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European Radiology Experimental
Fig. 3 | European Radiology Experimental

Fig. 3

From: Radiographic analysis and virtual cleaning of a bioarchaeological remain enclosed in mineral deposits from a limestone cave

Fig. 3

Radiographic analysis and virtual removal of speleothemic deposits. a Segmentation of the incrusted bone fragment was a particular challenge due to the sometimes very similar densities of the partially fossilised bone fragment and the surrounding calcite mineral. b–d A combined manual and HU-threshold based segmentation protocol, previously developed for such applications by one of the authors (P.E.), was therefore applied. e Osteological measurements from one of the virtual 3D bone models. The model differing the least from the remaining two models was chosen (Reader 1). Correlative cross-sections from the CT scan are represented. The mean difference between virtual osteological measurements and direct radiological measurements is 0.4 mm ± 0.3 mm (mean ± standard deviation)

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