Troubleshooting on Combined 2D/3D Stereotactic/Tomosynthesis Breast Biopsy Units
The traditionally taught principles for recognition and correction of guidance errors on the prone stereotactic biopsy unit are not directly applicable to the new combined 2D/3D upright breast biopsy units. As combined 2D/3D upright biopsy units become increasingly utilized, it is important to recognize the different appearance of targeting errors (x-errors, y-errors and z-errors) using this technique and to know methods to manually correct for these errors.
1.Recognize the appearance of various guidance errors on combined 2D/3D upright biopsy units
2.Manual correction of x-errors, y-errors and z-errors
3.Understand the method to retarget as well as benefits and drawbacks of retargeting
Understanding lesion location and approach during biopsy:
•Review diagnostic mammogram to determine optimal approach for biopsy.
•Compare lesion coordinates and depth with that expected from diagnostic mammograms at the time of targeting.
•Review information given in the mammography unit console to determine feasibility of biopsy
•Think of the trough opening pointing toward the chest wall as your reference for 12 o’clock.
•Is the target to the right or left of the expected area of sampling?
•Is the target closer to the nipple or toward the chest wall?