VTech EzRay Air Portable - Page 89

Appendix
EzRay Air Portable (Model: VEX-P300) User Manual 87
ENGLISH
Phosphor Plate
Dose Area Product (DAP) Table
(60 kVp, 2.5 mA, SSD 200 mm)
FOV: Ø 6 cm FOV : 3 x 4 cm FOV : 2 x 3 cm
t (s) Dose (mGy.cm
2
)
0.30 14.7 6.2 3.1
0.42 20.1 8.5 4.3
0.60 29.2 12.4 6.2
0.65 31.6 13.4 6.7
Dose Area Product (DAP) Table
(65 kVp, 2.5 mA, SSD 200 mm)
FOV: Ø 6 cm FOV : 3 x 4 cm FOV : 2 x 3 cm
t (s) Dose (mGy.cm
2
)
0.28 15.3 6.5 3.2
0.40 23.1 9.8 4.9
0.58 32.9 14.0 7.0
0.63 36.4 15.4 7.7
A.4.2 Leakage Dose
Scope
IEC 60601-2-65 203.12.4
Requirements
In the LOADING STATE, the AIR KERMA due to LEAKAGE RADIATION from X-RAY
SOURCE ASSEMBLIES, 1 m from the FOCAL SPOT, average over an area of 100
cm
2
of which no principal linear dimension exceeds 20 cm when operated at the
NOMINAL X-RAY TUBE VOLTAGE under the condition of LOADING corresponding to
the reference LOADING conditions, shall not exceed 0.25 mGy in one hour.
Leakage Dose Permissive Range
65 kVp, 2.5 mA, 1.0 s (Max. Exposure Condition)
At Focal Spot to Distance 1 m
1 : 60 Duty Cycle
< 0.25 mGy/h
Test Equipment
Instrument Manufacturer Model S/N
X / Gamma
Survey Meter
Radcal Co. 9015/10X5-180 91-1470/19069