Konica Minolta AeroDR SKR 4000, Operation Manual

Page: 34 / 60

34
Operation of DR Detector
Wireless communications environment
• With a wireless environment, it is possible that errors
such as no wireless connection, wireless communi-
cation terminates, and lengthened exposure cycle
time might occur.
HINT
• Problems with a wireless communications environment can
occur in the following conditions:
— Installed location of the access point is not good.
— When inserted in the wall stand, table, or stretcher, the
opening in the wall stand or table is too small and there
is no passage for the radio waves.
— The radio waves are not emitted due to metal parts close
to the antenna, which changes the antenna characteristics.
— For exposures where the body touches the DR Detector
directly, the radio waves may not be emitted if the body
completely covers both antennas or either of the antennas.
— Other devices use the same radio band, and cause inter-
ference
— When the 2.4 GHz band is used, using high frequency
therapy equipment will cause interference.
— When the DFS band is used, the access point changes chan-
nels if weather radar or air control radar is detected. This
may cause communication to be temporarily disconnected
Grid
IMPORTANT
• A capped grid is recommended when laying the grid over
the DR Detector on the table top or for exposure with the
X-ray device.
• Do not use a grid of which the antenna is covered with
metal, as the quality of wireless communication may be
significantly reduced.
• Use the following grid when exposing.
DR Detector
Grid
density
Grid
ratio
Conver -
gence
distance
Angle
error
AeroDR NS 1417 40 lp/cm Variety Variety
5.0° or
less
High-dose exposure
• When high-dose exposures are performed continu-
ously, afterimages of the last exposure will occa-
sionally be visible. The affect of afterimages in this
device can be resolved by leaving longer intervals
between exposures, so make the intervals between
exposures longer than usual when performing high-
dose exposure.
• During high-dose exposure, continual use of a lead
or other marker at the same position can cause
burning in of the afterimage. Therefore, avoid using
it in the same position. Also, if image burn-in is vis-
ible, contact Konica Minolta technical representa-
tives.
Exposure time for basic connection
IMPORTANT
• If the conditions are not met, X-rays may not be detected or
streaks may occur in the image.
• The maximum exposure time is as follows.
DR Detector
Maximum
exposure time
Minimum
exposure time
AeroDR NS 1417 3.0 seconds 2 milliseconds
• The exposure time for actual exposures should not
exceed the maximum exposure time you have set.
Otherwise, exposure may fail or correct images may
not be able to be obtained
Exposure with the X-ray automatic
detection function
• To ensure X-ray detection, make sure the following
conditions are met:
— When imaging the abdominal area, ensure the X-
ray exposure covers the entire DR Detector.
— For other body parts, perform X-ray exposure at
a range of 15 cm square or more at the center of
the DR Detector.
— Ensure that the exposure time and the S value
conditions satisfy the following conditions:
Exposure time S value
2.0 seconds or less 400 or less
0.9 seconds or less 800 or less
0.4 seconds or less 2000 or less