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Learning Curve for Stereotactic Breast Biopsy

How Many Cases Are Enough?

Laura Liberman1, Catherine L. Benton, D. David Dershaw, Andrea F. Abramson, Linda R. LaTrenta and Elizabeth A. Morris

1 All authors: Breast Imaging Section, Department of Radiology, Memorial Sloan-Kettering Cancer Center, 1275 York Ave., New York, NY 10021.



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  		Fig. 1A. —Bar graphs show learning curves for lesions that underwent stereotactic 14-gauge automated core biopsy. Data reflect cumulative technical success rate for first n cases of each radiologist, with all radiologists considered as a group. Learning curve for all lesions. Note lower initial technical success rate and plateau reached at 15-20 cases.

 


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  		Fig. 1B. —Bar graphs show learning curves for lesions that underwent stereotactic 14-gauge automated core biopsy. Data reflect cumulative technical success rate for first n cases of each radiologist, with all radiologists considered as a group. Learning curve for calcifications. Note low initial technical success rate and steep slope of curve.

 


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  		Fig. 1C. —Bar graphs show learning curves for lesions that underwent stereotactic 14-gauge automated core biopsy. Data reflect cumulative technical success rate for first n cases of each radiologist, with all radiologists considered as a group. Learning curve for masses. Initial technical success was higher for masses than for calcifications, and slope is less steep.

 


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  		Fig. 2A. —Bar graphs show learning curves for lesions that had stereotactic, 11-gauge vacuum-assisted biopsy. Data reflect cumulative technical success rate for first n cases of each radiologist, with all radiologists considered as a group. Learning curve for all lesions. Note initial technical success rate is higher for 11-gauge vacuum-assisted biopsy than for 14-gauge automated core biopsy (Fig. 1A), but technical success still improves with experience.

 


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  		Fig. 2B. —Bar graphs show learning curves for lesions that had stereotactic, 11-gauge vacuum-assisted biopsy. Data reflect cumulative technical success rate for first n cases of each radiologist, with all radiologists considered as a group. Learning curve for calcifications. Note low initial technical success rate and steep slope of curve.

 


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  		Fig. 2C. —Bar graphs show learning curves for lesions that had stereotactic, 11-gauge vacuum-assisted biopsy. Data reflect cumulative technical success rate for first n cases of each radiologist, with all radiologists considered as a group. Learning curve for masses. Note high initial technical success with no appreciable curve.

 

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