Shadow
Shadow (medicine)
Shadow (pronounced: /ˈʃædoʊ/) in the medical context, refers to an area of darkness or reduced radiopacity on a radiograph or other image, often indicating the presence of an abnormality or disease.
Etymology
The term 'shadow' in this context is derived from the Old English 'sceadu', which means 'shade, darkness, or obscurity'. It has been used in the medical field to describe the appearance of certain abnormalities or diseases on radiographic images since the early 20th century.
Related Terms
- Radiograph: An image produced on a sensitive plate or film by X-rays, gamma rays, or similar radiation, and typically used in medical examination.
- Radiopacity: The property of a substance that allows it to absorb or block the passage of radiant energy, especially X-rays.
- Abnormality: A condition that is not normal for the organism, and that may indicate the presence of a disease or disorder.
- Disease: A particular abnormal condition that negatively affects the structure or function of all or part of an organism, and that is not due to any immediate external injury.
See Also
External links
- Medical encyclopedia article on Shadow
- Wikipedia's article - Shadow
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