Relatively less penetrable by electromagnetic radiation; In radiography, radiopaque materials appear light or white on the exposed radiograph.
Not allowing the passage of X rays or other forms of radiation (e.g., lead used as a shield around radioactive equipment, or radiopaque iodine isotopes used as contrast media in producing X-ray images).
Impenetrable by X-rays or other form of radiation.
Any material which blocks the passage of x-rays (see x-ray). Such materials are used in certain types of x-ray examinations; in bowel examinations, the barium enema is radiopaque, and will produce a contrast (shadow) on the film.
Impenetrable to x-rays or other forms of radiation.
Radiopaque is a term used to characterize objects capable of obstructing radiation, notably X-rays and gamma rays. Since numerous body tissues are radiolucent (nearly transparent to X-rays), certain X-ray imaging methods mandate the inclusion of radiopaque substances into the body to enhance the distinct visibility of organs.
Any material that prevents the transmission of X-rays.