4746
NOMAD
Dose Area Product (DAP)
kV mA
Exposure Time
(milliseconds)
Air Kerma
(mGy)
Dose Area Product
(mGy*cm
2
)
60 2.5
20 0.07 2
40 0.14 4
400 1.36 39
600 2.05 58
1,000 3.41 96
Air Kerma at other distances from the focal spot can be determined by the following
formula; Air Kerma (at distance of X cm from focal spot)=Air Kerma (at 20 cm from focal
spot)*[ (20cm/X)
2
].
For exposure times between table values, Air Kerma and DAP is proportional to time.
Overall deviation of the air kerma from the values shown does not exceed 40%. The exit
field size at the end of the circular collimator cone (20 cm from the focal spot) is 6 cm. The
exit field size of the rectangular cone is 3cm x 4cm.
Therefore,
DAP = mGy x 28.27cm
2
Compliance with Applicable Standards
Standard Title Edition
IEC 60601-2-65
Complies with X-ray equipment for dental intra-oral
radiography IEC 60601-2-65:2012, NOMAD Pro 2.
2012
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