This body of work documents the developed of a proof of concept augmented realityguided computer assisted orthopaedic surgery system – ARgCAOS.After initial investigation a visible-spectrum single camera tool-mounted trackingsystem based upon fiducial planar markers was implemented. The use ofvisible-spectrum cameras, as opposed to the infra-red cameras typically used bysurgical tracking systems, allowed the captured image to be streamed to a display inan intelligible fashion. The tracking information defined the location of physicalobjects relative to the camera. Therefore, this information allowed virtual models tobe overlaid onto the camera image. This produced a convincing augmentedexperience, whereby the virtual objects appeared to be within the physical world,moving with both the camera and markers as expected of physical objects.Analysis of the first generation system identified both accuracy and graphicalinadequacies, prompting the development of a second generation system. This toowas based upon a tool-mounted fiducial marker system, and improved performanceto near-millimetre probing accuracy. A resection system was incorporated into thesystem, and utilising the tracking information controlled resection was performed,producing sub-millimetre accuracies.Several complications resulted from the tool-mounted approach. Therefore, a thirdgeneration system was developed. This final generation deployed a stereoscopicvisible-spectrum camera system affixed to a head-mounted display worn by the user.The system allowed the augmentation of the natural view of the user, providingconvincing and immersive three dimensional augmented guidance, with probing andresection accuracies of 0.55±0.04 and 0.34±0.04 mm, respectively.
| Date of Award | 14 Sept 2016 |
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| Original language | English |
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| Awarding Institution | - University Of Strathclyde
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| Sponsors | EPSRC (Engineering and Physical Sciences Research Council) |
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