DEXIS 14014550 Manual Del Usuario página 32

DEXIS
X-ray Dose / Exposure Time Settings
The DEXIS Sensor has been designed to be used with a wide range of dose
settings between 20 uGy and 2,000 uGy, to allow adjustments of the dose to the
specific diagnostic task, and to compensate for under- and over-exposure. As
a general recommendation, start by using dose / exposure time settings
recommended by your X-ray source manufacturer for digital X-ray sensors.
The DEXIS Sensor can be used with much lower dose / exposure time settings
than radiographic film. Nevertheless, low dose operation of a digital sensor in
general can result in a grainy image appearance. If the image of the DEXIS
Sensor appears grainy, increase the dose settings. If you obtain good results
with a particular setting, you might try a lower dose setting to see if you still gain
good results.
The DEXIS Sensor can work at higher dose /exposure time settings, if needed
for a particular diagnostic task. At high dose / exposure time settings, it might
not be possible to distinguish air from soft tissue. Such regions may appear
overexposed. If air and soft tissue regions in the image appear overexposed,
reduce the dose settings.
Remember, as with standard film, you will need to adjust the duration setting to
compensate for tooth type (central incisor to molar) and patient body type
(larger adult to small child). Ultimately, the settings you choose should be what
you consider to be suitable for your diagnostic needs.
X-ray Sharpness / Contrast
Many parts of the X-ray imaging system contribute to the sharpness and
contrast of the image. It is recommended that you use a dental phantom for a
periodic (at least annual) assessment of the image quality by performing a side-
by-side comparison of an initial dental phantom image to a current dental
phantom image to ensure that the images have sufficient quality for diagnostic
purposes in your application.
Dental phantom images should be acquired with fixed settings for X-ray dose
(kV, mA, distance), and a fixed and reproducible alignment of the X-ray source
and the dental phantom to the DEXIS Sensor.
NOTE: Contact DEXIS technical support for recommendations about
commercially available dental phantoms.
Display Image
Refer to the software manual for guidance on how to ensure good display
settings and image display properties. It is recommended to view images on a
factory calibrated LCD/LED monitor with at least 2,560 x 1,440 pixel resolution
at 0.25 to 0.26 dot pitch or better and 32bit true color, in native resolution.
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