scholarly journals A Simulator-based Comparison of a Novel 3D and a Conventional 3D Vision System-surgical Performance and Subjective Ratings

Inventions ◽  
2019 ◽  
Vol 4 (4) ◽  
pp. 58
Author(s):  
Svenner ◽  
Fan ◽  
Forsman ◽  
Shabo ◽  
Hallbeck ◽  
...  
Keyword(s):  
Vision System ◽  
Three Dimensional ◽  
Surgical Instruments ◽  
The Novel ◽  
Two Dimensional ◽  
Subjective Ratings ◽  
Surgical Performance ◽  
3D Vision ◽  
Eye Symptoms ◽  
Laparoscopic Vision

In laparoscopy, novel three-dimensional laparoscopic vision systems (3D LVS) without glasses (3D−) have been invented. While standard 3D LVS with glasses (3D+) have shown advantages over original two-dimensional systems, quantitative comparisons of surgical performance between 3D− and 3D+ systems are still lacking. The aim is to compare the systems in simulated robotic surgery tasks. In a crossover study, 18 medical students performed four basic laparoscopic tasks in the validated Simball Box simulator with authentic surgical instruments by using the 3D+ and 3D− systems. Performance was measured by the number of errors and the task’s duration. Subjective ratings of perceptions and preference were assessed after each test. There were significant, but still minor, advantages for the conventional 3D+ system regarding spatial orientation and sense of depth. Overall, ten and eight subjects preferred 3D+ and 3D− systems, respectively. No significant differences were found in performance, post-operative physicals or eye symptoms. The novel 3D− system was similar to the conventional 3D+ system regarding performance and overall preference, while there were minor advantages for the 3D+ system in the subjective ratings. Since the 3D− system is a new invention, it should have a higher potential of usability improvements.

scholarly journals Can 3D Vision Improve Laparoscopic Performance in Box Simulation Training when Compared to Conventional 2D Vision?

Folia Medica ◽  
2019 ◽  
Vol 61 (4) ◽  
pp. 491-499
Author(s):  
Johanna Österberg ◽  
Arestis Sokratous ◽  
Konstantinos Georgiou ◽  
Lars Enochsson
Keyword(s):  
3D Imaging ◽  
Three Dimensional ◽  
Surgical Instruments ◽  
Surgical Performance ◽  
3D Vision ◽  
Linear Distance ◽  
Time Distance ◽  
Training Exercises ◽  
Time Linear ◽  
Laparoscopic Performance

Introduction: Three-dimensional (3D) imaging systems have been introduced in laparoscopic surgery to facilitate binocular vision and dexterity to improve surgical performance and safety. Several studies have shown the benefits of 3D imaging in laparoscopy, but until now only a few studies have assessed the outcome by using objective variables. Box trainers are affordable alternatives to virtual laparoscopic surgical training, and the possibility of using real surgical instruments makes them more realistic to use. However, the data and feedback by a virtual simulator have not, until now, been able to assess. Simball Box®, equipped with G-coder sensors®, registers the instrument movements during training and gives the same feedback like a virtual simulator.Aim: The aim of this study was to objectively evaluate the laparoscopic performance in 3D compared to conventional 2D vision by using a box simulation trainer.Materials and methods: Thirty surgeons, residents and consultants, participated in the study. Eighteen had no, or minimal, laparoscopic experience (novices) whereas 12 were experts. They all performed three standard box training exercises (rope race, precision cutting, and basic suturing) in Simball Box. The participants were randomized and started with either 3D HD or traditional 2D HD cameras. The exercises were instructed and supervised. All instrument movements were registered. Variations in time, linear distance, average speed, and motion smoothness were analyzed.Results: The parameters time, distance, speed, and motion smoothness were significantly better when the 3D camera was used.Conclusion: All individuals of both subgroups achieved significantly higher speed and better motion smoothness when using 3D.

Design and Implementation of a Stereoscopic Video Player for a Time-Division Display

2014 ◽  
Vol 577 ◽  
pp. 1008-1011
Author(s):  
Chao Hui Lü ◽  
Jia Ying Pan ◽  
Chen Zhang ◽  
Hui Ren
Keyword(s):  
Depth Perception ◽  
Vision System ◽  
Three Dimensional ◽  
Video Technology ◽  
Stereoscopic Video ◽  
3D Vision ◽  
Design And Implementation ◽  
Video Player ◽  
Time Division

Three-dimensional video technology is becoming more and more popular, because it can provide a better natural depth perception. In this paper, a stereoscopic video player for a time-division display is designed and implemented, and people can use 3D Shutter Glasses to watch stereoscopic video by the player. It mainly focuses on the process of designing a Direct3D application, and the special handling of NVIDIA 3D Vision system for stereoscopic video. Upon examination, the stereoscopic video player can provide stereoscopic perception and good immersive experience.

Application of a Visual Measurement Technique to the Assessment of Electrodynamic Stamping

2011 ◽  
Vol 177 ◽  
pp. 1-9 ◽  
Author(s):  
Józef Bednarczyk ◽  
Andrzej Sioma
Keyword(s):  
Vision System ◽  
Three Dimensional ◽  
Three Dimensional Model ◽  
3D Vision ◽  
Visual Measurement ◽  
Low Profile ◽  
Beam Analysis ◽  
Dimensional Parameters ◽  
Inspection Tasks ◽  
Unconventional Machining

This paper discusses a visual method of measuring the geometric parameters of elements produced by electrodynamic stamping. This paper presents also electrodynamic method which is an unconventional machining technology, which complements the capabilities of traditional technologies, in particular as regards the formation of metal elements with low-profile dies of complex shape. The article discusses issues related to resolution of the vision system, resolution of laser beam analysis, and resolution relating to the measurement of the height profile on the surface of the product. Based on the model constructed in such a way, measurements are presented in order to assess the dimensional parameters. Based on tests and analyses of the three-dimensional model, a range of inspection tasks using 3D vision systems is indicated.

scholarly journals Indoor Key Point Reconstruction Based on Laser Illumination and Omnidirectional Vision

2020 ◽  
Vol 24 (7) ◽  
pp. 864-871
Author(s):  
Yang Qi ◽  
◽  
Yuan Li
Keyword(s):  
Vision System ◽  
Structured Light ◽  
Three Dimensional ◽  
Mathematical Representation ◽  
Omnidirectional Vision ◽  
Wide Field ◽  
3D Vision ◽  
Imaging Model ◽  
Key Points ◽  
Indoor Scenes

Efficient and precise three-dimensional (3D) measurement is an important issue in the field of machine vision. In this paper, a measurement method for indoor key points is proposed with structured lights and omnidirectional vision system and the system can achieve the wide field of view and accurate results. In this paper, the process of obtaining indoor key points is as follows: Firstly, through the analysis of the system imaging model, an omnidirectional vision system based on structured light is constructed. Secondly, the full convolution neural network is used to estimate the scene for the dataset. Then, according to the geometric relationship between the scenery point and its reference point in structured light, for obtaining the 3D coordinates of the unstructured light point is presented. Finally, combining the full convolution network model and the structured light 3D vision model, the 3D mathematical representation of the key points of the indoor scene frame is completed. The experimental results proved that the proposed method can accurately reconstruct indoor scenes, and the measurement error is about 2%.

An assessment of the new generation three-dimensional high definition laparoscopic vision system on surgical skills: a randomized prospective study

2014 ◽  
Vol 29 (8) ◽  
pp. 2305-2313 ◽  
Author(s):  
Taner A. Usta ◽  
Aysel Ozkaynak ◽  
Ebru Kovalak ◽  
Erdinc Ergul ◽  
M. Murat Naki ◽  
...  
Keyword(s):  
Prospective Study ◽  
Vision System ◽  
Three Dimensional ◽  
Surgical Skills ◽  
High Definition ◽  
Laparoscopic Vision ◽  
New Generation

scholarly journals Three-Dimensional Face Reconstruction Using Multi-View-Based Bilinear Model

Sensors ◽  
2019 ◽  
Vol 19 (3) ◽  
pp. 459
Author(s):  
Liang Tian ◽  
Jing Liu ◽  
Wei Guo
Keyword(s):  
Vision System ◽  
Three Dimensional ◽  
Bilinear Model ◽  
Traditional Methods ◽  
3D Vision ◽  
Feature Extraction Method ◽  
Face Reconstruction ◽  
Uncalibrated Images ◽  
Prior Constraint ◽  
3D Information

Face reconstruction is a popular topic in 3D vision system. However, traditional methods often depend on monocular cues, which contain few feature pixels and only use their location information while ignoring a lot of textural information. Furthermore, they are affected by the accuracy of the feature extraction method and occlusion. Here, we propose a novel facial reconstruction framework that accurately extracts the 3D shapes and poses of faces from images captured at multi-views. It extends the traditional method using the monocular bilinear model to the multi-view-based bilinear model by incorporating the feature prior constraint and the texture constraint, which are learned from multi-view images. The feature prior constraint is used as a shape prior to allowing us to estimate accurate 3D facial contours. Furthermore, the texture constraint extracts a high-precision 3D facial shape where traditional methods fail because of their limited number of feature points or the mostly texture-less and texture-repetitive nature of the input images. Meanwhile, it fully explores the implied 3D information of the multi-view images, which also enhances the robustness of the results. Additionally, the proposed method uses only two or more uncalibrated images with an arbitrary baseline, estimating calibration and shape simultaneously. A comparison with the state-of-the-art monocular bilinear model-based method shows that the proposed method has a significantly higher level of accuracy.

scholarly journals Gender benefit in laparoscopic surgical performance using a 3D-display system: data from a randomized cross-over trial

2021 ◽  
Author(s):  
Jana Busshoff ◽  
Rabi R. Datta ◽  
Thomas Bruns ◽  
Robert Kleinert ◽  
Bernd Morgenstern ◽  
...  
Keyword(s):  
Medical Students ◽  
Vision System ◽  
Display System ◽  
3D Display ◽  
Surgical Performance ◽  
3D Vision ◽  
Significant Difference ◽  
System Data ◽  
The Difference ◽  
Display Technique

Abstract Background The use of 3D technique compared to high-resolution 2D-4K-display technique has been shown to optimize spatial orientation and surgical performance in laparoscopic surgery. Since women make up an increasing amount of medical students and surgeons, this study was designed to investigate whether one gender has a greater benefit from using a 3D compared to a 4K-display system. Methods In a randomized cross-over trial, the surgical performance of male and female medical students (MS), non-board certified surgeons (NBCS), and board certified surgeons (BCS) was compared using 3D- vs. 4K-display technique at a minimally invasive training parkour with multiple surgical tasks and repetitions. Results 128 participants (56 women, 72 men) were included. Overall parkour time in seconds was 3D vs. 4K for all women 770.7 ± 31.9 vs. 1068.1 ± 50.0 (p < 0.001) and all men 664.5 ± 19.9 vs. 889.7 ± 31.2 (p < 0.001). Regarding overall mistakes, participants tend to commit less mistakes while using the 3D-vision system, showing 10.2 ± 1.1 vs. 13.3 ± 1.3 (p = 0.005) for all women and 9.6 ± 0.7 vs. 12.2 ± 1.0 (p = 0.001) for all men. The benefit of using a 3D system, measured by the difference in seconds, was for women 297.3 ± 41.8 (27.84%) vs. 225.2 ± 23.3 (25.31%) for men (p = 0.005). This can be confirmed in the MS group with 327.6 ± 65.5 (35.82%) vs. 249.8 ± 33.7 (32.12%), p = 0.041 and in the NBCS group 359 ± 52.4 (28.25%) vs. 198.2 ± 54.2 (18.62%), p = 0.003. There was no significant difference in the BCS group. Conclusion 3D laparoscopic display technique optimizes surgical performance compared to the 2D-4K technique for both women and men. The greatest 3D benefit was found for women with less surgical experience. As a possible result of surgical education, this gender specific difference disappears with higher grade of experience. Using a 3D-vision system could facilitate surgical apprenticeship, especially for women.

Evaluation of the Operational Parameters of Ropes

2011 ◽  
Vol 177 ◽  
pp. 125-134 ◽  
Author(s):  
Andrzej Sioma ◽  
Andrzej Tytko
Keyword(s):  
3D Model ◽  
Surface Defects ◽  
Vision System ◽  
Three Dimensional ◽  
Operational Parameters ◽  
Three Dimensional Model ◽  
Height Profile ◽  
3D Vision ◽  
Inspection Tasks

This paper discusses a visual method of measuring the geometric parameters of ropes and evaluating their wear based on measurements of a three-dimensional rope model. The 3D model is created using the method of laser triangulation. Selection of appropriate geometry of camera and laser lighting arrangement allows collection of the height profile of the observed rope surface in the selected cross-section and, subsequently, building of a 3D model. The resulting model is a representation of the actual dimensions of the rope and allows determination of the parameters describing its basic geometric dimensions and condition of rope surface. Determination of those values and parameters allows estimation of the degree of rope wear. The article discusses issues related to resolution of the vision system, resolution of laser beam analysis, and resolution relating to the measurement of the height profile on the surface of the rope. Based on the model constructed in such a way, measurements are presented in order to assess the dimensional parameters and surface defects in sample rope structures. Based on tests and analyses of the three-dimensional model, a range of inspection tasks using 3D vision systems is indicated.

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