Hologic Brevera - How to Perform Gain Calibration

Brevera Breast Biopsy System User Guide
Chapter 4: User Interface - Imaging Display
Page 58 MAN-04303-002 Revision 006
4.4.4 How to Do the Gain Calibration
Do the Gain Calibration monthly and when artifacts are seen.
Note
When the system shows the Gain Calibration message, do the calibration before you
proceed with using the system. If you do the Gain Calibration at a different time, access
the procedure through the Admin screen.
1. Select Yes to do the calibration now. If you select No, the system shows the Select
Patient screen.
2. If you select to do the calibration now, you are prompted to select an Automatic Gain
Calibration mode. Select Yes for Automatic Gain Calibration or No for Manual Gain
Calibration.
3. Make sure that there are no items in the tissue filter drawer and that the surface of
the x-ray imaging area is clean. Close the tissue filter drawer. Select OK to begin.
4. For Automatic Gain Calibration, the system takes four images.
Note
In the event that the system is unable to complete an Automatic Gain Calibration, the
user can continue with Manual Gain Calibration. To continue calibration, use the
manual x-ray function until four images are acquired. The system can complete Gain
Calibration using the combination of automatically acquired and manually acquired
images.
5. After four images have been acquired, select the Complete Calibration button to
start the calibration. When the Gain Calibration is finished, a message about
successful completion appears. Select OK to return to the previous screen.
For Manual Gain Calibration:
1. Make sure that there are no items in the tissue filter drawer and that the surface of
the x-ray imaging area is clean. Close the tissue filter drawer. Press OK to begin.
2. Press the X-ray button.
3. Wait for the system to return to the Ready state.
4. Repeat steps 2 and 3 until you acquire four images.
5. After four images have been acquired, select the Complete Calibration button to
start the calibration. When the Gain Calibration is finished, a message about
successful completion appears. Select OK to return to the previous screen.