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rayos X

X-rays are a form of radiation, like light or radio waves, which can be focused into a beam, much like a flashlight beam. Unlike a beam of light, however, X-rays can pass through most objects, including the human body. When X-rays strike a piece of photographic film, they can produce a picture. Dense tissues in the body, such as bones, block (absorb) many of the X-rays and appear white on an X-ray picture. Less dense tissues, such as muscles and organs, block fewer of the X-rays (more of the X-rays pass through) and appear in shades of gray. X-rays that pass only through air appear black.

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rayos x
Art history; Visual arts

Fotografía que usa rayos x. Las imágenes en rayos x se han utilizado para identificar lo que yace bajo la superficie de una pintura, incluyendo obras o estudios y bosquejos ...

rayos gamma
Chemistry; General chemistry

A very high energy form of electromagnetic radiation , typically with wavelengths of less than 3 pm. Gamma rays are produced by certain nuclear decay processes, and are used to ...

rayos gamma
Astronomy; Planetary science

Gamma rays are like the light we see with our eyes, the x-rays used to probe our bodies in search of problems, and the radio waves that our television sets translate into inane ...

tumor
Health care; Hospitals

An abnormal mass of tissue. Tumors are a classic sign of inflammation, and can be benign or malignant (cancerous). There are dozens of different types of tumors. Their names ...

patógeno
Health care; Hospitals

An agent of disease. Pathogens include bacteria, viruses, fungi, and protozoa.

úlcera
Health care; Hospitals

An area of tissue erosion, for example, of the skin or lining of the gastrointestinal (GI) tract. Due to the erosion, an ulcer is concave. It is always depressed below the level ...

prótesis
Health care; Hospitals

An artificial substitute or replacement of a part of the body such as a tooth, eye, hip, knee, leg, arm, etc. A prosthesis is designed for both functional and/or cosmetic reasons.

abceso
Health care; Hospitals

A local accumulation of pus anywhere in the body.

calidad de vida
Health care; Hospitals

An important consideration in medical care, quality of life refers to the ability to enjoy normal life activities. Some medical treatments can seriously impair quality of life ...

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