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Key points. An X-ray image is a map of X-ray attenuation. Attenuation of X-rays is variable depending on density and thickness of tissues. Describing X-ray abnormalities in terms of density may help in determining the tissue involved.
- X-ray Safety
Diagnostic investigations typically involve doses between...
- X-ray Production
The X-ray spectrum. As a result of characteristic and...
- Tutorial Conclusion
The X-ray beam; Tissue densities; X-ray safety; Tutorial...
- X-ray Safety
Jan 8, 2016 · Skin is an organ with high turnover dermal cells and lower turnover stromal cells. Skin shows early effects, a period of apparent healing and then in the case of high doses, a late, serious, and difficult-to-heal injury.
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- Gross Anatomy
- Development
At the superior and anterior part of the mastoid process the air cells are large and irregular and contain air, but toward the inferior part they diminish in size, while those at the apex of the process are frequently quite small and contain marrow. Occasionally, they are entirely absent. Mastoid air cells communicate with the middle ear via the ma...
Mastoid process develops at birth, from petromastoid part of temporal bone and fused with squamozygomatic part and tympanic part of the temporal bone. The growth of mastoid process accelerates between age two to five, and completes by age six 5. Pneumatization of mastoid process begins at infancy, and completes at the age of six 5.
In x-ray imaging (radiography and CT) the contrast between the tissues in the image is generated by the difference between the x-ray attenuation (influenced by density and atomic number). In this post we demonstrate the material dependence for x-ray attenuation.
Apr 4, 2019 · Although the potential of hard X-ray microscopy has been demonstrated, examining cell-cell interactions within macroscopic tissue samples requires an X-ray microscope that can be “zoomed” to the cell of interest.
Ultrasound combines excellent ability for deep penetration into soft tissues with very good spatial resolution, with only a few exceptions (i.e. those involving overlying bone or gas).
