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QSA Global Inc.
40 North Avenue Burlington, MA 01803
888.272.2242
781.272.2000
F: 781.359.9179
qsa-global.com
RADIATION ZONES
.
Output Radiation Levels
OpenVision™ DX radiation levels vary depending on kV/mA settings. QSA Global, Inc performs testing at maximum
power at the highest kV setting (70 kV, 0.17 mA) to verify collimation and image quality. Operators must be aware of safe
boundary distances while using the OpenVision DX. When the main housing is fully expanded (“D” = 53 cm [20.8 in]), the
most susceptible area of high dose rate (when specimens do not block entire X-ray output beam) is immediately adjacent
to imager housing. The “C” callout in Figure 8 is positioned in this approximate area.
Figure 8 - OpenVision DX Output Boundary Distances
Figure 8 shows boundary distances for 2, 0.75 and 0.25 mR/hr. Table 3 below details typical distances for these
boundary levels with different operating conditions.
NOTICE:
The imager shield (not shown in Figure 8) provides shielding to either side of the imager when the specimen
being imaged (e.g., small objects) does not completely attenuate the X-ray output.
Table 3 Boundary Distance Comparison
Main Housing Distance
to Imager (in [cm])
“D”
kV / mA
Imager
Shield?
Boundary Distance (ft [m])
2 mR/hr
(20
Sv/hr)
“A”
0.75 mR/hr
(7.5
Sv/hr)
“B”
0.25 mR/hr
(2.5
Sv/hr)
“C”
20.8 [53] (Fully Expanded)
70 / .17
No
82 [24.9]
134 [40.7] 231
[70.5]
20.8 [53] (Fully Expanded)
70 / .17
Yes
10.4 [3.2]
17.4 [5.3]
30 [9.2]
13.8 [35]
70 / .17
No
17.4 [5.3]
28.2 [8.6]
49 [15]
13.8 [35]
70 / .17
Yes
9.8 [3.0]
16.1 [4.9]
27 [8.5]
Actual measurements can vary based on the material being scanned and its geometry. To minimize operator exposure,
QSA Global, Inc. recommends using a backscatter shield assembly (Item # 415600) with your OpenVision DX.
Main Housing
Imager
