Thomas J. Simonsen
Department of Life Sciences, the Natural History Museum
Friday 7 March 11:00
Sir Neil Chalmers seminar room, Darwin Centre LG16 (below Attenborough studio)
Computer-aided X-ray tomography (CT scanning) has been around as a medical, industrial and scientific tool since the early 1980s. However, it was only after the arrival of scanners with sufficient resolution power (micro-CT) in the early 2000s that the technology was used in the study of non-vertebrate animals. After the first study presenting micro-CT scanning results from insects in 2002, the technology has become a state-of-the-art tool for studies into insect comparative morphology and palaeontology (in particular involving amber fossils). On the other hand, micro-CT scanning has been criticised for not yielding the same resolution as histology, nor having the same ability to distinguish between different types of tissue, partly due to low natural contrast in soft tissue and cuticle. Nevertheless, micro-CT scanning has the advantage of being much faster than traditional methods such as histology, thus allowing for much larger samples to be examined. Furthermore, the method is largely non-destructive and thus ideal for studying rare and valuable specimens. Here I will give a short introduction to micro-CT scanning in entomology and illustrate the technology's uses (and limitations) in the study of insect, focused on forensics entomology, developmental biology and taxonomy/virtual dissections.
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