Eighteeth HyperLight-G - Leakage Dose

4 Safety Precautions
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4.2 Leakage Dose
Leakage Dose
Permissive Range
65 kV, 2 mA, 0.5 s (Max. Exposure
Condition)
At Focal Spot to Distance 1 m 1 : 30
Duty Cycle
< 0.25 mGy/h
In order to verify compliance with this leakage requirement, device is
tested for radiation leakage at 1m from the focal spot. The highest
measurement out must be lower than 0.25mGy/hr in order for the device to
successfully pass product release testing.
4.3 Scatter
The significant zone of occupancy for operators has been further verified
by internal testing. A HyperLight-G device was remotely fired into a water
phantom（25 X 25 X 10cm） repeatedly, with an ion chamber recording
radiation readings in the room, first to establish the vertical significant zone of
occupancy and then to establish the horizontal significant zone of occupancy.
Each exposure was taken at 0.5 seconds. The vertical significant zone of
occupancy measures 60 cm X 200 cm, while the horizontal significant zone of
occupancy is 60 cm X 60 cm. In order to verify the accuracy of the measured
value, use the calibrated instrument.