Eighteeth HyperLight-G - Page 25

6 Operation
Page 25 / 42
6.7 Dose Area Product (DAP)
Turn on the machine and place the MagicMax in the position of the outlet,
then adjust the loading time and enable the exposure function, and then
observe the measurement value of different loading time on the computer.
test condition
Exposure time（s）
Air Kerma
(mGy)
Dose Area Product
(mGy*cm
2
)
65kV，2mA
0.02
0.03
0.765
0.03
0.05
1.275
0.04
0.07
1.785
0.05
0.1
2.55
0.06
0.12
3.06
0.08
0.17
4.335
0.1
0.22
5.61
0.13
0.3
7.65
0.16
0.38
9.69
0.2
0.48
12.24
0.25
0.6
15.3
0.32
0.76
19.38
0.4
0.95
24.225
0.5
1.21
30.855
0.63
1.5
38.25
0.8
1.95
49.725
1
2.5
63.75
1.25
3.1
79.05
1.6
4.01
102.255
2
5
127.5
Overall deviation of the air kerma from the values shown does not
exceed 40%. The exit field size at the end of the collimator cone (20 cm from
the focal spot) is 5.7 cm. Therefore,
DAP=mGy×π (5.7CM/2)
2
WAR NING
A duty cycle of 1:30 is required after each X-ray discharge to prevent
over-heating damage to the X-ray tube.
6.8 Calibration Checks
The HyperLight-G is factory calibrated and tested prior to release .
The following is a detail of the testing equipment, used at the factory, to