Design and Evaluation of a System for Microscope-Assisted Guided Interventions (MAGI)

Edwards, Philip; King, Andrew P.; Maurer, Calvin R.; Cunha, Darryl A. de; Hawkes, David J.; Hill, Derek L. G.; Gaston, R; Fenlon, Michael R.; Chandra, Subhash; Strong, Anthony J.; Chandler, Christopher; Richards, A. Glenn; Gleeson, M. J.

doi:10.1007/10704282_91

Cited by 25 publications

(11 citation statements)

References 12 publications

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“…This visualization technique is generally referred to as augmented reality (AR). The means to visualise such data included operating microscopes (Roberts et al 1986;Shahidi et al 1995;Edwards et al 1999;King et al 1999;Edwards et al 2000), half-transparent mirrors used as monitors (Gleason et al 1994;Blackwell et al 1998), head-mounted displays (HMD) (Barnett et al 1995;Wagner et al 1995Wagner et al , 1996Birkfellner et al 2001a;Maurer et al 2001) or other surgical instruments (Berger & Shin 1999). Computer-aided surgical navigation techniques are already widely established in craniomaxillofacial surgery (Hassfeld & Muhling 2001).…”

mentioning

confidence: 99%

Computer‐enhanced stereoscopic vision in a head‐mounted display for oral implant surgery

Wanschitz

Birkfellner

Figl

et al. 2002

Clinical Oral Implants Res

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We developed a head-mounted display (HMD) with integrated computer-generated stereoscopic projection of target structures and integrated it into visit, a specific oral implant planning and navigation software. The HMD is equipped with two miniature computer monitors that project computer-generated graphics stereoscopically into the optical path. Its position is tracked by the navigation system's optical tracker and target structures are displayed in their true position over the operation site. In order to test this system's accuracy and spatial perception of the viewer, five interforaminal implants in three dry human mandibles were planned with visit and executed using the stereoscopic projection through the HMD. The deviation between planned and achieved position of the implants was measured on corresponding computed tomography (CT) scan images recorded post-operatively. The deviation between planned and achieved implant position at the jaw crest was 0.57 +/- 0.49 mm measured from the lingual, and 0.58 +/- 0.4 mm measured from the buccal cortex. At the tip of the implants the deviation was 0.77 +/- 0.63 mm at the lingual and 0.79 +/- 0.71 mm at the buccal cortex. The mean angular deviation between planned and executed implant position was 3.55 +/- 2.07 degrees. The present in vitro experiment indicates that the concept of preoperative planning and transfer to the operative field by an HMD allows us to achieve an average precision within 1 mm (range up to 3 mm) of the implant position and within 3 degrees deviation for the implant inclination (range up to 10 degrees ). Control during the drilling procedure is significantly improved by stereoscopic vision through the HMD resulting in a more accurate inclination of the implants.

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mentioning

confidence: 99%

Computer‐enhanced stereoscopic vision in a head‐mounted display for oral implant surgery

Wanschitz

Birkfellner

Figl

et al. 2002

Clinical Oral Implants Res

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“…tumours) from preoperative patient images with live video images of the patient. For ear-nose-throat and neurosurgery, Edwards et al [3] developed microscope-assisted guided intervention, a system that allowed for stereo projection of virtual images into the microscope. Varioscope AR was a custom built head-mounted operating microscope for neurosurgery that allowed for virtual objects to be presented to the viewer using video graphics array displays.…”

Section: Ar In Ignsmentioning

confidence: 99%

Quantifying attention shifts in augmented reality image‐guided neurosurgery

Léger

Drouin

Collins

et al. 2017

Healthc. technol. lett.

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Image-guided surgery (IGS) has allowed for more minimally invasive procedures, leading to better patient outcomes, reduced risk of infection, less pain, shorter hospital stays and faster recoveries. One drawback that has emerged with IGS is that the surgeon must shift their attention from the patient to the monitor for guidance. Yet both cognitive and motor tasks are negatively affected with attention shifts. Augmented reality (AR), which merges the realworld surgical scene with preoperative virtual patient images and plans, has been proposed as a solution to this drawback. In this work, we studied the impact of two different types of AR IGS set-ups (mobile AR and desktop AR) and traditional navigation on attention shifts for the specific task of craniotomy planning. We found a significant difference in terms of the time taken to perform the task and attention shifts between traditional navigation, but no significant difference between the different AR set-ups. With mobile AR, however, users felt that the system was easier to use and that their performance was better. These results suggest that regardless of where the AR visualisation is shown to the surgeon, AR may reduce attention shifts, leading to more streamlined and focused procedures.

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“…Such systems work by showing the surgeon a processed preoperatively acquired image overlaid on the visible patient anatomy. The idea of using AR to aid surgery is not new, with various systems having been proposed [1][2][3][4][5], to name but a few. Systems tailored to the daVinci ® surgical robot have also been proposed [6,7].…”

Section: Image-guided Surgery Systemsmentioning

confidence: 99%

“…Within the literature there are many proposed methods for performing the registration process. To date the most common method is the use use of fiducial markers [1][2][3]5]., use a calibrated and tracked camera together with fiducial markers. Such systems have the advantage that they will function regardless of what anatomy is visible through the laparoscope, i.e.…”

Section: Image Registration For Ar Image-guided Surgerymentioning

confidence: 99%

Design and evaluation of an image‐guidance system for robot‐assisted radical prostatectomy

et al. 2013

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What's known on the subject? and What does the study add? Systems for image guidance during laparoscopic surgery can be broadly defined as systems that enable the surgeon to refer to preoperatively gathered information during the procedure. For a laparoscopic system the preoperative information can be overlaid onto the laparoscopic video screen. Examples of surgical image‐guidance systems and the results of early testing are not uncommon but the technical methodologies used vary widely as do the visualisation methods. This study reports our experience of using an image‐guidance system on 13 patients. Furthermore, we use previously proposed methodology to form a development and evaluation framework specific to image‐guided laparoscopic radical prostatectomy. Finally, we propose that if the system development process is properly designed, it should be possible to correlate system technical parameters with clinical outcomes. We present a possible plot for the key technical parameter of accuracy. Better understanding of this correlation should enable robust development and evaluation of surgical image‐guidance systems to optimise patient outcomes. Objective To implement and test the feasibility of an image‐guidance system for robot‐assisted radical prostatectomy (RARP). Laparoscopic surgical outcomes may be improved through image guidance. However, to demonstrate improved outcomes rigorous evaluation techniques are required. Therefore we also present our work in establishing robust evaluation techniques. Patients and Methods Development work used three cadavers and an anatomy phantom. The system has been used on 13 patients. During surgery the surgeon can refer to the patient's magnetic resonance imaging (collected before the operation) overlaid on the endoscopic video image. The result of the overlay process was measured qualitatively by the surgeon with reference to the desired clinical outcomes. Results The use of the overlay system has not resulted in any measurable change in clinical outcomes. The surgeons found the system to be a useful tool for reference during surgery. A more rigorous evaluation method is proposed that will enable on‐going development. Conclusion Image guidance during RARP is feasible. We propose a series of measures that will improve further development and evaluation.

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Design and Evaluation of a System for Microscope-Assisted Guided Interventions (MAGI)

Cited by 25 publications

References 12 publications

Computer‐enhanced stereoscopic vision in a head‐mounted display for oral implant surgery

Computer‐enhanced stereoscopic vision in a head‐mounted display for oral implant surgery

Quantifying attention shifts in augmented reality image‐guided neurosurgery

Design and evaluation of an image‐guidance system for robot‐assisted radical prostatectomy

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