ARIBEX Nomad Pro Veterinary - Page 8

NOMAD Pro
4
As shown in graphic representations,
maximum
protection (green area) from
backscatter radiation (red area) exists
when the NOMAD Pro is positioned
near the patient, is perpendicular to the
operator (with the patient’s head tilted if
needed), and the backscatter shield is
fully extended toward the pat
ient and
parallel to the operator.
Operation outside the protection zone
(or with a diminished protective zone)
requires proper precautions such as the
use of lead aprons.
Proper postioning
Do not operate if the backscatter
shield or collimator cone are broken!
Device held back
Shield slid back
Non-perpendicular
MAXIMUM PROTECTION MINIMIZED PROTECTION
Occupational Dose Limit
1
50mSv
5mSv
Occupational Dose Limit Requiring Dosimetry
1
Average Natural Background Radiation
2
3.65mSv
2.19mSv
Average Occupational Radiation Exposure for Flight Crews
3
Comparative Data for Whole Body Exposure (Annual)
1.00mSv
General Public Dose Limit
1
0.30mSv
Average Exposure Using NOMAD with D-Speed Film
4
0.12mSv
Average Exposure Using NOMAD with F-Speed Film or Digital Sensor
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1) Standards for Protection Against Radiation, 10 CFR 20 (US Federal Standards), 1994 (see also NCRP Report No. 116 )
2)
NCRP Report No. 145 (National Council on Radiation Protection and Measurements), p7-9
3) "Estimated Cosmic Radiation Doses for Flight
Personnel", Feng YJ et al, Space Medicine and Medical Engineering , 15(4) 2002, p265-9
4)
Normalized average assumes 7,200 exposures per year, and the average length of exposure for D-speed = 0.50 seconds, F-speed = 0.25
seconds, digital sensor = 0.20
seconds
0.20–0.70mSv
Range of Exposure for Dental Personnel Using Conventional X-rays
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