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Automated objective surgical skill assessment in the operating room from unstructured tool motion in septoplasty.

Abstract：

PURPOSE:Previous work on surgical skill assessment using intraoperative tool motion has focused on highly structured surgical tasks such as cholecystectomy and used generic motion metrics such as time and number of movements. Other statistical methods such as hidden Markov models (HMM) and descriptive curve coding (DCC) have been successfully used to assess skill in structured activities on bench-top tasks. Methods to assess skill and provide effective feedback to trainees for unstructured surgical tasks in the operating room, such as tissue dissection in septoplasty, have yet to be developed. METHODS:We proposed a method that provides a descriptive structure for septoplasty by automatically segmenting it into higher-level meaningful activities called strokes. These activities characterize the surgeon's tool motion pattern. We constructed a spatial graph from the sequence of strokes in each procedure and used its properties to train a classifier to distinguish between expert and novice surgeons. We compared the results from our method with those from HMM, DCC, and generic metric-based approaches. RESULTS:We showed that our method--with an average accuracy of 91 %--performs better or equal than these state-of-the-art methods, while simultaneously providing surgeons with an intuitive understanding of the procedure. CONCLUSIONS:In this study, we developed and evaluated an automated approach to objectively assess surgical skill during unstructured task of tissue dissection in nasal septoplasty.

journal_name

Int J Comput Assist Radiol Surg

journal_title

International journal of computer assisted radiology and surgery

authors

Ahmidi N,Poddar P,Jones JD,Vedula SS,Ishii L,Hager GD,Ishii M

doi

10.1007/s11548-015-1194-1

subject

Has Abstract

pub_date

2015-06-01 00:00:00

pages

981-91

issue

6

eissn

1861-6410

issn

1861-6429

journal_volume

10

pub_type

杂志文章

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