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Quantitative evaluation of stereoscopic augmented reality visualization using an optical see-through head-mounted display

Żuk Magdalena, Majak Marcin, Szczur Izabela, Popek Michał, Świątek-Najwer Ewelina

Acta of Bioengineering and Biomechanics

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2023

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Vol. 25, no. 1

173--182

EN

: The authors of the current study aimed to propose a calibration method for accurate augmented reality visualisation using an optical see-through head-mounted display, and to qualitatively evaluate visualisation accuracy for the application in computer assisted surgery. Methods: An adaptation of stereo single-point active alignment method was proposed as the calibration procedure together with verification. Three tests were performed: display of points in 3D space, on the plane and on the surface of a skull phantom on inexperience users (5 participants) and experienced users (17 participants). Results: The highest accuracy of visualization was obtained for skull phantom visualisation for an inexperienced user (3.00 mm, std 0.75 mm), while the lowest accuracy was obtained in a 3D visualisation test for an inexperienced user (22.95 mm, std 18.04 mm). The largest error was related to the depth component and amounted to 18.49 mm, std 18.10 mm for an inexperienced user. Conclusions: It is possible to achieve relatively high visualisation accuracy (less than 5 mm for visualisation in space) for selected users but providing it for the group of inexperienced users seems to remain a major challenge. The accuracy of point indication can be substantially and statistically significantly increased by visualising objects on surfaces. The proposed methods and obtained results can serve as a basis for further implementation of augmented reality visualisation on an optical see-through head-mounted display in applications requiring high-quality augmented reality guidance of manual tasks.

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Augmented reality visualization for aiding biopsy procedure according to computed tomography based virtual plan

Majak Marcin, Żuk Magdalena, Świątek-Najwer Ewelina, Popek Michał, Pietruski Piotr

Acta of Bioengineering and Biomechanics

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2021

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Vol. 23, no. 2

81--89

EN

Purpose: The purpose of this study was to develop and verify an intraoperative module for supporting navigated biopsy procedures using optical see-through head-mounted display (HMD). Methods: Biopsy procedure including entry and endpoints of needle insertion was planned preoperatively having regard to the resection region segmentation and safety margin definition. Biopsy procedures were performed by two users using an intraoperative optical navigation module on a specially prepared brain phantom. Two visualization techniques were compared: an accurate augmented reality one, where a virtual plan is superimposed onto surgical field by using optical see-through HMD together with personalized calibration method and visualization on the external display. Results: Averaged errors from 24 trials using external display were 2.04 ± 0.83 mm for the first user and 2.69 ± 1.11 mm for the second one, while applying HMD 2.50 ± 0.93 mm (the first user) and 2.17 ± 0.82 mm (the second user), respectively. Conclusions: Proper usage of HMD visualization preceded by the personalized calibration allows the user to perform navigated biopsy procedure with comparable accuracy to its equivalent with the external display. Additionally, augmented reality visualization improves ergonomics and enables focusing on the surgical field without losing a direct line of sight with the field of view as it happens for external displays. However, ensuring high accuracy of augmented reality visualization still requires proper calibration and some user experience, which is challenging.

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Stan techniki nawigacji medycznej w obszarach chirurgii wspomaganej komputerowo

Kozak J.

Inżynier i Fizyk Medyczny

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2012

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Vol. 1, nr 3

129--134

PL

Tendencje chirurgii, zarówno w technikach minimalnie inwazyjnych, jak opierających się na robotyce, narzucają stosowanie metod wspomagających chirurga w wizualizacji pola operacyjnego i orientacji przestrzennej narzędzi podczas zabiegu. Metody te wymagają rzetelnej oceny. Przykładami technologii medycznych, które muszą podlegać takiej ocenie, są chirurgia wspomagana komputerowo stosująca tomografię komputerową lub ultrasonografię oraz endoskopia, zarówno manualna, jak i zrobotyzowana. Technologie wspomagania chirurgii mogą być nieocenioną pomocą dla chirurga. Telemanipulator może służyć przykładowo do obsługi narzędzi i głowicy USG, które umożliwiają precyzyjne przeprowadzenie biopsji. Nawigowane USG we wspomaganiu różnych zabiegów operacyjnych pozwala wyeliminować niedokładności wynikające z przemieszczania się operowanej tkanki podczas zabiegu. Dzięki połączeniu telemanipulatora z nawigowanym USG w jeden system można znacząco zwiększyć dokładność orientacji przestrzennej narzędzi podczas zabiegu.

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Computer aided surgery

Dohi T., Matsumiya K., Masamune K.

Biocybernetics and Biomedical Engineering

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2007

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Vol. 27, no. 1-2

105-110

EN

In providing surgical treatment in the 21st century, it is necessary to use various advanced technologies: surgical robots, three-dimensional medical images, computer graphics, computer simulation technology and others. Three-dimensional medical image for surgical operation provides surgeons with advanced vision. A surgical robot provides surgeons with advanced hand, but it is not a machine to do the same action of the surgeon using scissors or a scalpel. The advanced vision and hands available to surgeons are creating new fields of surgery, which are minimally invasive surgery, non-invasive surgery, virtual reality microsurgery, tele-surgery, fetus surgery, neuro-informatics surgery and other areas of surgery developing in the 21st century.