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Figure 2
(a) A typical low-angle fibre diffraction pattern of normal breast tissue taken with a camera length of 2400 mm. The meridional reflections (vertical) index onto the D-spacing of the type I and type III collagen fibrils. In (b), a plot of the intensities versus position in the equatorial direction, the positions of the stronger peaks are used in the first-order Bessel function analysis to determine the radii of the collagen fibrils. The weak superimposed signal evident at the higher angular positions arises from the 353 nm lattice of collagen type IV. A full description of the measurement of the parameters of this lattice is given by James et al. (1993bBB5). The positions of the various orders of this large lattice were accurately determined from a plot of the second-order derivative of the intensities, obtained in the synchrotron experiments, with respect to position, (c). The pixel readings for a number of the peaks are given on the graph.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 9| Part 2| February 2002| Pages 71-76
doi:10.1107/S0909049502001504
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