Results 141 to 150 of about 9,575 (188)

Synchrotron X-Ray Microtomography

1988
We present results obtained with a new form of 3-D microscopy. The technique is based on tomographic methods and we refer to it as 3-D Microtomography. When used with a tunable X-ray source, it is a powerful diagnostic and research tool for a wide variety of materials studies problems.
K. L. D’Amico, H. W. Deckman, B. P. Flannery, W. G. Roberge   +3 more
openaire   +1 more source

Desktop X‐ray microscopy and microtomography

Journal of Microscopy, 1998
Recent developments in X-ray microtomography have made it possible to miniaturize a CT scanner into a versatile and cost-effective desktop system that fits into any laboratory environment. The possibilities of the technique are demonstrated for a range of applications. It is also shown how an existing scanning electron microscope with an X-ray detector
Sassov, A., Van Dyck, D.
exaly   +5 more sources

X-ray Microtomography of Ceramic Artifacts

MRS Proceedings, 1995
In this paper we describe the analysis of ceramic artifacts with a new type of three dimensional x-ray microscopy which can have micron spatial resolution. The x-ray microscopy is based on a microtomographic technique which reconstructs the three dimensional structure of millimeter sized specimens from high resolution digital radiographs of the ...
H. Dunsmuir, P.B. Vandiver, R.R. Chlanelll, H.W. Deckman, J.H. Hardenbergh   +4 more
openaire   +1 more source

The effect of beam hardening on resolution in x-ray microtomography

SPIE Proceedings, 2004
Spatial resolution describes the ability to distinguish adjacent objects. It is often used as a measure of the quality of an image. By studying the edge of a cylindrical object a value for the spatial resolution is obtained. However, as a consequence of the polychromatic source used in micro-CT, beam hardening will occur which has the effect of ...
Elke Van de Casteele, Dirk Van Dyck, Jan Sijbers, Erik Raman   +3 more
openaire   +2 more sources

Energy-modulated x-ray microtomography

Review of Scientific Instruments, 1988
We describe an instrument for computerized x-ray tomography which can provide fully three-dimensional examination of small samples (a few millimeters to a few centimeters) with resolution variable from 5 to 100 μm. Elemental and chemical-state distributions are obtained with high resolution by modulating the energy of the incident x-ray beam.
John H. Kinney, Quintin C. Johnson, R. Allyn Saroyan, Monte C. Nichols, Ulrich Bonse, Rudolf Nusshardt, Reinhardt Pahl   +6 more
openaire   +1 more source

X-Ray Synchrotron Microtomography

2014
A brief summary of the principles behind X-ray Synchrotron microtomography is reported. Applications to polymer and membrame science are alo described.
openaire   +3 more sources

X-ray energy optimisation in computed microtomography

Physics in Medicine and Biology, 1989
Expressions describing the absorbed dose and the number of incident photons necessary for the detection of a contrasting detail in x-ray transmission CT imaging of a circular phantom are derived as functions of the linear attenuation coefficients of the materials comprising the object and the detail.
openaire   +2 more sources

Development of Quantitative X-Ray Microtomography

MRS Proceedings, 1990
ABSTRACTWe have developed several x-ray microtomography systems which function as quantitative three dimensional x-ray microscopes. In this paper we describe the evolutionary path followed from making the first high resolution experimental microscopes to later generations which can be routinely used for investigating materials.
H. W. Deckman, J. H. Dunsmuir, K. L. D'Amico, S. R. Ferguson, B. P. Flannery   +4 more
openaire   +1 more source

X-ray microtomography: past and present

SPIE Proceedings, 2008
The way in which microtomography developed in the authors' laboratory in the early 1980s is described, together with some background material. Later developments in scanning geometries and detectors, mainly in other laboratories, are described. Some present problems and possible future directions will be considered.
J. C. Elliott, G. R. Davis, S. D. Dover
openaire   +1 more source

Magnified hard X-ray microtomography

2000 IEEE Nuclear Science Symposium. Conference Record (Cat. No.00CH37149), 2002
Summary form only given. In the field of hard X-ray microtomography one goal is the enhancement of resolution. Several ways can be followed to obtain this objective. One possibility is the use of high-resolution X-ray films or detector screens coupled with a microscope optical system.
C. Rau, T. Weitkamp, A. Snigirev, C.G. Schroer, J. Tummler, B. Lengeler   +5 more
openaire   +1 more source