Quality Of The X-Ray Images; Problem Solving - Myray ZEN-X Instrucciones De Uso

Clean and disinfect the sensor cradle on a regular basis. The sensor mount can be sterilized
in autoclave. It is recommended to have an adequate number of sensor cradles so that a
clean one can be used for each patient for whom x-rays need to be taken. Additional cradles
can be ordered from the dealer who supplied the apparatus.

20 Quality of the x-ray images

Unlike common x-ray film, the ZEN-X / ZEN-Xi system tends to automatically correct any exposure errors, providing
images that are always usable. Notwithstanding the sensor allows images with a wide range of grey levels to be cap-
tured, computer monitors display only 256, therefore in most cases the software will obtain a satisfactory image even
from a picture taken with incorrect exposure. Keep in mind there are however boundaries beyond which results cannot
be corrected.
The x-ray sensor is more sensitive than x-ray film therefore exposure times usually have to be reduced. See the infor-
mation given in paragraph Sensor characteristics - Compatibility with x-ray generators.
To obtain top performance of digital x-ray sensors, it is important to keep in mind that there are some differences com-
pared to film. Insufficient exposure is clearly seen on x-ray film as the areas corresponding to soft tissues are dark. On
the other hand, when a digital sensor is used, the image's background noise increases (salt and pepper noise) and the
tonal range is insufficient.
Excessive exposure (time too long) on x-ray film causes the image to be too dense (dark) while the image will lose
contrast in a digital sensor.
It is a common mistake to confuse excessive exposure with insufficient exposure therefore further increase
the exposure times.
It is important to check and note this limit with your own x-ray system in order to be sure not to exceed it during dental
treatment as the quality of the images obtained under these conditions will be poor or even unusable.
IMPORTANT INFORMATION !
Before attempting to take x-ray pictures on patients, it is advisable to take some test pictures on phantoms, comparing
the results obtained to the usual ones. Identify the best exposure conditions for your own x-ray system through trial
and error.

21 Problem solving

Problem found
Doubts concerning the sen-
sor efficiency
Image loss
44 EN
ZEN-X / ZEN-Xi
- OPERATING INSTRUCTION
Possible causes
Falling, banging, malfunctioning
Error in the management program or
PC operating system
Remedies
Do not use the sensor on a patient. Conduct
tests by capturing x-ray images using a phan-
tom. If there are doubts about proper opera-
tion, do not use the sensor and contact the
Service Center.
The last image captured can be recovered
by downloading it again from the sensor from
window "TWAIN data source" (see para-
®
graph Recovering the last image captured
iCapture user instructions). Do not shut off the
PC or disconnect the interface from the USB
port to avoid permanently losing the image.
®