KaVo DEXIS Titanium Manuel De L'utilisateur page 25

Install ation, Care, an d Mai nte nance
X-ray Dose / Exposure Time Settings
The DEXIS Titanium sensor has been designed to be used with a wide
range of dose settings between 20 uGy and 2,000 uGy, to allow adjust-
ments 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 manu-
facturer for digital X-ray sensors.
The DEXIS Titanium sensor can be used with much lower dose / exposure
time settings. Nevertheless, low dose operation of a digital sensor in gen-
eral can result in a grainy image appearance. If the image of the DEXIS Ti-
tanium 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 Titanium sensor can work at higher dose /exposure time set-
tings, 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 set-
ting 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 perform-
ing a side-by-side comparison of an initial dental phantom image to a cur-
rent dental phantom image to ensure that the images have sufficient
quality for diagnostic purposes in your application.
English 19