Careray Digital Medical Technology Co., Ltd.
5F,Building B3, Biobay, 218 Xinghu Street, Suzhou，Jiangsu, China,215123
o+86 512 86860288 f+86 512 86860388
F2AED Guidance
To prevent the detector from producing false-triggered images, do not hit or press the panel
surface abruptly. (False-triggered images are produced by a detector when it mistakenly
detects an event of X-ray exposure that actually does not happen.)
When the detector produces a false-triggered image, it will take some time for it to switch
back to "ready for exposure" state for next image acquisition.
Make sure that the object stays still during the course of image acquisition, and that the
detector remains in the "ready for exposure" state before pressing the hand switch to emit
X-ray.
Minimal dimensions of the exposure window are 12 cm (along scan direction) by 2 cm (along
readout direction).
Place the exposure area near the center of the detector surface, although this is not strictly
required.
The exposure area should be properly aligned with the sides of the detector.
To ensure the quality of the resulting RAD image, it is recommended to use a small exposure
time (i.e., ms) - large current (i.e., A) combination for a target dose.
If the resulting RAD image still presents a visible band, possible causes include, but are not
limited to, the following:
The triggered line lays among the top 24 rows, or among the bottom 10 rows of the
exposure area;
The grayscale value of the pixels around the triggered line is at the noise level.
These pixels do not carry information about the object of the current interest, and
therefore, the band cannot be corrected;
The image does not present enough coherent information the algorithm could use
to correct the band effectively;
Band too wide, exceeding 15 rows;
Object exhibits features that are narrow and straight (e.g., iron wire), and these
features are (almost) parallel to the scan direction.
www.careray.com
Careray Digital Medical Technology Co., Ltd.
5F,Building B3, Biobay, 218 Xinghu Street, Suzhou，Jiangsu, China,215123
o+86 512 86860288 f+86 512 86860388
For detailed information refer to the log file, or contact CareRay technical support
professionals.
API uses a default exposure time of 500 ms in the AED sync mode. If this default value does
not suit the needs of a given application, follow the steps below to add new exposure time.
Append the new exposure time (in ms) in the "AEDIntegrationTime" field sitting in
CareRay\conf\cfg.properties.
In CareRay Tool\conf\DetectorConf.xml, add a new "syncmode" section within the
corresponding "detector" section, and change "exptime" to the new exposure time
(in ms). Note that among the multiple sync modes supported by a detector model,
one and only one has "default" set to "true" while all the others are "false". True
means this sync mode is active by default. Always move the active sync mode to the
bottom of the "syncmode" list.
For example, if you want to use AED with 2-second exposure time, change
AEDIntegrationTime=500
to
AEDIntegrationTime=500, 2000
in CareRay\conf\cfg.properties, and then, in CareRay\conf\DetectorConf.xml add a
new syncmode section within the corresponding "detector" section.
<syncmodes>
...
<syncmode index="3" default="false">
<waittime>5</waittime>
<exptime>500</exptime>
<delaytime>100</delaytime>
</syncmode>
<syncmode index="3" default="true">
<waittime>5</waittime>
<exptime>2000</exptime>
<delaytime>100</delaytime>
</syncmode>
</syncmodes>
In NDT, never go to Utility -> Preference to change any configuration settings.
www.careray.com
