It is uniformly radiopaque (or lighter). They are usually noticed by radiographic examination and appeared as round or ovoid radiopaque lesions. It is the only inhalational anesthetic containing bromine, which makes it radiopaque. On an x-ray, cysts appear as radiolucent (dark) areas with radiopaque (white) borders. In both CT and MRI a rhinolith will appear like a radiopaque irregular material. It appears as a radiopaque (light area) around a tooth, usually a premolar or molar. Some 60% of all renal stones are radiopaque. More chronic lesions may show lytic (radiolucent) or sclerotic (radiopaque) changes, or both. Ipodate sodium (sodium iopodate) is an iodine-containing radiopaque contrast media used for X-rays. Prior to the mamography itself, a radiopaque substance is injected into the duct system. Some sponges include a radiopaque strip so that they can be located by X-ray. Some variations are also radiopaque which makes it good for X ray cavity detection. Bromide is also radiopaque, so an abdominal X-ray may also help in the diagnosis.