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1.

X-Rays

Penetrating electromagnetic radiation emitted when the inner orbital electrons of an atom are excited and release radiant energy. X-ray wavelengths range from 1 pm to 10 nm. Hard X-rays are the higher energy, shorter wavelength X-rays. Soft x-rays or Grenz rays are less energetic and longer in wavelength. The short wavelength end of the X-ray spectrum overlaps the GAMMA RAYS wavelength range. The distinction between gamma rays and X-rays is based on their radiation source.

Year introduced: 1991(1975)

2.

Radiography

Examination of any part of the body for diagnostic purposes by means of X-RAYS or GAMMA RAYS, recording the image on a sensitized surface (such as photographic film).

3.

Gamma Rays

Penetrating, high-energy electromagnetic radiation emitted from atomic nuclei during NUCLEAR DECAY. The range of wavelengths of emitted radiation is between 0.1 - 100 pm which overlaps the shorter, more energetic hard X-RAYS wavelengths. The distinction between gamma rays and X-rays is based on their radiation source.

Year introduced: 1991(1975)

4.

Mass Chest X-Ray

X-ray screening of large groups of persons for diseases of the lung and heart by means of radiography of the chest.

5.

Tomography, X-Ray Computed

Tomography using x-ray transmission and a computer algorithm to reconstruct the image.

Year introduced: 1980

6.

diagnostic imaging [Subheading]

Used for the visualization of an anatomical structure or for the diagnosis of disease. Commonly used imaging techniques include radiography, radionuclide imaging, thermography, tomography, and ultrasonography

Year introduced: 2017(1967)

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