RESUMO
PURPOSE: The training of liver surgeons depends on local conditions such as the specialization of the clinic, the spectrum of cases, and the instructing surgeons. We present the LiverSurgeryTrainer a software application to support the training of prospective surgeons in preoperative decision making. METHODS: The LiverSurgeryTrainer visualizes radiological images, volumetric information, and interactive 3D models of patients' liver anatomy. In addition, it provides special interaction techniques and tools to perform individual resections on the training data. To assess the correctness of decisions made by the learner, comments and decisions from experienced liver surgeons are provided for each case. To complete the case, additional material concerning the actual surgery (e.g., videos, reports) is presented. The application workflow is derived from a scenario-based design process and is based on an instructional design model. RESULTS: The LiverSurgeryTrainer was evaluated in several steps. A formative usability evaluation identified workflow and user interface flaws that were resolved in further development process. A summative evaluation shows the improvement of the LiverSurgeryTrainer in nearly all analyzed aspects. First results of a learning success evaluation show that learners experience a learning effect. CONCLUSION: Our training system allows surgeons to train procedures and interaction techniques for computer-based planning of liver interventions. The evaluations showed acceptance and usability.
Assuntos
Educação Médica Continuada/métodos , Hepatectomia/educação , Imageamento Tridimensional , Modelos Educacionais , Radiologia/educação , Cirurgia Assistida por Computador/educação , Interface Usuário-Computador , Adulto , Hepatectomia/métodos , Humanos , Estudos ProspectivosRESUMO
The LiverAnatomyExplorer is a real-time surgical teaching tool based on state-of-the-art Web technologies such as SVG (Scalable Vector Graphics), X3D (Extensible3D), and WebGL (Web Graphics Library). Unlike other medical e-learning systems, the LiverAnatomyExplorer combines traditional clinical 2D imagery with interactive Web-based 3D models derived from patient-specific image data. The tool is enhanced by surgical videos, a self-assessment tool, and an online authoring tool with which instructors can manage the presented case studies and create multiple-choice quizzes.
