Allan J. Hamilton

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Keywords: Fuzzy logic Knowledge elicitation Membership functions Minimally invasive surgery (MIS) Objective assessment Surgical training systems a b s t r a c t Effective training is the key to minimizing the dangers of minimally invasive surgery (MIS). At present, the assessment of laparoscopic skills relies on the expertise of senior surgeons. The(More)
In this paper, a hybrid view application is proposed — a subsystem of a computerized laparoscopic surgery training system. To minimize the potential hazards of laparo-scopic surgery, an assistive training system is being developed. A digital camera and magnetic position sensors are used to detect laparoscopic instruments in the system. The hybrid view is a(More)
BACKGROUND Surgeons performing laparoscopic surgery have strong biases regarding the quality and nature of the laparoscopic video monitor display. In a comparative study, we used a unique computerized sensing and analysis system to evaluate the various types of monitors employed in laparoscopic surgery. METHODS We compared the impact of different types of(More)
To provide appropriate guidance in minimally invasive surgical training (and potentially an additional safety measure in the operating room), we propose a model called a " No-Fly Zone " based on the situational awareness enhancing system. By defining the configuration space of the instrument, a collision free region is defined. If an intrusion occurs into(More)
Minimally invasive procedures are highly effective when performed by well trained surgeons. However, with the subjective nature of surgical training and performance assessment, it is difficult to determine when a trainee surgeon has attained a satisfactory level of competency. We propose a computer-based training and performance assessment system where we(More)
This paper describes a system developed to assist in model-based training of minimally invasive, laparoscopic procedures. The key factor motivating the development of the device called CAST (Computer-Assisted Surgical Trainer) is the need to improve the state-of-the-art in teaching laparoscopy, and ultimately achieve better surgical outcomes. CAST's design(More)
The objective of this study was to determine whether or not a standard definition stereoscopic, 3D display could improve trainees' performance on a standard Fundamentals of Laparoscopy (FLS) task. Thirty-two procedurally naïve volunteers were recruited for the study. Subjects were randomized to begin the trials on either the 3D or 2D display and performed(More)
Introduction: The objective of this study was to determine whether or not a navigation pointer (NP) integrated into a laparoscopic camera and projected onto a surgical display might allow instructors to more easily and precisely direct assistants' instruments to specific sites in a simulated laparoscopic field. Methods: Two hundred forty pins served as(More)