Hologic Affirm, User Manual

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Affirm User Guide
Chapter 4: How to Use the System
MAN-03209 Revision 005 Page 35
4.3.2 C-Arm Stereo Modes
Acquire the stereo images in either the Auto C-Arm Stereo Mode or the Manual C-Arm
Stereo Mode. Make the C-Arm Stereo Mode selection at the Acquisition Workstation
(refer to
How to Select the C-Arm Stereo Mode for Image Acquisition on page 36).
C-Arm Rotation in the C-Arm Stereo Modes
The mechanics of C-arm rotation for stereotactic image acquisition is different in Auto and
Manual C-Arm Stereo Modes.
Note C-arm vertical movement and rotation are disabled when
compression force is applied. A service engineer can
configure the lockout force from 22 Newtons (5 pounds) to
45 Newtons (10 pounds).
In Auto C-Arm Stereo Mode
In the Auto C-Arm Stereo Mode, the Target Guidance screen does not show the C-Arm
Stereo Mode button. In the Auto C-Arm Stereo mode, the system automatically lets the
C-arm move separately from the Tube Arm to acquire the stereo images. When the X-ray
button is pressed to start stereo image acquisition, the Tube Arm automatically moves to
the first 15° angle, acquires the image, rotates to the opposite 15° angle and acquires that
image.
Note The option to position the Tube Arm for the first stereo
image is in the System Status menu (refer to
How to Select the
C-Arm Stereo Mode for Image Acquisition on page 36). The
Tube Arm automatically rotates to the selected 15° angle.
This option operates in both C-Arm Stereo modes.