Results 321 to 330 of about 1,723,588 (348)

Graphics processing unit-assisted real-time three-dimensional measurement using speckle-embedded fringe.

Applied Optics, 2015
This paper presents a novel two-frame fringe projection technique for real-time, accurate, and unambiguous three-dimensional (3D) measurement. One of the frames is a digital speckle pattern, and the other one is a composite image which is generated by ...
Shijie Feng, Qian Chen, Chao Zuo
semanticscholar   +1 more source

Dimensional Accuracy of Two‐Step Impressions Measured on Scanned Casts in CAD

Journal of Prosthodontics, 2015
AbstractPurposeThe purpose of the study was to find out how light‐body impression material thickness influences the horizontal dimensional accuracy of casts examined on a scanned model.Materials and MethodsCustomized manikin mandibles were used for impression taking with a dual‐phase impression method.
Baráth Zoltán Lajos, Szűts Gábor, Braunitzer Gábor, Radnai Márta   +3 more
openaire   +4 more sources

High accuracy non-contact three dimensional shape measurement

2021
This thesis was scanned from the print manuscript for digital preservation and is copyright the author. Researchers can access this thesis by asking their local university, institution or public library to make a request on their behalf. Monash staff and postgraduate students can use the link in the References field.
openaire   +3 more sources

Accuracy of Three-Dimensional Ultrasound for Thyroid Volume Measurement in Children and Adolescents

Thyroid, 2004
The aim of this study was to estimate accuracy, intraobserver variability, and repeatability of thyroid volume measurement by ultrasound using conventional two-dimensional ellipsoid model (2D US) and manual planimetry of three-dimensional images (3D US).
Christoph Reiners, Valentina Drozd, Andrej Lyshchik   +2 more
openaire   +3 more sources

Measurement accuracy of FBG used as a surface-bonded strain sensor installed by adhesive.

Applied Optics, 2018
Material and dimensional properties of surface-bonded fiber Bragg gratings (FBGs) can distort strain measurement, thereby lowering the measurement accuracy.
G. Xue, X. Fang, Xiukun Hu, Libin Gong
semanticscholar   +1 more source

Three‐Dimensional Accuracy of Digital Static Interocclusal Registration by Three Intraoral Scanner Systems

Journal of Prosthodontics, 2018
PURPOSE Prior studies have defined the accuracy of intraoral scanner (IOS) systems but the accuracy of the digital static interocclusal registration function of these systems has not been reported.
Kuan Yee Wong, R. J. Esguerra, V. A. Chia, Y. Tan, K. Tan   +4 more
semanticscholar   +1 more source

Accuracy of prostate volume measurements in vitro using three-dimensional ultrasound

Academic Radiology, 1996
We assessed the ability of a three-dimensional (3D) ultrasound imaging system to measure accurately prostate volume.Multiple two-dimensional ultrasound images of cadaver prostates scanned in a water bath were reconstructed into three-dimensional (3D) images.
Shidong Tong, Donal B. Downey, Donal B. Downey, Aaron Fenster, Aaron Fenster, Carolyn A. McLean, Tracy L. Elliot   +6 more
openaire   +3 more sources

Accuracy and reproducibility of clinically acquired two-dimensional echocardiographic mass measurements

American Heart Journal, 1989
Left ventricular mass (LVM) measurements made by the truncated ellipsoid algorithm from clinical two-dimensional echocardiograms (2DE) were compared to autopsy weights in 37 patients. All six 2DE instruments were calibrated with an ultrasound phantom to standardize LVM measurements.
Walter E. Finkbeiner, Nelson B. Schiller, Norman H. Silverman, Alain Bouchard, Benjamin F. Byrd   +4 more
openaire   +3 more sources

Two-dimensional digital image correlation for in-plane displacement and strain measurement: a review

, 2009
As a practical and effective tool for quantitative in-plane deformation measurement of a planar object surface, two-dimensional digital image correlation (2D DIC) is now widely accepted and commonly used in the field of experimental mechanics.
B. Pan, K. Qian, H. Xie, A. Asundi
semanticscholar   +1 more source

Accuracy Of Measurement In Coherent Imaging Of Particulates In A Three-Dimensional Sample

SPIE Proceedings, 1985
An out-of-focus coherent image of a transilluminated particle in a transparent field is actually an in-line hologram of that particle. In the Fresnel field of the particle's cross-section, direct measurement of the particle diameter can be achieved with considerable effective defocus -- much greater than the depth of focus with an incoherent imaging ...
P. H. Malyak, Brian J. Thompson
openaire   +2 more sources