KaVo ProXam iS, Инструкция по эксплуатации, Страница: 18 / 30

8 Image quality control
Verify the image quality after installing the software and before patient
exposure. Perform quality control check according to the requirements of
local authorities, using for example Quart phantom or similar.
It is recommended to regularly monitor the image quality using the same
phantom according to the requirements of local authorities. See also KaVo
ProXam X-ray unit intraoral systems Constancy test Instructions for use.
Before performing phantom exposures verify that the brightness and contrast
settings of the monitor are accurate by using a SMPTE test pattern or
similar.
8.1 Quality check using SMPTE test pattern
The test image is specified by the Society of Motion Picture and Television
Engineers (www.smpte.org), and follows the SMPTE Recommended
Practise RP 133-1991 Specifications for Medical Diagnostic Imaging Test
Pattern for Television Monitors and Hard-Copy Recording Cameras. This
image should be used for monitor setting and quality checks performed:
•
Before every working day: The 5% gray field inside the 0% field and the
95% gray field inside the 100% field should be visible. If not, adjust the
brightness and contrast of the monitor.
• Every month: The line raster in the corners and in the centre must be
visible, the vertical and horizontal lines must form undistorted squares
and the homogeneous grey background must not be coloured.
9 Sensor holders
The sensor holders provide an easy way to position the sensor for different
anatomical and diagnostic needs. For instructions how to use the sensor
holders, please refer to the manual supplied with the sensor holder package.
8 Image quality control
14 KaVo ProXam iS Instructions for use