58
<Table 4. Recommendation on Exposure Time >
Exposure
condition
Dose
(μGy)
60kvp
6mA
60kVp
2mA
65kVp
5mA
Patient
Adult Adult Adult
SID 28cm 18cm 28cm
Intra Oral X-ray Unit
(Model name)
No
Filter
VX 70 AnyRay ESX
Approximate Exposure Time (sec)
0.12 ~ 0.2 0.1 ~ 0.2 0.18 ~ 0.28
Molar 400 ~ 600
0.16 ~ 0.25 0.15 ~ 0.25 0.24 ~ 0.34
* SID : Source to imaging receptor Distance
*Recommendation on Exposure Time is limited to Intra Oral X-ray Unit in the above table
For larger body types : increase the source current by 25%
For children(5~21age) : reduce the source current (or Exposure time)
by 20%
For edentulous patients : reduce the source current by 20%.
Since the X-ray exposure condition can be changed depending on the age,
gender and bone density of the patient, in case of Pediatric, X-ray exposure
condition can be changed by expert’s judge.
For further information, please refer to FDA Pediatric X-ray Imaging
webpage,
http://www.fda.gov/radiation-
emittingproducts/radiationemittingproductsandprocedures/medicalimaging/ucm298899.htm)
The X-ray dose required for image acquisition can vary depending on the X-
ray source and environmental circumstances. You must maintain the
exposure time and change the kVp and mA values according to the signal
level. In addition, if the X-ray source and the distance to the sensor were
changed during the initial installation, the distance (from cone to detector)
must be changed to the 80mm setting.
The exposure time may vary depending on the age, gender, and bone
density of the patient.
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