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Physician Training Requirements in Sonography

How Many Cases Are Needed for Competence?

Barbara S. Hertzberg1, Mark A. Kliewer, James D. Bowie, Barbara A. Carroll, David H. DeLong, Linda Gray and Rendon C. Nelson

1 All authors: Department of Radiology, Box 3808, Rm. 2526, Blue Zone, South, Duke University Medical Center, Durham, NC 27710.



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  		Fig. 1. —Line graph shows improvement in average percentage of anatomy depicted on competency tests administered after involvement in increasing increments of case volumes.

 


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  		Fig. 2. —Line graph shows decrease in average number of total reporting errors per case on competency tests administered after involvement in increasing increments of case volumes.

 


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  		Fig. 3. —Line graph shows decrease in average number of clinically significant reporting errors per case on competency tests administered after involvement in increasing increments of case volumes.

 


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  		Fig. 4. —Line graph shows improvement in average percentage of cases in which residents achieved passing score on competency tests administered after involvement in increasing increments of case volumes.

 


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  		Fig. 5. —Line graph shows percentage of anatomic landmarks depicted by individual residents on competency tests administered after involvement in each of four increments of case volumes. Key on right shows symbols used to depict each of 10 residents (residents A-J). Note striking differences in performance of individual residents.

 


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  		Fig. 6. —Line graph shows average number of total errors per case made by individual residents on competency tests administered after involvement in each of four increments of case volumes. Key on right shows symbols used to depict each of 10 residents (residents A-J).

 


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  		Fig. 7. —Line graph shows average number of clinically significant reporting errors per case made by individual residents on competency tests administered after involvement in each of four increments of case volumes. Key on right shows symbols used to depict each of 10 residents (residents A-J).

 


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  		Fig. 8. —Line graph shows percentage of cases passed by individual residents on competency tests administered after involvement in each of four increments of case volumes. Key on right shows symbols used to depict each of 10 residents (residents A-J). Note that lines demarcating scores that are superimposed on baseline (0% of cases passed) have been offset slightly so they are visible.

 

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