Coolidge tube

Coolidge tube

Etymology: William D. Coolidge, American physician, 1873-1977

a basic type of hot-cathode x-ray tube that, with modern refinements, has been used by radiologists since it was invented in 1913.

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tube,

n a hollow cylindrical structure.

tube, buccal,

n a section of tubing attached to the buccal side of a molar band in a horizontal position, serving as an attachment for the labial arch wire, which slides into the tube.

tube, Coolidge,

n.pr a radiographic tube in which the gas pressure is purposely made so low that it plays no role in the operation of the tube, the operation of which depends on the emission of electrons by the heated filament of the cathode. See also radiographic tube, Coolidge.

tube, discharge,

n a vacuum tube in which a high-voltage electric current is discharged (e.g., a radiographic tube).

tube, endotracheal,

n a plastic tube inserted into the trachea to permit the passage of air to and from the lungs. Tubes are available in varying diameters, depending on the size and age of the patient.

tube, horizontal,

n a metal tube attachment that is placed in a horizontal position on the buccal surface of each anchor molar tooth to allow for the insertion of the labial arch wire.

tube, intubation,

n a tube for insertion into the larynx through the oral cavity.

tube, line focus,

n a radiographic tube in which the target face is about 20 inches (50 cm) from the cathode face. The focal spot is rectangular, with the length approximately three times the width. The acute angle provides an effective focal spot area approximately square and a fraction of the actual area in size.

tube, nasogastric

n a plastic tube inserted through the nose, down the esophagus, and into the stomach. It is used to remove the stomach's contents or to pass food directly to the stomach. Also known as an
NG tube.

tube, protective, housing,

n a radiographic tube enclosure that provides radiation protection.

tube, protective, housing, diagnostic,

n a tube housing that reduces the leakage of radiation to, at most, 0.10 r/hr at a distance of 1 mm from the tube target when the tube is operating at its maximal continuous rated voltage.

tube, protective, housing, therapeutic,

n a tube housing that reduces the leakage of radiation to, at most, 1 r/hr at a distance of 1 m from the tube target when the tube is operating at its maximal continuous rated current for the maximal rated voltage.

tube, right-angle,

n a radiographic tube in which the target is at right angles to the cathode.

tube tooth,

n See tooth, tube.

tube, vertical,

n an attachment that is usually placed on the lingual surface of the anchor band to allow for the insertion of the lingual wire.

tube, radiographic,

n See radiographic tube.