58
www.vareximaging.com
R
E
FE
RE
NCE
M
ANUAL
4343W/4336W-G5/2530W-G5 X-ray Detectors
If corrections are not turned on (i.e. raw frames), multiple frames will be delivered to the
workstation (i.e. uncorrected exposed frame, and the post offset), see
Figure 58
.
Figure 58 Exposure: Raw Frames
13.2
vTrigger Acquisition (AED)
The vTrigger acquisition is controlled by hardware. However, software is used to select a mode
prior to arming the X-ray detector. With the vTrigger mode selected,
vsp_acquisition_prepare()
is called, to arm the X-ray detector in that mode. vTrigger modes are set up in the detector
configuration file prior to use. These configuration file modes give the OEM the benefit of not
requiring any hardware synchronization with the generator. A vTrigger acquisition mode
utilizes the X-ray detector’s hardware to sense when X-rays are exposed to the X-ray detector (i.e.
Automatic Exposure Detection). Once X-rays have been detected, vTrigger automatically begins
integration followed by image readout.
For modes that use vTrigger, only the Prepare command is used to arm the X-ray detector, but
the Trigger command is not needed since the X-ray detector is in a vTrigger mode that uses auto-
matic exposure detection. vTrigger modes will send the same notifications as those in the radio-
graphic mode (e.g.
exposure on
,
exposure off, transfer end
, etc.)
Note
The minimum dose to initiate an exposure depends on system integrator
requirements.
The sequences for integration and readout are the same as depicted in
Figure 57
and
Figure 58
.
