[KSCI] Korea Science Citation Index Service

http://dx.doi.org/10.5143/JESK.2017.36.1.37

Development and Usability Testing of a User-Centered 3D Virtual Liver Surgery Planning System

Yang, Xiaopeng (POSTECH, Department of Industrial and Management Engineering)
Yu, Hee Chul (Chonbuk National University Medical School, Department of Surgery)
Choi, Younggeun (POSTECH, Department of Industrial and Management Engineering)
Yang, Jae Do (Chonbuk National University Medical School, Department of Surgery)
Cho, Baik Hwan (Chonbuk National University Medical School, Department of Surgery)
You, Heecheon (POSTECH, Department of Industrial and Management Engineering)

Publication Information

Journal of the Ergonomics Society of Korea / v.36, no.1, 2017 , pp. 37-52 More about this Journal

Abstract

Objective: The present study developed a user-centered 3D virtual liver surgery planning (VLSP) system called Dr. Liver to provide preoperative information for safe and rational surgery. Background: Preoperative 3D VLSP is needed for patients' safety in liver surgery. Existing systems either do not provide functions specialized for liver surgery planning or do not provide functions for cross-check of the accuracy of analysis results. Method: Use scenarios of Dr. Liver were developed through literature review, benchmarking, and interviews with surgeons. User interfaces of Dr. Liver with various user-friendly features (e.g., context-sensitive hotkey menu and 3D view navigation box) was designed. Novel image processing algorithms (e.g., hybrid semi-automatic algorithm for liver extraction and customized region growing algorithm for vessel extraction) were developed for accurate and efficient liver surgery planning. Usability problems of a preliminary version of Dr. Liver were identified by surgeons and system developers and then design changes were made to resolve the identified usability problems. Results: A usability testing showed that the revised version of Dr. Liver achieved a high level of satisfaction ( $6.1{\pm}0.8$ out of 7) and an acceptable time efficiency ( $26.7{\pm}0.9 min$ ) in liver surgery planning. Conclusion: Involvement of usability testing in system development process from the beginning is useful to identify potential usability problems to improve for shortening system development period and cost. Application: The development and evaluation process of Dr. Liver in this study can be referred in designing a user-centered system.

Keywords

Virtual liver surgery planning system; User-Centered system design; Usability testing;

Citations & Related Records

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