Computer simulations of X-ray phase-contrast images and microtomographic observation of tubules in dentin.

Journal of Synchrotron Radiation
T S ArgunovaE D Nazarova

Abstract

An investigation of the problems of X-ray imaging of dentinal tubules is presented. Two main points are addressed. In the first part of this paper, the problem of computer simulating tubule images recorded in a coherent synchrotron radiation (SR) beam has been discussed. A phantom material which involved a two-dimensional lattice of the tubules with parameters similar to those of dentin was considered. By a comparative examination of two approximations, it was found that the method of phase-contrast imaging is valid if the number of tubules along the beam is less than 100. Calculated images from a lattice of 50 × 50 tubules are periodic in free space but depend strongly on the distance between the specimen and the detector. In the second part, SR microtomographic experiments with millimetre-sized dentin samples in a partially coherent beam have been described. Tomograms were reconstructed from experimental projections using a technique for incoherent radiation. The main result of this part is the three-dimensional rendering of the directions of the tubules in a volume of the samples. Generation of the directions is possible because a tomogram shows the positions of the tubules. However, a detailed tubule cross-section structure...Continue Reading

References

Jul 2, 2003·Journal of Biomedical Materials Research. Part a·V ImbeniR O Ritchie
Oct 30, 2007·Dental Materials : Official Publication of the Academy of Dental Materials·Charles R Parkinson, Alexander Sasov
Nov 3, 2009·Dental Materials : Official Publication of the Academy of Dental Materials·Paul ZaslanskyPeter Fratzl
Jun 9, 2014·Materials Science & Engineering. C, Materials for Biological Applications·Dmitry ZaytsevPeter Panfilov
Jun 28, 2014·Journal of Synchrotron Radiation·V G KohnA Snigirev
Nov 14, 2015·Scientific Reports·William VågbergHans M Hertz

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