3Dimensions System User Guide
Chapter 6: Images
Page 70
MAN-05085-002 Revision 002
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6.2
How to Set the Exposure Parameters
6.2.1
Select the Image Acquisition Mode (Tomosynthesis Option)
x
Standard
For routine Tomosynthesis screening procedures
x
Enhanced
For diagnostic Tomosynthesis views
Warning:
Enhanced acquisition mode with combo mode imaging (DM + BT) can
produce radiation dose that is higher than the MQSA screening limit of 3.0
mGy and therefore should only be used in diagnostic evaluation.
6.2.2
Select the Exposure Mode
Use the Automatic Exposure Control modes (AEC) to let the system control the exposure
techniques. AEC modes are available from 20-49 kV.
x
Manual
The user selects the kV, mAs, Focal Spot, and Filter.
x
AEC: Auto-Time The user selects the kV, Focal Spot, and Filter. The system
selects the mAs.
x
AEC: Auto-kV
The user selects the Focal Spot. The system selects the kV,
mAs, and Filter (Rhodium).
x
AEC: Auto-Filter The user selects the Focal Spot. The system selects the kV,
mAs, and Filter.
6.2.3
How to Use the AEC Sensor
The AEC Sensor has seven manual positions and an automatic position. The manual
positions start at the chest wall edge (position 1) and reach toward the nipple edge
(position 7). The automatic position selects two regions within an area that extends from
the chest wall to the nipple.
Use the plus (+) and minus (-) keys on the Compression Device or in the AEC Sensor area
of the screen to change the sensor position. You can select Auto AEC to allow the system
to calculate the best exposure for the breast.
