Definition
'Radio-opacity' (often written as 'radiopacity') describes how well a substance blocks X-rays or other types of radiation. Think of it like how dense something is to X-rays. π Bone is highly radio-opaque and appears bright on an X-ray image, while air is not and appears dark. Doctors use this to see inside your body without surgery. Radiopaque materials prevent radiation from passing through, while radiolucent materials allow it to pass through more easily. It's a key concept in medical imaging.