Can you spot the vague opacity in the centre of the chest X-ray above.Picture below outlines the opacity for you.
Whenever an opacity is seen in a chest X-ray, it is important to consider external artifact that can give rise to such appearance. Radiographically, anything external (on the skin) will give a lucent halo around the opacity due to normal air that is trapped between the object and the skin. In this case, the patient was actually wearing pendant made of clothing material.
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