However, for phase-contrast tomography it is advantageous that the orientation of the grating lines coincides with the axis of rotation. Lauridsen, T. Author information Article notes Copyright and License information Disclaimer. Langenegger E. Finnegan M, Faust MA. Increased acetabular subchondral bone density is associated with cam-type femoroacetabular impingement. Rather than looking at a medical device, we will examine a pathological specimen that challenges a contemporary assumption. Sign up. Comput Biol Med. Momose, A.
ArtiFacts Femoroacetabular Impingement—A New Pathology
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Close banner Close. Physics in medicine and biology 57—61, doi: Markus S. The possibility to obtain information about unresolvable structures has already seen a lot of interest for both medical and material science applications.
Vogel, J. Figure 3.
Phase contrast imaging can be several orders of magnitude more sensitive to changes within an object than attenuation-based imaging 1.
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Furthermore, its rather simple geometrical shape allows for a clear visualization. Subjects Imaging techniques X-rays. One important criterion for a correct tomographic reconstruction is the rotational invariance of the measured signal Weitkamp, T.
COLORED DRAGONFLY WINGS CRAFT
|In this paper, we show that it is possible to perform this kind of dark-field tomography with common Talbot-Lau interferometer setups by reducing the reconstruction to several smaller independent problems.
Pfeiffer et al. Download citation.
Directional x-ray dark-field imaging of strongly ordered systems. Reprints and Permissions.
As the sphere consists only of a thin layer of plastic, it does not contribute significantly to the dark-field and attenuation signals.
On the origin of visibility contrast in x-ray Talbot interferometry. Received Dec 9; Accepted Jan Supplementary material 1 MOV kb 12M, mov.
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Hard-X-ray dark-field imaging using a grating interferometer. Feldkamp, J. Non-iterative Directional Dark-field Tomography.
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|The complementarity of the information recorded in the individual volumes can be seen clearly. Slices of the reconstructed volumes are shown in Fig. Quantitative grating-based x-ray dark-field computed tomography. Sign up. Many of these bones have been studied by anthropologists using classical methods for reasons of scant interest to surgeons [ 6811 ].
First, we reconstructed a full 3-D model of the pelvis based on the available fragments with established anthropological methods.