scholarly journals System for 3D Visualization of Flaws for Eddy Current Inspection

10.14311/818 ◽  
2006 ◽  
Vol 46 (2) ◽  
Author(s):  
A. Dočekal ◽  
M. Kreidl ◽  
R. Šmíd
Keyword(s):  
Eddy Current ◽  
3D Visualization ◽  
Three Dimensional ◽  
Single Frequency ◽  
Scanning System ◽  
Data Processing Method ◽  
Eddy Current Inspection ◽  
Novel Method ◽  
The Fourier Transform ◽  
Automated Scanning

This paper presents a novel method for 3D visualization of flaws detected during Eddy Current (EC) inspection. The EC data was acquired using an automated scanning system equipped with precise eddy current probe positioning. The method was tested on a single frequency instrument with an absolute probe. The EC inspection procedure is implemented statically by registering the operating point of the instrument at each equidistant point on a tested object.The paper describes a data processing method based on the Fourier transform enabling 3D visualization of flaws. This three-dimensional image of the result of a scan enables the position of flaws to be determined, and the size and bevel (angle to the surface) of each detected flaw to be estimated. This research investigated flaws rising from the surface of the tested object, and flaw depth was not evaluated in this work. This method of visualization is simple to implement and is currently targeted for application in EC scanning devices. 

scholarly journals POSSIBILITIES OF THE APPLICATION OF THREE-DIMENSIONAL TECHNOLOGIES AND MODERN TECHNOLOGICAL MEANS IN THE CRIME INVESTIGATION ACTIVITY

2018 ◽  
Vol 18 ◽  
pp. 98-105
Author(s):  
N. V. Pavliuk
Keyword(s):  
Digital Media ◽  
Technology Use ◽  
Laser Scanning ◽  
3D Model ◽  
Imaging System ◽  
3D Visualization ◽  
Three Dimensional ◽  
Scanning System ◽  
Crime Reconstruction ◽  
Technological Means

The issues related to the introduction of innovative methods, technologies and technological means in the investigation of crimes are considered. It is noted that one of the main directions of the development of Criminalistics is the assimilation of the virtual reality associated with computerization of spheres of life, implementation of modern technologies and their use in law enforcement. Technology use of laser scanning of terrain and objects resulting in 3D model is produced allows several times to increase informative value of data collected at the incident scene, provides a visual and convenient visualization in three-dimensional form. As against photo and video images, 3D model has a stereoscopic image and the ability to freely change the angle while viewing. Besides to scanning results can be stored on any digital media without the possibility of changes or adjustments. Attention is focused on the technological capabilities of 3D-visualization systems on examples of their use in foreign countries as technological means of capturing the situation of the scene and the subsequent of a crime reconstruction. Thus, using a portable three-dimensional imaging system for working with volumetric traces at a crime scene, it is possible to obtain accurate three-dimensional images of traces of protectors or footprints (shoes) on soil and snow. This system is an alternative to traditional methods of fixing evidence: photofixing and making plaster casts. Unlike other systems, new approach does not require the use of lasers. The expediency of expanding the range of 3D laser scanning system use in modern investigative and judicial practice of our state with the aim of increasing the level of provision of pre-trial investigation authorities with technological means and bringing it closer to European standards is argued.

scholarly journals Digital Three-Dimensional Visualization of Intrabony Periodontal Defects for Surgical Planning (Pilot Case Study)

2020 ◽  
Author(s):  
Daniel Palkovics ◽  
Francesco Guido Mangano ◽  
Katalin Nagy ◽  
Peter Windisch
Keyword(s):  
Treatment Planning ◽  
Surgical Planning ◽  
3D Visualization ◽  
Three Dimensional ◽  
Digital Models ◽  
Direct Measurements ◽  
Novel Method ◽  
Digital Measurements ◽  
Periodontal Diagnostics

Abstract Background: In the regenerative treatment of intrabony periodontal defects, surgical strategies are determined by defect morphologies. Clinical direct measurements and intraoral radiographs are the main tools in periodontal diagnostics and surgical planning, however in certain cases they don’t provide sufficient amount of information. Therefore, the application of cone-beam computed tomography (CBCT) in diagnosis and treatment planning of periodontally involved patients has been proposed. The aim of this study is to present a novel method for 3D visualization of intrabony periodontal defects on digital models reconstructed from CBCT datasets for diagnostics and treatment planning.Methods: 4 patients with a total of 6 intrabony periodontal defects were enrolled in the present study. 2 months following initial periodontal treatment CBCT scan is taken. Radiographic image processing (segmentation) of CBCT datasets were performed in a radiographic imaging software to acquire anatomically accurate, virtual three-dimensional polygon models of surgical areas. Intrasurgical and digital measurements were taken, and results were compared, to validate the accuracy of digital models.Results: Difference between intrasurgical- and digital measurements in depth and width of intrabony components of periodontal defects were 0,31±0,21 mm and 0,41±0,44 mm respectively.Conclusion: It can be concluded that, the described digital workflow is useful in the treatment of certain periodontal intrabony defect morphologies. However, to determine the exact use cases of such technology further studies and examination is necessary.Trial Registration: Retrospective Ethics Approval

scholarly journals Three-Dimensional Visualization of Myocardial Ischemia Based on the Standard Twelve-Lead Electrocardiogram

2016 ◽  
Vol 2016 ◽  
pp. 1-8
Author(s):  
Ying Ma ◽  
Yang Sheng ◽  
Tian Ruixia ◽  
Chen Xun
Keyword(s):  
Myocardial Ischemia ◽  
3D Visualization ◽  
Detection Threshold ◽  
Three Dimensional ◽  
Medical Knowledge ◽  
Color Pattern ◽  
Novel Method ◽  
The Difference ◽  
Pseudo Color ◽  
Electrocardiogram Ecg

A novel method was proposed for transforming the ischemic information in the 12-lead electrocardiogram (ECG) into the pseudo-color pattern displayed on a 3D heart model based on the projection of a ST injury vector in this study. The projection of the ST injury vector at a point on the heart surface was used for identifying the presence of myocardial ischemia by the difference between the projection value and the detection threshold. Supposing that myocardial ischemia was uniform and continuous, the location and range of myocardial ischemia could be accurately calculated and visually displayed in a color-encoding way. The diagnoses of the same patient were highly consistent (kappa coefficientk=0.9030) between the proposed method used by ordinary people lacking medical knowledge and the standard 12-lead ECG used by experienced cardiologists. In addition, the diagnostic accuracy of the proposed method was further confirmed by the coronary angiography. The results of this study provide a new way to promote the development of the 3D visualization of the standard 12-lead ECG, which has a great help for inexperienced doctors or ordinary family members in their diagnosis of patients with myocardial ischemia.

A novel data processing method for sectional rail measurements to detect track irregularities in high-speed railways

2016 ◽  
Vol 232 (2) ◽  
pp. 435-444 ◽  
Author(s):  
Yangtenglong Li ◽  
Minyi Cen ◽  
Tonggang Zhang
Keyword(s):  
Measurement Errors ◽  
High Speed ◽  
Three Dimensional ◽  
Measurement Data ◽  
Data Processing Method ◽  
Novel Method ◽  
The Difference ◽  
Point Data ◽  
Sectional Measurement ◽  
Adjustment Equation

Static track inspection methods record the position and direction data through track surveys completed by trolleys that survey a track based on a track control network. The track inspection points must be measured in sections to decrease the likelihood of measurement errors. Certain track inspection points will be measured twice by adjacent stations, and different results will be obtained because of the measurement errors. To improve the regularity of the track, inspection point data from the sectional measurements must be processed, and differences in the results for the same inspection points must be eliminated. Therefore, this paper proposes a novel method referred to as the regularity for processing sectional measurement data (RPSMD) method, which overcomes the disadvantages of the currently available methods of processing inspection points via track-surveying trolleys and also improves the processing of nonoverlapping and overlapping inspection points. The adjustment criterion states that the difference value for the same adjusted overlapping points should be zero, and this criterion can be used to obtain the adjustment equation for each station. Using the adjustment equation, all station points can be corrected and the total regularity of the track points can be guaranteed. According to precisely measured ballastless tracks and their calculated three-dimensional coordinates, the RPSMD method and other available methods are verified by an experimentally designed precise mechanical device. The experimental results show that the accuracy of the nonoverlapping points adjusted by the RPSMD method is improved, and the accuracy is obviously higher than that obtained by the other available methods. Also, the accuracy of the RPSMD-adjusted overlapping points is much higher than that of the nonadjusted points.

scholarly journals 3D visualization and volume based quantification of rice chalkiness in vivo by using high resolution micro-CT

2020 ◽  
Author(s):  
Yi Su ◽  
Langtao Xiao
Keyword(s):  
High Throughput ◽  
High Throughput Screening ◽  
3D Visualization ◽  
Three Dimensional ◽  
Micro Ct ◽  
Kernel Quality ◽  
Production Practice ◽  
Phenotype Analysis ◽  
Novel Method

Abstract Background: Rice quality research attracts attention worldwide. Rice chalkiness is one of the key indexes determining rice kernel quality. The traditional rice chalkiness measurement methods are mainly based on naked-eye observation or two-dimensional (2D) image analysis and the results could not represent the three-dimensional (3D) characteristics of chalkiness in the rice kernel. These methods are neither in vivo thus are unable to provide technical support for high throughput screening of rice chalkiness phenotype. Results: Here, we introduced a novel method for 3D visualization and accurate volume-based quantification of rice chalkiness in vivo by using X-ray microcomputed tomography (micro-CT). This approach not only develops a novel method to measure the rice chalkiness index, but also provides a high throughput solution for rice chalkiness phenotype analysis. Conclusions: Our method could be a new powerful tool for rice chalkiness measurement, which would greatly help the research of rice chalkiness traits as well as the quality evaluation in rice production practice.

scholarly journals 0689 Use Of An Automated Scanning System To Select A Patient Interface

SLEEP ◽  
2020 ◽  
Vol 43 (Supplement_1) ◽  
pp. A263-A263
Author(s):  
W Hardy ◽  
J Jasko ◽  
R Bogan
Keyword(s):  
Selection Process ◽  
Three Dimensional ◽  
Controlled Study ◽  
Adherence Rate ◽  
Scanning System ◽  
3D Scanner ◽  
Open Label ◽  
Sleep Centers ◽  
Automated Scanning ◽  
The Impact

Abstract Introduction There is no universal process for selecting mask style, size, and fit, and there is considerable variance in clinician and patient mask preference and patient anatomy. Poor mask fit may negatively affect adherence. A three-dimensional (3D) facial scanner and proprietary analytical software were developed to bring efficiencies to mask selection. This study explored the impact of that system on initial mask success compared to standard practice. Methods This was an open-label, randomized-controlled study. Participants provided written informed consent. 3D Scanner Arm (3DA): Participants answered questions about sleeping habits then had 3D facial images taken. Proprietary software recommended a hierarchy of up to four Philips Respironics masks and sizes. Traditional Fitting Arm (TFA): A designated clinician selected and fit masks using their standard methods. Mask selection was assessed by applying therapy and soliciting patient and clinician feedback. Mask refits and adherence were tracked through 90 days. Five sleep centers recruited 115 participants into the 3DA (61 males, 51.1±13.4 years, BMI 35.2±7.0, diagnostic AHI 26.2±21.9) and 123 into the TFA (79 males, 51.1±11.9 years, BMI 35±7.9, diagnostic AHI 26.9±22.6). Results A significantly higher percentage of 3DA patients required only one mask fitting (with no refits) compared to TFA during the initial setup (89.6% vs. 54.5%, p<0.001) and through 90 days (62.6% vs 37.4%, p<0.001). 3DA subjectively rated confidence in and satisfaction with the scanner-selected mask significantly higher than TFA. Mask leak was lower in the 3DA compared to TFA (29.4±10.6 vs 32.3±11.4 L/M, p= 0.043). The CMS adherence rate tended to favor 3DA vs. TFA (66.7% vs. 55.3, p=0.083). There were no significant differences in AHI or other adherence metrics. Conclusion The 3D scanner system was successful in mask selection with lower mask leak and greater patient satisfaction and confidence. This tool may bring about operational efficiencies to the mask selection process. Support This study was sponsored by Philips Respironics

scholarly journals A Novel Planar Differential Koch Fractal Eddy Current Probe with Parallel Wound Topological Structure

2021 ◽  
Vol 2021 ◽  
pp. 1-13
Author(s):  
Guolong Chen ◽  
Zheng Cao ◽  
Weimin Zhang
Keyword(s):  
Eddy Current ◽  
Model Simulation ◽  
Three Dimensional ◽  
Complex Surface ◽  
Detailed Comparison ◽  
Element Model ◽  
Structure Design ◽  
Topological Transformation ◽  
Coil Structure ◽  
Novel Method

Flexible planar eddy current probes are widely used to detect conductive components with complex surface. In this study, topological transformation is applied to design a differential Koch coil exciting eddy current probe. Two kinds of Koch exciting coils, Koch A and Koch B , were obtained by topological transformation from a three-dimensional differential exciting eddy current probe. Finite element model simulation is conducted to visualize the differences of eddy current distributions induced by the probes and get the defect signal. A detailed comparison is made among the two kinds of Koch eddy current probes and a circular eddy current probe by experiments. The experiments demonstrate that the sensitivity of the Koch A eddy current probe is higher than that of another two probes for detecting the defect which is shorter than the size of the probe. This work provides a novel method for improving the performance of eddy current probes in the coil structure design.

Bi-eddy current sensor based automated scanning system for thickness measurement of thick metallic plates

2018 ◽  
Vol 96 (5-8) ◽  
pp. 2867-2873 ◽  
Author(s):  
Hocine Nebair ◽  
Ahmed Cheriet ◽  
Islam N. El Ghoul ◽  
Bachir Helifa ◽  
Samir Bensaid ◽  
...  
Keyword(s):  
Eddy Current ◽  
Thickness Measurement ◽  
Current Sensor ◽  
Scanning System ◽  
Eddy Current Sensor ◽  
Automated Scanning ◽  
Metallic Plates
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