Chapter 10: Image Acquisition
5495975-1EN Rev.9
10-8
© 2013-2017 General Electric Company. All rights reserved.
Patient Dose Reporting
Estimates of patient dose are calculated after each acquisition and optionally displayed as part of image
annotations. This information is also stored in the DICOM header of each image (the RAW image and its
corresponding PROCESSED image) and cannot be edited or modified by the operator.
Entrance Dose (unit: mGy) is an estimate of entrance dose (air-kerma) at a distance X in front of the
wallstand cover or above the tabletop, depending on which receptor was used for acquisition. The
default X is 25cm (~ 10 in) but can be modified to site preference by service.
Entrance dose is stored in DICOM header tag (0018,1405) in units of µGy.
Dose Area Product or DAP (unit: dGy
•
cm
2
) is the entrance dose estimate multiplied by the field-of-
view area at the corresponding distance from receptor.
DAP is stored in DICOM header tag (0018,115e) in units of dGy
•
cm
2
.
Note:
The patient dose estimates are accurately calculated using (1) current system and technique set-
tings and (2) measured values collected during system install/calibration. They are not actual per-
image measurements of patient dose.
[WARM TUBE]
Displays the tube warming status. When the yellow alert
icon is present, the tube must be warmed before images
may be acquired.
Note:
Because the tube warming procedure produces x-
rays, it cannot be performed when an exam is
open. If the tube must be warmed before the
exam can begin, suspend the exam (refer to
for more information) and remove
the patient and any others from the room before
warming the tube.
Chapter 4: General Information-Tube Warm Up
for more information.
[EXPOSE HOLD]
Appears when there is some condition that prevents an x-
ray from being taken.
Click the button to view a list of all errors and interlocks
that are preventing the exposure. The items are removed
from the list as they are corrected. The button disappears
when all errors and interlocks are corrected.
[Secondary Technique Display]
Displays the technique values that the generator has
loaded.
Note:
Could be the previous exposure techniques per-
formed.
Table 10-1
Image Acquisition functions
Function
Description
