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. 2010 Feb;39(2):72–78. doi: 10.1259/dmfr/68589458

Table 4. Image quality of foreign bodies in various regions observed via CT.

CT Visibility on bone Visibility in muscle Visibility in air
Metal ++++ ++++ ++++
Glass +++ ++++ ++++
Wood 0 + ++
Stone ++++ ++++ ++++
Acrylic + ++ ++
Graphite +++ ++++ ++++
Bakelite ++ ++ ++++