Real-Time 3D Visualization and Navigation Using Fiber-Based Endoscopic System for Arthroscopic Surgery

2016 ◽  
Vol 20 (5) ◽  
pp. 735-742 ◽  
Author(s):  
Zhongjie Long ◽  
◽  
Kouki Nagamune ◽  
Ryosuke Kuroda ◽  
Masahiro Kurosaka ◽  
...  
Keyword(s):  
Knee Joint ◽  
Real Time ◽  
3D Visualization ◽  
Arthroscopic Surgery ◽  
Three Dimensional ◽  
Joint Surface ◽  
Computer Assisted ◽  
Normal Vector ◽  
3D Navigation ◽  
Freehand Technique

Three-dimensional (3D) navigation using a computer-assisted technique is being increasingly performed in minimally invasive surgical procedures because it can provide stereoscopic information regarding the operating field to the surgeon. In this paper, the development of a real-time arthroscopic system utilizing an endoscopic camera and optical fiber to navigate a normal vector for a reconstructed knee joint surface is described. A specific navigation approach suitable for use in a rendered surface was presented in extenso. A small-sized endoscopic tube was utilized arthroscopically on a cadaveric knee joint to show the potential application of the developed system. Experimental results of underwater navigation on a synthetic knee joint showed that our system allows for a higher accuracy than a freehand technique. The mean angle of navigation for the proposed technique is 9.5circ (range, 5circ to 17circ; SD, 2.86circ) versus 14.8circ (range, 6circ to 26circ; SD, 7.53circ) and 12.6circ (range, 4circ to 17circ; SD, 3.98circ) for two sites using a freehand technique.

scholarly journals Bedside 3D Visualization of Lymphatic Vessels with a Handheld Multispectral Optoacoustic Tomography Device

2020 ◽  
Vol 9 (3) ◽  
pp. 815 ◽  
Author(s):  
Guido Giacalone ◽  
Takumi Yamamoto ◽  
Florence Belva ◽  
Akitatsu Hayashi
Keyword(s):  
Real Time ◽  
Near Infrared ◽  
3D Visualization ◽  
Imaging Modality ◽  
Three Dimensional ◽  
Lymphatic Vessels ◽  
Secondary Lymphedema ◽  
Optoacoustic Tomography ◽  
Small Vessels ◽  
Promising Tool

Identification of lymphatics by Indocyanine Green (ICG) lymphography in patients with severe lymphedema is limited due to the overlying dermal backflow. Nor can the method detect deep and/or small vessels. Multispectral optoacoustic tomography (MSOT), a real-time three- dimensional (3D) imaging modality which allows exact spatial identification of absorbers in tissue such as blood and injected dyes can overcome these hurdles. However, MSOT with a handheld probe has not been performed yet in lymphedema patients. We conducted a pilot study in 11 patients with primary and secondary lymphedema to test whether lymphatic vessels could be detected with a handheld MSOT device. In eight patients, we could not only identify lymphatics and veins but also visualize their position and contractility. Furthermore, deep lymphatic vessels not traceable by ICG lymphography and lymphatics covered by severe dermal backflow, could be clearly identified by MSOT. In three patients, two of which had advanced stage lymphedema, only veins but no lymphatic vessels could be identified. We found that MSOT can identify and image lymphatics and veins in real-time and beyond the limits of near-infrared technology during a single bedside examination. Given its easy use and high accuracy, the handheld MSOT device is a promising tool in lymphatic surgery.

A new computer assisted real time 3D navigation system for interstitial brachytherapy

2001 ◽  
Vol 51 (3) ◽  
pp. 197 ◽  
Author(s):  
R.C. Krempien ◽  
S. Hassfeld ◽  
W. Harms ◽  
T. Redlich ◽  
C. Hoffele ◽  
...  
Keyword(s):  
Real Time ◽  
Navigation System ◽  
Interstitial Brachytherapy ◽  
Computer Assisted ◽  
3D Navigation

Research on Real-Time 3D Visualization of Dam Transport on Network Environment

2012 ◽  
Vol 256-259 ◽  
pp. 2431-2434
Author(s):  
Xu Liu ◽  
Bo Cui ◽  
Da Wei Tong
Keyword(s):  
Real Time ◽  
Visual Information ◽  
3D Visualization ◽  
Three Dimensional ◽  
Earth Dam ◽  
Practical Significance ◽  
Dump Truck ◽  
Network Environment ◽  
Complex Technology ◽  
Construction Organization

According to the high earth dam with a large volume, high construction intensity, tense schedule, numerous construction machines, complex technology, and a lot of unexpected risk factors, the construction transportation becomes poor if the arrangement for transportation to the dam is unreasonable, which may result in schedule delays. This paper discusses the system of the real-time 3D visualization on network environment which is based on Unity3D engine, and the query of real-time three-dimensional visual information for transportation to the dam on the network environment is achieved. Users can have a real-time view of the dump truck during transportation and optimize the arrangements of construction organization. The results of research have great practical significance.

scholarly journals Methodology for Addressing Infectious Aerosol Persistence in Real-Time Using Sensor Network

Sensors ◽  
2021 ◽  
Vol 21 (11) ◽  
pp. 3928
Author(s):  
Sepehr Makhsous ◽  
Joelle M. Segovia ◽  
Jiayang He ◽  
Daniel Chan ◽  
Larry Lee ◽  
...  
Keyword(s):  
Real Time ◽  
Sensor Network ◽  
High Efficiency ◽  
3D Visualization ◽  
Three Dimensional ◽  
Local Area ◽  
Intervention Strategies ◽  
Dental Restoration ◽  
Transmission Risk ◽  
School Of Dentistry

Human exposure to infectious aerosols results in the transmission of diseases such as influenza, tuberculosis, and COVID-19. Most dental procedures generate a significant number of aerosolized particles, increasing transmission risk in dental settings. Since the generation of aerosols in dentistry is unavoidable, many clinics have started using intervention strategies such as area-filtration units and extraoral evacuation equipment, especially under the relatively recent constraints of the pandemic. However, the effectiveness of these devices in dental operatories has not been studied. Therefore, the ability of dental personnel to efficiently position and operate such instruments is also limited. To address these challenges, we utilized a real-time sensor network for assessment of aerosol dynamics during dental restoration and cleaning producers with and without intervention. The strategies tested during the procedures were (i) local area High-Efficiency Particle Air (HEPA) filters and (ii) Extra-Oral Suction Device (EOSD). The study was conducted at the University of Washington School of Dentistry using a network of 13 fixed sensors positioned within the operatory and one wearable sensor worn by the dental operator. The sensor network provides time and space-resolved particulate matter (PM) data. Three-dimensional (3D) visualization informed aerosol persistence in the operatory. It was found that area filters did not improve the overall aerosol concentration in dental offices in a significant way. A decrease in PM concentration by an average of 16% was observed when EOSD equipment was used during the procedures. The combination of real-time sensors and 3D visualization can provide dental personnel and facility managers with actionable feedback to effectively assess aerosol transmission in medical settings and develop evidence-based intervention strategies.

scholarly journals BIFNOM: Binary-Coded Features on Normal Maps

Sensors ◽  
2021 ◽  
Vol 21 (10) ◽  
pp. 3469
Author(s):  
Leo Miyashita ◽  
Akihiro Nakamura ◽  
Takuto Odagawa ◽  
Masatoshi Ishikawa
Keyword(s):  
Real Time ◽  
High Speed ◽  
Feature Detection ◽  
Local Coordinate System ◽  
Three Dimensional ◽  
Normal Vector ◽  
Interest Points ◽  
Actual System ◽  
Definition Of ◽  
Normal Maps

We propose a novel method for detecting features on normal maps and describing binary features, called BIFNOM, which is three-dimensionally rotation invariant and detects and matches interest points at high speed regardless of whether a target is textured or textureless and rigid or non-rigid. Conventional methods of detecting features on normal maps can also be applied to textureless targets, in contrast with features on luminance images; however, they cannot deal with three-dimensional rotation between each pair of corresponding interest points due to the definition of orientation, or they have difficulty achieving fast detection and matching due to a heavy-weight descriptor. We addressed these issues by introducing a three dimensional local coordinate system and converting a normal vector to a binary code, and achieved more than 750fps real-time feature detection and matching. Furthermore, we present an extended descriptor and criteria for real-time tracking, and evaluate the performance with both simulation and actual system.

Real-time three-dimensional (3D) visualization of fusion image for accurate subdural electrodes placement of epilepsy surgery

2017 ◽  
Vol 44 ◽  
pp. 330-334 ◽  
Author(s):  
Ayataka Fujimoto ◽  
Tohru Okanishi ◽  
Sotaro Kanai ◽  
Keishiro Sato ◽  
Mitsuyo Nishimura ◽  
...  
Keyword(s):  
Real Time ◽  
Epilepsy Surgery ◽  
3D Visualization ◽  
Three Dimensional ◽  
Fusion Image ◽  
Subdural Electrodes

Simulating ship and buoy motions arising from ocean waves in a ship handling simulator

SIMULATION ◽  
2012 ◽  
Vol 88 (12) ◽  
pp. 1407-1418 ◽  
Author(s):  
Dong Jin Yeo ◽  
Moohyun Cha ◽  
Duhwan Mun
Keyword(s):  
Real Time ◽  
3D Visualization ◽  
Three Dimensional ◽  
Ocean Waves ◽  
Ship Motions ◽  
Dynamics Model ◽  
Visualization System ◽  
System A ◽  
Calculation Module ◽  
Ship Handling

A ship’s real-time three-dimensional (3D) visualization system, a component of a handling simulator, is one of its most important components, since realistic and intuitive image generation play an essential role in improving the effects of education using ship navigation simulators. Ship handling simulators should have capabilities of calculating ship motions (heave, pitch, and roll) at any given sea state and display the calculated motions through a real-time 3D visualization system. The motion solver of a ship handling simulator calculates those motions in addition to maneuverings for an own ship, the main simulation target, but only provides maneuvering information about traffic ships. Therefore, it is required to simulate traffic ship and buoy motions arising from ocean waves in a ship handling simulator for realistic visualization. In this paper, the authors propose a simple dynamics model by which ship and buoy motions are calculated with the input data of wave height and discuss a method for the implementation of a ship and buoy motion calculation module. The feasibility of the proposed dynamics model and the motion calculation module has been demonstrated through the development of a prototype real-time 3D visualization system based on an open-source 3D graphics engine.

scholarly journals Application of a new percutaneous multi-function pedicle locator in minimally invasive spine surgery

2021 ◽  
Author(s):  
Xiaojian Liu ◽  
Hairun Liu ◽  
Yushan Wang
Keyword(s):  
Minimally Invasive ◽  
Spine Surgery ◽  
Three Dimensional ◽  
Operation Time ◽  
Minimally Invasive Spine Surgery ◽  
Computer Assisted ◽  
Assisted Navigation ◽  
Freehand Technique ◽  
Potential Benefits ◽  
Minimally Invasive Spine

Abstract A new percutaneous multi-function pedicle locator was designed to be used for personalized three-dimensional positioning of a pedicle in minimally invasive spine surgery without computer-assisted navigation technology. This article instructed the method and advantages of using a new percutaneous multi-function pedicle locator in minimally invasive surgery of the spine. Based on the position of a pedicles suggested by CT and X-ray images of a patient, 6 lines and 2 distances were used to determine the puncture point of a pedicle screw, while 2 angles were used to determine the inserting direction of a pedicle guide needle from the patient's body surface. The result of application of the locator was roughly compared with that of the conventional freehand technique. The potential benefits of using the locator included enhancing surgical accuracy, reducing the operation time, mitigating the harmful intra-operative radiation exposure, saving the costs and shortening the learning curve of young orthopedists. It was hoped that more doctors and patients will benefit from it.

Real-Time 3D Space Coordinate Acquisition of Medical Visualization Data

2010 ◽  
Vol 44-47 ◽  
pp. 3534-3537
Author(s):  
Zhan Li Hu ◽  
Jian Bao Gui ◽  
Jing Zou ◽  
Jun Yan Rong ◽  
Qi Yang Zhang ◽  
...  
Keyword(s):  
Real Time ◽  
Medical Images ◽  
3D Visualization ◽  
Medical Science ◽  
Three Dimensional ◽  
Medical Visualization ◽  
3D Images ◽  
Anatomy And Physiology ◽  
Time Interaction ◽  
3D Space

Medical visualization refers to the techniques and processes used to create images of the human body for clinical purposes or medical science including the study of normal anatomy and physiology. The visualization of medical images data sets is to reconstruct 3D images with the 2D slice images so as to reveal the 3D configuration of organs through human visual system. Visual C++ are used to reconstruct 3D images using the CT slice sequence. The key algorithms and human CT 3D visualization results are given in this paper. The coordinates can be acquired by the mouse clicking in the 3D space, by which to realize the point coordinate acquisition of the 3D medicine images. The visualization of medical images can provide us with more information and means of visual interactive for simulated operations and assistant diagnosis. The technique can realize the real time interaction quantitative measurement of three-dimensional CT image.

scholarly journals Methodology for Addressing Infectious Aerosol Persistence in Real-Time Using Sensor Network

2021 ◽  
Author(s):  
Sepehr Makhsous ◽  
Joelle M. Segovia ◽  
Jiayang He ◽  
Daniel Chan ◽  
Larry Lee ◽  
...  
Keyword(s):  
Real Time ◽  
Sensor Network ◽  
High Efficiency ◽  
3D Visualization ◽  
Three Dimensional ◽  
Local Area ◽  
Intervention Strategies ◽  
Dental Restoration ◽  
Transmission Risk ◽  
School Of Dentistry

Human exposure to infectious aerosols results a transmission of diseases, such as influenza, tuberculosis, and COVID-19. Most dental procedures generate a significant number of aerosolized particles, increasing transmission risk in dental settings. Since the generation of aerosols in dentistry is unavoidable, many clinics started using intervention strategies such as area-filtration units and extraoral evacuation equipment, especially under the relatively recent constraints of the pandemics. However, the effectiveness of these devices in dental operatories has not been studied. Therefore, the dental personnel's ability to position and operate such instruments efficiently is also limited. To address these challenges, we utilized a real-time sensor network for assessment of aerosol dynamics during dental restoration and cleaning producers with and without intervention. The strategies tested during the procedures were (i) local area high-efficiency particle air (HEPA) filters and (ii) extra-oral suction device (EOSD). The study was conducted at the University of Washington School of Dentistry using a network of thirteen fixed sensors positioned within the operatory and one wearable sensor worn by the dental operator. The sensor network provides time and space-resolved particulate matter (PM) data. Three-dimensional (3D) visualization informs aerosol persistence in the operatory. It was found that area filters did not improve the overall aerosol concentration in dental offices significantly. An average of 16% decrease in PM concentration was observed when EOSD equipment was used during the procedures. The combination of real-time sensors and 3D visualization can provide dental personnel and facility mangers with actionable feedback to effectively assess aerosol transmission in medical settings and develop evidence-based intervention strategies.

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