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BIOMEDICAL PAPER Design, implementation and accuracy of a prototype for medical augmented reality (2004)
BibTeX
@MISC{P04biomedicalpaper,
author = {Abhilash P and Mohammad-reza Siadat and Greg Auner},
title = {BIOMEDICAL PAPER Design, implementation and accuracy of a prototype for medical augmented reality},
year = {2004}
}
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Abstract
Objective: This paper is focused on prototype development and accuracy evaluation of a medical Augmented Reality (AR) system. The accuracy of such a system is of critical importance for medical use, and is hence considered in detail. We analyze the individual error contributions and the system accuracy of the prototype. Materials and Methods: A passive articulated arm is used to track a calibrated end-effector-mounted video camera. The live video view is superimposed in real time with the synchronized graphical view of CT-derived segmented object(s) of interest within a phantom skull. The AR accuracy mostly depends on the accuracy of the tracking technology, the registration pro-cedure, the camera calibration, and the image scanning device (e.g., a CT or MRI scanner). Results: The accuracy of the Microscribe arm was measured to be 0.87 mm. After mounting the camera on the tracking device, the AR accuracy was measured to be 2.74 mm on average (standard deviation 0.81 mm). After using data from a 2-mm-thick CT scan, the AR error remained essentially the same at an average of 2.75 mm (standard deviation 1.19 mm). Conclusions: For neurosurgery, the acceptable error is approximately 2–3 mm, and our prototype approaches these accuracy requirements. The accuracy could be increased with a higher-fidelity tracking system and improved calibration and object registration. The design and methods of this prototype device can be extrapolated to current medical robotics (due to the kinematic similarity) and neuronavigation systems.
Keyphrases
medical augmented reality biomedical paper design ar accuracy standard deviation live video view higher-fidelity tracking system 2-mm-thick ct scan registration pro-cedure neuronavigation system camera calibration prototype development medical use synchronized graphical view tracking device real time acceptable error ar error prototype device phantom skull calibrated end-effector-mounted video camera passive articulated arm accuracy evaluation microscribe arm critical importance individual error contribution object registration mri scanner current medical robotics system accuracy kinematic similarity accuracy requirement
