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    Evaluating drilling and suctioning technique in a mastoidectomy simulator.

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    This paper presents several new metrics related to bone removal and suctioning technique in the context of a mastoidectomy simulator. The expertise with which decisions as to which regions of bone to remove and which to leave intact is evaluated by building a Na ve Bayes classifier using training data from known experts and novices. Since the bone voxel mesh is very large, and many voxels are always either removed or not removed regardless of expertise, the mutual information was calculated for each voxel and only the most informative voxels used for the classifier. Leave-out-one cross validation showed a high correlation of calculated expert probabilities with scores assigned by instructors. Additional metrics described in this paper include those for assessing smoothness of drill strokes, proper drill burr selection, sufficiency of suctioning, two-handed tool coordination, and application of appropriate force and velocity magnitudes as functions of distance from critical structures.

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    Description

    Title : Evaluating drilling and suctioning technique in a mastoidectomy simulator.
    Author(s) : Christopher Sewell, Dan Morris, Nikolas H Blevins, Federico Barbagli, Kenneth Salisbury
    Abstract : This paper presents several new metrics related to bone removal and suctioning technique in the context of a mastoidectomy simulator. The expertise with which decisions as to which regions of bone to remove and which to leave intact is evaluated by building a Na ve Bayes classifier using training data from known experts and novices. Since the bone voxel mesh is very large, and many voxels are always either removed or not removed regardless of expertise, the mutual information was calculated for each voxel and only the most informative voxels used for the classifier. Leave-out-one cross validation showed a high correlation of calculated expert probabilities with scores assigned by instructors. Additional metrics described in this paper include those for assessing smoothness of drill strokes, proper drill burr selection, sufficiency of suctioning, two-handed tool coordination, and application of appropriate force and velocity magnitudes as functions of distance from critical structures.
    Subject : unspecified
    Area : Other
    Language : English
    Year : 2007

    Affiliations Microsoft Research
    Journal : Studies In Health Technology And Informatics
    Volume : 125
    Pages : 427-432
    Url : http://www.scopus.com/inward/record.url?eid=2-s2.0-34248550438&partnerID=40

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    Dan's Peer Evaluation activity

    Downloads 4
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    • Habiba Hassan Wassef, Senior professional, Independent international expert, United Nations, WHO, National Coordinator for the 7th European Framework Research Programme, National Research Center in Cairo, Egypt.

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