PROTEUS XR/a
GE MEDICAL SYSTEMS
Operator Manual
REV 11
DIRECTION 2259724-100
5-7
5-1-5 AEC (Automatic Exposure Control) Operation – Optional Feature
The Proteus XR/a generator supports three field Ion Chambers in the
table or wall stand bucky/cassette tray for all radiographic applications.
AEC is an optional feature. The AEC function allows the operator to
select the automatic radiographic exposure control by corresponding
field area selection.
The following fields are supported by the system console:
TABLE 5-1
AEC AREA(S) SELECTED
AREA(S)
SELECTED
APPLICATION PATIENT
POSITIONING
None
AEC is off and the operator is
taking a manual exposure
No.2 Only
To control exposure for an area of
interest that is at center of the X-
Ray field.
Position the area of
interest in the X-Ray
field center
No.1 Only
To control exposure for an area of
interest that is in the upper left
quadrant of the full sized
radiograph (Note 1)
Position the area of
interest in the upper
left quadrant of the X-
Ray field
No.3 Only
To control exposure for an area of
interest that is in the upper right
quadrant of the full sized
radiograph (Note 1)
Position the area of
interest in the upper
right quadrant of the
X-Ray field
No.1 and No.3
together
To control exposure for two
symmetrical parts of the body
such as the lungs or kidneys
(Note 2)
Position the area of
interest to be aligned
with the No.1 and
No.3 sensing areas.
To control exposure for two areas
of interest that are in the upper
left and center of the X-Ray field
Position the area of
interest to be aligned
with the No.1 and
No.2 sensing areas.
To control exposure for two areas
of interest that are in the upper
right and center of the X-Ray field
Position the area of
interest to be aligned
with the No.2 and
No.3 sensing areas.
All areas
together
To control exposure to allow the
average density of the whole
radiograph to approximate the
value of the preselected density.
Position the area of
interest within the
boundaries of the X-
Ray field.
Note:
1. Areas No.1 and/or No.3 are to be used with a full size field
of 10
″×
12
″
(254mm
×
305mm) or larger.
2. As area No.2 is not selected for this application, the
vertebral column should not affect the exposure,
providing that the patient is correctly positioned.
FOR
TRAINING
PURPOSES
ONLY!
NOTE:
Once
downloaded,
this
document
is
UNCONTROLLED,
and
therefore
may
not
be
the
latest
revision.
Always
confirm
revision
status
against
a
validated
source
(ie
CDL).
