Determining the contribution of visual and haptic cues during compliance discrimination in the context of minimally invasive surgery

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dc.contributor.author Fakhoury, Evan
dc.date.accessioned 2017-11-20T08:10:23Z
dc.date.available 2017-11-20T08:10:23Z
dc.date.copyright 2015 en_US
dc.date.issued 2017-11-20
dc.identifier.uri http://hdl.handle.net/10725/6641
dc.description.abstract While minimally invasive surgery is replacing open surgery in an increasing number of surgical procedures, it still poses risks such as unintended tissue damage due to reduced visual and haptic feedback. Surgeons assess tissue health by analysing mechanical properties such as compliance. The literature shows that while both types of feedback contribute to the final percept, visual information is dominant during compliance discrimination tasks. The magnitude of that contribution, however, was never quantitatively determined. To determine the effect of the type of visual feedback on compliance discrimination, a psychophysical experiment was set up using different combinations of direct and indirect visual and haptic cues. Results reiterated the significance of visual information and suggested a visio-haptic cross-modal integration. Consequently, to determine which cues contributed most to visual feedback, the impact of force and position on the ability to discriminate compliance using visual information only was assessed. Results showed that isolating force and position cues during indentation enhanced performance. Furthermore, under force and position constraints, visual information was shown to be sufficient to determine the compliance of deformable objects. A pseudo-haptic feedback system was developed to quantitatively determine the contribution of visual feedback during compliance discrimination. A psychophysical experiment showed that the system realistically simulated viscoelastic behaviour of compliant objects. Through a magnitude estimation experiment, the pseudo-haptic system was shown to be successful at generating haptic sensations of compliance during stimuli indentation only by modifying the visual feedback presented to participants. This can be implemented in research and educational facilities where advanced force feedback devices are inaccessible. Moreover, it can be incorporated into virtual reality simulators to enhance force ranges. Future work will assess the value of visual cue augmentation in more complicated surgical tasks. en_US
dc.language.iso en en_US
dc.title Determining the contribution of visual and haptic cues during compliance discrimination in the context of minimally invasive surgery en_US
dc.type Thesis en_US
dc.author.degree PHD en_US
dc.author.school SOE en_US
dc.author.idnumber 200501678 en_US
dc.author.department Industrial And Mechanical Engineering en_US
dc.description.embargo N/A en_US
dc.description.physdesc xi, 150 p: ill en_US
dc.author.advisor Henson, Brian en_US
dc.keywords Surgical technologies en_US
dc.keywords Minimally invasive surgery en_US
dc.keywords Robotic assisted laparoscopic surgery en_US
dc.keywords Compliance discrimination en_US
dc.keywords Psychophysics en_US
dc.keywords Haptic perception en_US
dc.keywords Visual feedback en_US
dc.description.bibliographiccitations Includes bibliographical references en_US
dc.identifier.ctation Fakhoury, E. (2015). Determining the Contribution of Visual and Haptic Cues during Compliance Discrimination in the Context of Minimally Invasive Surgery (Doctoral dissertation, University of Leeds). en_US
dc.author.email evan.fakhoury@lau.edu en_US
dc.identifier.tou http://libraries.lau.edu.lb/research/laur/terms-of-use/articles.php en_US
dc.identifier.url http://etheses.whiterose.ac.uk/12557/ en_US
dc.publisher.institution The University of Leeds en_US
dc.author.affiliation Lebanese American University en_US

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