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https://www.readbyqxmd.com/read/28098739/three-dimensional-head-mounted-display-system-for-ophthalmic-surgical-procedures
#1
Marco Dutra-Medeiros, João Nascimento, José Henriques, Sandra Barrão, Ana Fernandes-Fonseca, Nuno Aguiar-Silva, Nuno Moura-Coelho, Victor Ágoas
No abstract text is available yet for this article.
January 16, 2017: Retina
https://www.readbyqxmd.com/read/28092563/effects-of-different-types-of-virtual-reality-display-on-presence-and-learning-in-a-safety-training-scenario
#2
Fabio Buttussi, Luca Chittaro
The increasing availability of head-mounted displays (HMDs) for home use motivates the study of the possible effects that adopting this new hardware might have on users. Moreover, while the impact of display type has bee respectively representative of: (i) desktop VR (a standard desktop monitor), (ii) many setups for immersive VR used in the literature (an HMD with narrow field of view and a 3-DOF tracker), and (iii) new setups for immersive home VR (an HMD with wide field of view and 6-DOF tracker). We assessed effects on knowledge gain, and different self-reported measures (self-efficacy, engagement, presence)...
January 16, 2017: IEEE Transactions on Visualization and Computer Graphics
https://www.readbyqxmd.com/read/28068887/the-use-of-smart-glasses-for-surgical-video-streaming
#3
Takafumi Hiranaka, Yuta Nakanishi, Takaaki Fujishiro, Yuichi Hida, Masanori Tsubosaka, Yosaku Shibata, Kenjiro Okimura, Harunobu Uemoto
Observation of surgical procedures performed by experts is extremely important for acquisition and improvement of surgical skills. Smart glasses are small computers, which comprise a head-mounted monitor and video camera, and can be connected to the internet. They can be used for remote observation of surgeries by video streaming. Although Google Glass is the most commonly used smart glasses for medical purposes, it is still unavailable commercially and has some limitations. This article reports the use of a different type of smart glasses, InfoLinker, for surgical video streaming...
January 1, 2017: Surgical Innovation
https://www.readbyqxmd.com/read/28048975/head-mounted-display-technology-for-low-vision-rehabilitation-and-vision-enhancement
#4
Joshua R Ehrlich, Lauro V Ojeda, Donna Wicker, Sherry Day, Ashley Howson, Vasudevan Lakshminarayanan, Sayoko E Moroi
PURPOSE: To describe the various types of head-mounted display technology, their optical and human factors considerations, and their potential for use in low vision rehabilitation and vision enhancement. DESIGN: Expert perspective. METHODS: An overview of head-mounted display technology by an interdisciplinary team of experts drawing on key literature in the field. RESULTS: Head-mounted display technologies can be classified based on their display type and optical design...
December 31, 2016: American Journal of Ophthalmology
https://www.readbyqxmd.com/read/28039649/or-fire-virtual-training-simulator-design-and-face-validity
#5
Denis Dorozhkin, Jaisa Olasky, Daniel B Jones, Steven D Schwaitzberg, Stephanie B Jones, Caroline G L Cao, Marcos Molina, Steven Henriques, Jinling Wang, Jeff Flinn, Suvranu De
BACKGROUND: The Virtual Electrosurgical Skill Trainer is a tool for training surgeons the safe operation of electrosurgery tools in both open and minimally invasive surgery. This training includes a dedicated team-training module that focuses on operating room (OR) fire prevention and response. The module was developed to allow trainees, practicing surgeons, anesthesiologist, and nurses to interact with a virtual OR environment, which includes anesthesia apparatus, electrosurgical equipment, a virtual patient, and a fire extinguisher...
December 30, 2016: Surgical Endoscopy
https://www.readbyqxmd.com/read/28010995/profiling-subjective-symptoms-and-autonomic-changes-associated-with-cybersickness
#6
Alireza Mazloumi Gavgani, Keith V Nesbitt, Karen L Blackmore, Eugene Nalivaiko
Our aim was to expand knowledge of cybersickness - a subtype of motion sickness provoked by immersion into a moving computer-generated virtual reality. Fourteen healthy subjects experienced a 15-min rollercoaster ride presented via a head-mounted display (Oculus Rift), for 3 consecutive days. Heart rate, respiration, finger and forehead skin conductance were measured during the experiment; this was complemented by a subjective nausea rating during the ride and by Motion Sickness Assessment Questionnaire before, immediately after and then 1, 2 and 3h post-ride...
December 18, 2016: Autonomic Neuroscience: Basic & Clinical
https://www.readbyqxmd.com/read/27997539/the-impact-of-virtual-reality-on-chronic-pain
#7
Ted Jones, Todd Moore, James Choo
The treatment of chronic pain could benefit from additional non-opioid interventions. Virtual reality (VR) has been shown to be effective in decreasing pain for procedural or acute pain but to date there have been few studies on its use in chronic pain. The present study was an investigation of the impact of a virtual reality application for chronic pain. Thirty (30) participants with various chronic pain conditions were offered a five-minute session using a virtual reality application called Cool! Participants were asked about their pain using a 0-10 visual analog scale rating before the VR session, during the session and immediately after the session...
2016: PloS One
https://www.readbyqxmd.com/read/27995901/human-in-the-loop-active-electrosense
#8
Sandra Fang, Michael Peshkin, Malcolm A MacIver
Active electrosense is a non-visual, short range sensing system used by weakly electric fish, enabling such fish to locate and identify objects in total darkness. Here we report initial findings from the use of active electrosense for object localization during underwater teleoperation with a virtual reality (VR) head-mounted display (HMD). The advantage of electrolocating with a VR system is that it naturally allows for aspects of the task that are difficult for a person to perform to be allocated to the computer...
December 20, 2016: Bioinspiration & Biomimetics
https://www.readbyqxmd.com/read/27957404/effects-of-real-world-versus-virtual-environments-on-joint-excursions-in-full-body-reaching-tasks
#9
James S Thomas, Christopher R France, Samuel T Leitkam, Megan E Applegate, Peter E Pidcoe, Stevan Walkowski
Starting from an upright standing posture and reaching for a target that requires some forward bending of the trunk can involve many different configurations of the trunk and limb segments. We sought to determine if configurations of the limb and trunk segments during our standardized full-body reaching tasks were influenced by the visual environment. This paper examined movement patterns of healthy participants ([Formula: see text], eight female and nine male) performing full body reaching tasks to: 1) real-world targets; 2) virtual targets presented on a 3-D television; and 3) virtual targets presented using a head-mounted display...
2016: IEEE Journal of Translational Engineering in Health and Medicine
https://www.readbyqxmd.com/read/27915367/the-virtual-reality-head-mounted-display-oculus-rift-induces-motion-sickness-and-is-sexist-in-its-effects
#10
Justin Munafo, Meg Diedrick, Thomas A Stoffregen
Anecdotal reports suggest that motion sickness may occur among users of contemporary, consumer-oriented head-mounted display systems and that women may be at greater risk. We evaluated the nauseogenic properties of one such system, the Oculus Rift. The head-mounted unit included motion sensors that were sensitive to users' head movements, such that head movements could be used as control inputs to the device. In two experiments, seated participants played one of two virtual reality games for up to 15 min. In Experiment 1, 22% of participants reported motion sickness, and the difference in incidence between men and women was not significant...
December 3, 2016: Experimental Brain Research. Experimentelle Hirnforschung. Expérimentation Cérébrale
https://www.readbyqxmd.com/read/27875160/immersive-collaborative-analysis-of-network-connectivity-cave-style-or-head-mounted-display
#11
Maxime Cordeil, Tim Dwyer, Karsten Klein, Bireswar Laha, Kim Marriott, Bruce H Thomas
High-quality immersive display technologies are becoming mainstream with the release of head-mounted displays (HMDs) such as the Oculus Rift. These devices potentially represent an affordable alternative to the more traditional, centralised CAVE-style immersive environments. One driver for the development of CAVE-style immersive environments has been collaborative sense-making. Despite this, there has been little research on the effectiveness of collaborative visualisation in CAVE-style facilities, especially with respect to abstract data visualisation tasks...
January 2017: IEEE Transactions on Visualization and Computer Graphics
https://www.readbyqxmd.com/read/27857427/generalized-aldis-theorem-for-calculating-aberration-contributions-in-freeform-systems
#12
Bo Chen, Alois M Herkommer
Compact folded imaging systems often require freeform surfaces to correct astigmatic and other off-axis aberrations. However, aberration theory for non-rotational symmetric systems is quite complex and it is especially hard to quantify individual surface aberration contributions. In this paper we develop a matrix method based on the propagation of a differential ray pair, which allows determining the aberration contribution of each individual surface for any ray. We can mathematically prove that the sum of the aberrations is identical to the exact ray-tracing result at the image plane...
November 14, 2016: Optics Express
https://www.readbyqxmd.com/read/27833004/the-effectiveness-of-google-glass-as-a-vital-signs-monitor-in-surgery-a-simulation-study
#13
Mohammed Husnain Iqbal, Abdullatif Aydin, Alexandra Lowdon, Hamza Ibn Ahmed, Gordon H Muir, M Shamim Khan, Prokar Dasgupta, Kamran Ahmed
INTRODUCTION: To assess the effectiveness of the Google GLASS as a vital signs monitor in a surgical setting and identify potential uses. METHODS: This prospective, observational and comparative study recruited novice (n = 24), intermediate (n = 8) and expert urologists (n = 5). All candidates performed a procedure on the GreenLight Simulator within a simulated setting using a standard vital signs monitor and then the Google GLASS. The time taken to respond to abnormal vital signs during both sessions was recorded...
December 2016: International Journal of Surgery
https://www.readbyqxmd.com/read/27828253/design-fabrication-and-characterization-of-transparent-retro-reflective-screen
#14
Shoaib R Soomro, Hakan Urey
A transparent retro-reflective screen, which can be used as head-up-display (HUD) or a see-through screen for head mounted projection displays (HMPD) is proposed. The high optical gain of screen enables the use of low power projectors to produce very bright content. The screen assembly is based on retro-reflective microspheres, patterned on an optically clear substrate using steel stencil as a shadow mask. The incident light is retro-reflected as a narrow angular cone to create an eyebox for the viewer. The optical gain and transparency of screen is varied by changing the fill factor of the mask...
October 17, 2016: Optics Express
https://www.readbyqxmd.com/read/27810828/use-of-virtual-reality-feedback-for-patients-with-chronic-neck-pain-and-kinesiophobia
#15
Karen B Chen, Mary E Sesto, Kevin Ponto, James Leonard, Andrea Mason, Gregg Vanderheiden, Justin Williams, Robert G Radwin
This study examined how individuals with and without neck pain performed exercises under the influence of altered visual feedback in virtual reality. Chronic neck pain (n=9) and asymptomatic (n=10) individuals were recruited for this cross-sectional study. Participants performed head rotations while receiving programmatically manipulated visual feedback from a head-mounted virtual reality display. The main outcome measure was the control-display gain (ratio between actual head rotation angle and visual rotation angle displayed) recorded at the just-noticeable difference...
October 26, 2016: IEEE Transactions on Neural Systems and Rehabilitation Engineering
https://www.readbyqxmd.com/read/27747138/immersive-molecular-visualization-with-omnidirectional-stereoscopic-ray-tracing-and-remote-rendering
#16
John E Stone, William R Sherman, Klaus Schulten
Immersive molecular visualization provides the viewer with intuitive perception of complex structures and spatial relationships that are of critical interest to structural biologists. The recent availability of commodity head mounted displays (HMDs) provides a compelling opportunity for widespread adoption of immersive visualization by molecular scientists, but HMDs pose additional challenges due to the need for low-latency, high-frame-rate rendering. State-of-the-art molecular dynamics simulations produce terabytes of data that can be impractical to transfer from remote supercomputers, necessitating routine use of remote visualization...
May 2016: IEEE International Symposium on Parallel & Distributed Processing, Workshops and Phd Forum: [proceedings]
https://www.readbyqxmd.com/read/27730391/an-html-tool-for-production-of-interactive-stereoscopic-compositions
#17
Alexey Chistyakov, Maria Teresa Soto, Enric Martí, Jordi Carrabina
The benefits of stereoscopic vision in medical applications were appreciated and have been thoroughly studied for more than a century. The usage of the stereoscopic displays has a proven positive impact on performance in various medical tasks. At the same time the market of 3D-enabled technologies is blooming. New high resolution stereo cameras, TVs, projectors, monitors, and head mounted displays become available. This equipment, completed with a corresponding application program interface (API), could be relatively easy implemented in a system...
December 2016: Journal of Medical Systems
https://www.readbyqxmd.com/read/27729595/a-review-of-wearable-technology-in-medicine
#18
Mohammed H Iqbal, Abdullatif Aydin, Oliver Brunckhorst, Prokar Dasgupta, Kamran Ahmed
With rapid advances in technology, wearable devices have evolved and been adopted for various uses, ranging from simple devices used in aiding fitness to more complex devices used in assisting surgery. Wearable technology is broadly divided into head-mounted displays and body sensors. A broad search of the current literature revealed a total of 13 different body sensors and 11 head-mounted display devices. The latter have been reported for use in surgery (n = 7), imaging (n = 3), simulation and education (n = 2) and as navigation tools (n = 1)...
October 2016: Journal of the Royal Society of Medicine
https://www.readbyqxmd.com/read/27694975/projection-type-see-through-holographic-three-dimensional-display
#19
Koki Wakunami, Po-Yuan Hsieh, Ryutaro Oi, Takanori Senoh, Hisayuki Sasaki, Yasuyuki Ichihashi, Makoto Okui, Yi-Pai Huang, Kenji Yamamoto
Owing to the limited spatio-temporal resolution of display devices, dynamic holographic three-dimensional displays suffer from a critical trade-off between the display size and the visual angle. Here we show a projection-type holographic three-dimensional display, in which a digitally designed holographic optical element and a digital holographic projection technique are combined to increase both factors at the same time. In the experiment, the enlarged holographic image, which is twice as large as the original display device, projected on the screen of the digitally designed holographic optical element was concentrated at the target observation area so as to increase the visual angle, which is six times as large as that for a general holographic display...
October 3, 2016: Nature Communications
https://www.readbyqxmd.com/read/27634561/effects-of-visual-display-on-joint-excursions-used-to-play-virtual-dodgeball
#20
James S Thomas, Christopher R France, Megan E Applegate, Samuel T Leitkam, Peter E Pidcoe, Stevan Walkowski
BACKGROUND: Virtual reality (VR) interventions hold great potential for rehabilitation as commercial systems are becoming more affordable and can be easily applied to both clinical and home settings. OBJECTIVE: In this study, we sought to determine how differences in the VR display type can influence motor behavior, cognitive load, and participant engagement. METHODS: Movement patterns of 17 healthy young adults (8 female, 9 male) were examined during games of Virtual Dodgeball presented on a three-dimensional television (3DTV) and a head-mounted display (HMD)...
September 15, 2016: JMIR Serious Games
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