Radiograph shows a radio-opaque shadow in pelvis | Download Scientific Diagram
References in An Unusual Radio-Opaque Shadow in the Chest Radiograph After Coronary Artery Bypass Surgery - Journal of Cardiothoracic and Vascular Anesthesia
A radio opaque ring can be used to measure the location of… | Flickr
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Radio-opaque — Conseil Dentaire Dr.Hauteville
Plain X-ray showing radio-opaque part of the pencil inside the trachea | Download Scientific Diagram
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À propos d'une image radio-opaque du maxillaire – L'Information Dentaire