Responsive alignment for X-ray tomography beamlines

2018 ◽  
Vol 25 (6) ◽  
pp. 1774-1779
Author(s):  
Gustavo José Querino de Vasconcelos ◽  
Eduardo Xavier Miqueles ◽  
Gabriel Schubert Ruiz Costa
Keyword(s):  
Rotation Axis ◽  
Three Dimensional ◽  
Image Features ◽  
Ct Reconstruction ◽  
Reconstruction Algorithms ◽  
Parallel Beam ◽  
X Ray ◽  
Three Dimensional Representation ◽  
X Ray Computed

X-ray computed tomography (CT) is an imaging technique intended to obtain the internal structure and three-dimensional representation of a sample. In general, parallel-beam CT reconstruction algorithms require a precise angular alignment and knowledge of the exact axis of rotation position. Highly brilliant X-ray sources with ever-increasing data-acquisition rates demand optimized alignment techniques to avoid compromising in situ data analysis. This paper presents a method to automatically align the angular orientation and linear position of the rotation axis in a tomography setup, correlating image features from different X-ray projections.

scholarly journals X-ray Computed Tomography Data ofAdditive Manufacturing Metrology Testbed (AMMT) Parts: “Overhang Part X4”

2020 ◽  
Vol 125 ◽  
Author(s):  
Max Praniewicz ◽  
Brandon Lane ◽  
Felix Kim ◽  
Christopher Saldana
Keyword(s):  
Additive Manufacturing ◽  
Three Dimensional ◽  
Sensor Data ◽  
X Ray ◽  
Surface Data ◽  
Design Build ◽  
X Ray Computed ◽  
In Situ Sensor ◽  
Stereolithography Files

This document provides details on the data and files generated from post-build X-ray computedtomography (XCT) measurements of the four parts built as part of the “Overhang Part X4” dataset. The “Overhang Part X4” dataset was a three-dimensional (3D) additive manufacturing (AM) build performed on the Additive Manufacturing Metrology Testbed (AMMT) by Ho Yeung and Brandon Lane on June 28, 2019. The files discussed in this document include image sequences for each part, stereolithography files (.STL) of the surface data extracted from XCT. This data is one of a set of “AMMT Process Monitoring Datasets”, as part of the Metrology for Real-Time Monitoring of Additive Manufacturing project at the National Institute of Standards and Technology (NIST). In-situ sensor data, part design, build command and scan strategy data, materials, and associated metadata for this build are described in Ref. [1]. Readers should refer to the AMMT datasets web page for updates.

In Situ Visualization and Quantification of Three-Dimensional Root System Architecture and Growth Using X-Ray Computed Tomography

2014 ◽  
Vol 13 (8) ◽  
pp. vzj2014.03.0024 ◽  
Author(s):  
Nicolai Koebernick ◽  
Ulrich Weller ◽  
Katrin Huber ◽  
Steffen Schlüter ◽  
Hans-Jörg Vogel ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Root System ◽  
System Architecture ◽  
Three Dimensional ◽  
Root System Architecture ◽  
X Ray ◽  
In Situ Visualization ◽  
X Ray Computed

Three dimensional imaging of plant roots in situ with X-ray Computed Tomography

1997 ◽  
Vol 189 (2) ◽  
pp. 167-179 ◽  
Author(s):  
D.A. Heeraman ◽  
J.W. Hopmans ◽  
V. Clausnitzer
Keyword(s):  
Computed Tomography ◽  
Three Dimensional ◽  
Plant Roots ◽  
Three Dimensional Imaging ◽  
X Ray ◽  
X Ray Computed

scholarly journals Three-dimensional Analysis of an In Situ Double-torsion Test by X-ray Computed Tomography and Digital Volume Correlation

2013 ◽  
Vol 53 (7) ◽  
pp. 1265-1275 ◽  
Author(s):  
P. Leplay ◽  
J. Réthoré ◽  
S. Meille ◽  
M.-C. Baietto ◽  
J. Adrien ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Dimensional Analysis ◽  
Three Dimensional ◽  
Torsion Test ◽  
Digital Volume Correlation ◽  
X Ray ◽  
X Ray Computed ◽  
Double Torsion

scholarly journals Process Monitoring Dataset from the Additive Manufacturing Metrology Testbed (AMMT): Overhang Part X4

2020 ◽  
Vol 125 ◽  
Author(s):  
Brandon Lane ◽  
Ho Yeung
Keyword(s):  
Computed Tomography ◽  
Additive Manufacturing ◽  
Real Time ◽  
Process Monitoring ◽  
Three Dimensional ◽  
Ex Situ ◽  
Web Page ◽  
X Ray ◽  
X Ray Computed

This document provides details on the files available in the dataset “Overhang Part X4” pertaining to a three-dimensional (3D) additive manufacturing (AM) build performed on the Additive Manufacturing Metrology Testbed (AMMT) by Ho Yeung and Brandon Lane on June 28, 2019. The files include the input command files, materials data, in-situ process monitoring data, and metadata. This data is one of a set of “AMMT Process Monitoring Datasets”, as part of the Metrology for Real-Time Monitoring of Additive Manufacturing project at the National Institute of Standards and Technology (NIST). Ex-situ part characterization data, including X-ray computed tomography (XCT) measurements, will be provided as it is made available. Readers should refer to the AMMT datasets web page for updates.

Application of X-ray computed tomography to soil science: A literature review

2008 ◽  
Vol 88 (1) ◽  
pp. 1-19 ◽  
Author(s):  
I A Taina ◽  
R J Heck ◽  
T R Elliot
Keyword(s):  
Computed Tomography ◽  
Spatial Configuration ◽  
Energy Levels ◽  
Three Dimensional ◽  
Spatial Arrangement ◽  
Invasive Technique ◽  
Reconstruction Algorithms ◽  
Biotic Factor ◽  
X Ray ◽  
X Ray Computed

The study of the spatial configuration of soil, in its complexity, requires an understanding of the interrelations and interactions between the diverse soil constituents, at various levels of organization. Investigations of the spatial arrangement of the mineral and organic components of soil have benefited from the development of techniques for structural analysis. X-ray computed tomography (CT) is a non-destructive and non-invasive technique that has been successfully used for three-dimensional (3D) examination of soil. Valuable information has been obtained by the application of CT for the description and quantitative measurements of soil structure elements, especially of soil pores and pore network features. In many studies, X-ray CT has been used to investigate the hydro-physical characteristics of the soil, in a functional and temporal manner. A dynamic approach has also been utilized in the evaluation of the biotic factor influence on soil. The analysis of soil solid phases, by X-ray CT, has been challenging due to the similar X-ray attenuation of different solid constituents. However, the use of multiple X-ray energy levels has facilitated the discrimination of minerals in soil. The aim of this review and synthesis is to offer a perspective on the major issues related to application of the technique, general attempted solutions and possible directions in the utilization of X-ray CT in soil research. Relevant scanning parameters, procedures for CT image reconstruction, algorithms for the quantification of soil characteristics and results are presented for each type of application. Key words: X-ray computed tomography, energy level, spatial resolution, segmentation, soil mineral and organic constituents, soil physical and hydro-physical properties, soil biota

Revealing gross three-dimensional structure in the SEM

1987 ◽  
Vol 45 ◽  
pp. 656-657
Author(s):  
Sterling P. Newberry
Keyword(s):  
Freeze Drying ◽  
Three Dimensional ◽  
Dimensional Structure ◽  
Small Object ◽  
Final Solution ◽  
Dimensional Representation ◽  
X Ray ◽  
Three Dimensional Representation ◽  
Freeze Dried ◽  
Critical Point Drying

The beautiful three dimensional representation of small object surfaces by the SEM leads one to search for ways to open up the sample and look inside. Could this be the answer to a better microscopy for gross biological 3-D structure? We know from X-Ray microscope images that Freeze Drying and Critical Point Drying give promise of adequately preserving gross structure. Can we slice such preparations open for SEM inspection? In general these preparations crush more readily than they slice. Russell and Dagihlian got around the problem by “deembedding” a section before imaging. This some what defeats the advantages of direct dry preparation, thus we are reluctant to accept it as the final solution to our problem. Alternatively, consider fig 1 wherein a freeze dried onion root has a window cut in its surface by a micromanipulator during observation in the SEM.

scholarly journals Three‐dimensional X‐ray‐computed tomography of 3300‐ to 6000‐year‐old Citrullus seeds from Libya and Egypt compared to extant seeds throws doubts on species assignments

2021 ◽  
Author(s):  
Katherine A. Wolcott ◽  
Guillaume Chomicki ◽  
Yannick M. Staedler ◽  
Krystyna Wasylikowa ◽  
Mark Nesbitt ◽  
...  
Keyword(s):  
Computed Tomography ◽  
Three Dimensional ◽  
X Ray ◽  
X Ray Computed
Sign in / Sign up

Export Citation Format

Share Document