kVp Accuracy
Ripple (kVp)
Risetime (10– 90 %)
mAs Accuracy
Coefficient of linearity
Coefficient of
Reproducibility
1-7
CAUTION
Materials between the Tube and the patient may adversely
affect the resulting image.
Various studies on the effects of X-radiation have provided a foundation for
establishing the maximum permissible dose of X-radiation to which an
occupational worker may be exposed. The results of these studies have been
used by the NCRP and the ICRP to develop recommendations for MPD. In
addition, state or local regulators also provide mandatory occupational
exposure limits with which to comply.
Occupational Exposure Limits
Whole body: 5.0 rem/year
Extremity: 50.0 rem/year
Declared pregnant occupational worker: 0.5 rem/gestation period
40–150 kVp
±(5 % + 1) kVp, measured 5 ms after the beginning of the exposure; ±2 % between
70–85 kVp
±5 % p–p over the full operating range (for ripple frequency kHz
< 2.0 ms (typically < 1.5 ms)
±(10 % + 0.20) mAs: > 0.5 mAs
± (10 % + 0.5 mAs: 0.1 mAs–0.5 mAs
0.1 (Station to Station) for exposures mor 3.2 ms
< 0.05 for kVp and mAs parameters
:
9J0239