Data assimilation of structural deformation using finite element simulations and single-perspective projection data based on the example of X-ray imaging

Butz, Ines; Moser, Stefan M.; Nau, Siegfried; Hiermaier, Stefan

doi:10.1007/s42452-021-04522-7

Cited by 4 publications

(2 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Second, the different ways of projection were another limitation. Projections include perspective and orthographic projections [ 18 , 19 ]. Perspective projection is a linear projection where three-dimensional objects are projected on a picture plane [ 20 ].…”

Section: Discussionmentioning

confidence: 99%

Degree of Pelvic Rotation in the Coronal Plane on Postoperative Radiographs Obtained after Total Hip Arthroplasty

Yeh

Fuh

et al. 2022

JCM

View full text Add to dashboard Cite

There are many published cup anteversion measurements for postoperative total hip arthroplasty (THA), including Liaw’s, Lewinnek’s, and Murray’s methods. However, most measurements ignore the potential pelvic rotation on radiographs except in Liaw’s method. Without considering pelvic rotation, clinicians can miscalculate cup anteversion. Therefore, we aimed to quantify the mean degree of pelvic rotation. Herein, we collected 388 radiographs of 98 postoperative THA hips of 77 patients and measured pelvic rotation by measuring h, the horizontal displacement of the sacrococcygeal junction associated with the upper pole of the symphysis pubis, and ssd, the distance between the sacrococcygeal junction and pubic symphysis. The angle θ of pelvic rotation was defined as θ = arc sin (h/ssd) × (180°/π). The mean degree of pelvic rotation was then calculated. The standard deviation of h was 7.84 mm, and the mean ssd was 158 mm. The potential pelvic rotation was 2.50°. The p-values from the paired t-test were all >0.05 when interobserver and intraobserver errors were assessed. This is the first study to quantify the potential pelvic rotation in the coronal plane on postoperative plain radiographs. The potential pelvic rotation was too large to be neglected during the measurement of cup anteversion.

show abstract

Section: Discussionmentioning

confidence: 99%

Degree of Pelvic Rotation in the Coronal Plane on Postoperative Radiographs Obtained after Total Hip Arthroplasty

Yeh

Fuh

et al. 2022

JCM

View full text Add to dashboard Cite

show abstract

“…The observation and analysis of highly dynamic processes are of interest in a broad range of research fields, ranging from car-crash investigations (e.g., References [1,2]) and ballistics processes (e.g., References [3,4]) to geological impact (e.g., Reference [5]) and impacts of space debris on satellites (e.g., Reference [6]). As these processes happen on a timescale of milliseconds down to microseconds [7], both experimental observation and analysis are challenging.…”

Section: Introductionmentioning

confidence: 99%

A Priori Information Based Time-Resolved 3D Analysis of the Trajectory and Spatial Orientation of Fast-Moving Objects Using High-Speed Flash X-ray Imaging

Langkemper¹,

Moser²,

Büttner³

et al. 2022

J. Imaging

Self Cite

View full text Add to dashboard Cite

This paper shows that the X-ray analysis method known from the medical field, using a priori information, can provide a lot more information than the common analysis for high-speed experiments. Via spatial registration of known 3D shapes with the help of 2D X-ray images, it is possible to derive the spatial position and orientation of the examined parts. The method was demonstrated on the example of the sabot discard of a subcaliber projectile. The velocity of the examined object amounts up to 1600 m/s. As a priori information, the geometry of the experimental setup and the shape of the projectile and sabot parts were used. The setup includes four different positions or points in time to examine the behavior over time. It was possible to place the parts within a spatial accuracy of 0.85 mm (standard deviation), respectively 1.7 mm for 95% of the errors within this range. The error is mainly influenced by the accuracy of the experimental setup and the tagging of the feature points on the X-ray images.

show abstract

‘Grey-Box-Processing’: a novel validation method for use in vehicle safety applications

Soot

Dlugosch

Fritsch

et al. 2022

Engineering with Computers

View full text Add to dashboard Cite

The ‘Grey-Box-Processing’ method, presented in this article, allows for the integration of simulated and experimental data sets with the overall objective of a comprehensive validation of simulation methods and models. This integration leads to so-called hybrid data sets. They allow for a spatially and temporally resolved identification and quantitative assessment of deviations between experimental observations and results of corresponding finite element simulations in the field of vehicle safety. This is achieved by the iterative generation of a synthetic, dynamic solution corridor in the finite element domain, which is deduced from experimental observations and restricts the freedom of movement of a virtually analyzed structure. The hybrid data sets thus contain physically based information about the interaction (e.g. acting forces) between the solution corridor and the virtually analyzed structure. An additional result of the ‘Grey-Box-Processing’ is the complemented three-dimensional reconstruction of the incomplete experimental observations (e.g. two-dimensional X-ray movies). The extensive data sets can be used not only for the assessment of the similarity between experiment and simulation, but also for the efficient derivation of improvement measures in order to increase the predictive power of the used model or method if necessary. In this study, the approach is presented in detail. Simulation-based investigations are conducted using generic test setups as well as realistic pedestrian safety test cases. These investigations show the general applicability of the method as well as the significant informative value and interpretability of generated hybrid data sets.

show abstract

Data assimilation of structural deformation using finite element simulations and single-perspective projection data based on the example of X-ray imaging

Cited by 4 publications

References 22 publications

Degree of Pelvic Rotation in the Coronal Plane on Postoperative Radiographs Obtained after Total Hip Arthroplasty

Degree of Pelvic Rotation in the Coronal Plane on Postoperative Radiographs Obtained after Total Hip Arthroplasty

A Priori Information Based Time-Resolved 3D Analysis of the Trajectory and Spatial Orientation of Fast-Moving Objects Using High-Speed Flash X-ray Imaging

‘Grey-Box-Processing’: a novel validation method for use in vehicle safety applications

Contact Info

Product

Resources

About