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(also body section roentgenography or sectional radiography), a technique of roentgenological study that is used to produce a photograph of a layer lying at a specific depth in the object under study.

Ordinary roentgenography results in the production on film of an overall image, from which it is not always possible to determine the true shape and size of a formation or the depth at which it lies. The production of a roentgenogram of a single layer is based on the movement of two of the three components (the X-ray tube, the X-ray film, and the object of study). In the most common technique, the patient is motionless, and the X-ray tube and film magazine move around him in opposite directions. The use of tomography makes possible the study of the trachea, the bronchi, and the blood vessels and the detection of infiltrates and cavities of the lungs, calculi in the kidney, gallbladder, and bile ducts, and tumors in the adrenals and urinary system. The combined use of X-ray contrast media and tomography (sectional bronchography, urography, and so on) is highly effective.


Gladysz, B. Tomografiia v klinicheskoi praktike. Warsaw, 1965. (Translated from Polish.)



An X-ray technique that shows a single plane (slice) of the object under examination, typically a part of the human body. See CAT scan.
References in periodicals archive ?
However, with the increasing power of computers combined with increased resolution and sensitivity of CCD and CMOS sensors it has become realistic to apply tomographic PIV (3 component volume PIV) techniques to a large volume.
Coronary computer tomographic angiography was performed through 64 slice multidetector CT scanner.
Even the closer points to the rotation centre have such a high linear velocity that their associated images are obscured at once, and instead of gradual blurring, only a thin clear slice of certain tissue image stands out without any tomographic blurring that usually occurs in longitudinal tomography.
In this section, the performance of the proposed fast near-field imaging method implemented with circular spectrum approach is illustrated with comparison to the near-field tomographic method.
The PIXcel3D detector can perform 0D, 1D, 2D, and 3D tomographic measurements.
C) Posterior view three-dimensional reconstruction of the computed tomographic angiogram of the left persistent sciatic artery.
Importing and processing of tomographic images is an essential step to obtain the virtual model of the ankle-foot anatomical system.
BALTIMORE -- A panel of Medicare advisers has tentatively expressed support for the use of computed tomographic colonography to screen for colorectal cancer in average-risk Medicare beneficiaries.
Computerized tomographic (CT) colonography, also known as virtual colonoscopy, is comparable to standard colonoscopy, which uses a long, flexible tube with a camera to view the lining of the colon, in its ability to accurately detect cancer and precancerous polyps and could serve as an initial screening exam for colorectal cancer, according to the results of the American College of Radiology Imaging Network (ACRIN) National CT Colonography Trial.
Computed tomographic colonography could get a boost, thanks to the Centers for Medicare and Medicaid Services' proposal to pay for the nascent colorectal cancer screening technology.
The new joint consensus guidelines on screening for colorectal cancer recommend against the use of the most common form of the fecal occult blood test and add stool DNA testing and computed tomographic colonography to a list of the recommended screening options.