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a radiographic technique in which the film and x-ray tube are moved in opposite directions to produce a more distinct image of a selected body plane. The process has the effect of blurring adjacent body structures during exposure. Also called tomography.
the making of film records (radiographs) of internal structures of the body by exposure of film specially sensitized to x-rays or gamma rays.
a special technique to show in detail images and structures lying in a predetermined plane of tissue, while blurring or eliminating detail in images in other planes; various mechanisms and methods for such radiography have been given various names, e.g. laminagraphy, tomography, etc.
the use of means of exaggerating the differences in density of tissues or organs or intraluminal filling defects, usually by the introduction of contrast agents.
double contrast radiography
see double contrast.
small non-screen film is placed in the mouth and x-rays are directed from outside the mouth. Used to assess alveolar bone and roots of teeth.
mucosal relief radiography
a technique for revealing any abnormality of the intestinal mucosa, involving injection and evacuation of a barium enema, followed by inflation of the intestine with air under light pressure. The light coating of barium on the inflated intestine in the radiograph reveals clearly even small abnormalities.
that in which a narrow beam of neutrons from a nuclear reactor is passed through tissues; especially useful in visualizing bony tissue.
the making of several exposures of a particular area at arbitrary intervals.
the making of localized instantaneous radiographic exposures during fluoroscopy.
positioning to intentionally place stress on structures being radiographed; most commonly used in the diagnosis of spinal disorders such as atlantoaxial instability, wobbler syndrome and lumbosacral instability.