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Fig. 3 | BMC Medical Imaging

Fig. 3

From: An unusual tracheal foreign body in a middle-aged male with a 15-year history of coal use: a case report

Fig. 3

Energy spectrum CT was performed to quantitatively measure and compare spectral parameters of the surgically extracted foreign body with bituminous and anthracite coals. a Specimens from the foreign body. b Bituminous coal sample. c Anthracite coal sample. d–f Energy spectrum CT images show that there was very good agreement of the spectral HU curves (d), GSI scatterplot (e) and effective Z-value (f) between the foreign body and the bituminous coal, but poor agreement from those of the anthracite coal

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BMC Medical Imaging

ISSN: 1471-2342

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