Abstract
Two synchrotron X-ray microscopy methods, phase-contrast micro-radiography (the propagation method) and absorption microCT (high-resolution computed tomography or microtomography), and laser-scanning confocal microscopy (visible wavelength) were used to study a fragment of the keel of a tooth of the sea urchin Lytechinus variegatus. Stripes observed in the phase-contrast images of the fragment were also seen in confocal micrographs. MicroCT showed that the stripes were due to two parallel planar arrays of low-absorption channels within the bulk of the keel. In the phase microradiographs, maximum contrast stripes appear when a channel image from one row coincides with a channel image from the second row; otherwise, contrast is minimal. Long channels do not appear to have been observed previously in keels of sea urchin teeth.
Original language | English (US) |
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Pages (from-to) | 393-397 |
Number of pages | 5 |
Journal | Journal of Synchrotron Radiation |
Volume | 10 |
Issue number | 5 |
DOIs | |
State | Published - Sep 1 2003 |
Keywords
- Calcite
- Computed tomography
- Keel
- Sea urchins
- Teeth
- X-ray microCT
- X-ray phase contrast
ASJC Scopus subject areas
- Radiation
- Nuclear and High Energy Physics
- Instrumentation