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Penetrating foreign bodies
The standard radiographs
Alternative imaging to consider
Regularly overlooked foreign bodies
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Glass hidden by bone.
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Deeply penetrating FBs.
Abbreviations
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CT, computer tomography;
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FB, foreign body;
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MRI, magnetic resonance imaging;
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PA, posterior-anterior.
Appearances on plain radiographs
Glass
All glass is radio-opaque. Visibility of glass is not dependent on its lead content .
The radiographic density of the different types of glass does vary. Imaging technique is important. A soft tissue exposure is essential.
Zooming on a digital image is often necessary, otherwise very small fragments are easily overlooked.
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