FujiFilm FDR ES DR-ID1270, Operation Manual, Page: 63 / 76

Z-1
Appendix Z Precautions for Exposure
DR-ID1270 Operation Manual 897N120821E
Appendix Z
Precautions for Exposure
Z.1 Precautions for the Automatic X-ray
Detection Function
Z.1.1 Precautions for Making an Exposure
1 The fl at panel sensor cannot detect X-rays automatically unless Shot Ready (exposure ready status
indicator) on the image processing unit, the READY lamp among the status lamps on the fl at panel
sensor is lit green. Even if the indicator is not lit green, radiation can be delivered but an image will
not be output. Make sure that the indicator is lit green before making an exposure.
2 Check the tube current of the X-ray equipment in advance, and set exposure conditions based
on the tube current by referring to the table below. If the conditions are not met, X-rays cannot be
detected automatically and an image may not be acquired.
Tube current Tube voltage Exposure
time
SID Radiation fi eld
More than
40 mA
Set the tube voltage
according to the
anatomical region
and body thickness.
More than
1 ms
(*3)
Set the SID according to
the anatomical region.
Do not limit the radiation
fi eld to the bone region
(*1) only.
More than
20 mA and less
than 40 mA
Set the tube voltage
to more than 50 kV
according to the
anatomical region
and body thickness.
Set the SID to 100 cm (39.4 in.) or less and do not
limit the radiation fi eld to the bone region (*1) only.
Alternatively, set the SID according to the anatomical
region and include the directly exposed area (*2).
More than
10 mA and less
than 20 mA
100 cm (39.4 in.) or less Include the directly
exposed area (*2).
Less than
10 mA
The automatic X-ray detection function cannot be used.
*1 When making an exposure, for example, for a fi nger or knee, set the radiation fi eld to at least 6 cm × 10 cm
(2.4 in. × 3.9 in.) for the former and at least 10 cm × 10 cm (3.9 in. × 3.9 in.) for the latter, so that the fi eld is
not limited to the bone region only.
*2 The areas of the fl at panel sensor, which are directly exposed to X-rays that do not pass through the
subject, must have a width of more than 3 cm (1.2 in.) from the subject.
*3 Depending on the X-ray equipment, the actual exposure time may differ from the set time. Before use,
make sure that the fl at panel sensor can detect X-rays automatically.
3 As illustrated below, if the subject whose thinnest part is at least 40 cm (15.7 in.) in thickness
covers the entire surface of the fl at panel sensor, it cannot detect X-rays automatically and an
image may not be acquired. In this case, make an exposure for the region including the directly
exposed area or switch to the High Sensitivity Mode. While the high sensitivity mode is being set,
a shock might cause a blank image.
Figure of an exposure for the subject covering the entire surface of the flat panel sensor