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McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.



(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.)


The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.


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.
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References in periodicals archive ?
Eight patients with a history of impaired memory were given two single-photon emission computed tomography (SPECT) exams approximately 8 months apart.
He uses single-photon emission computed tomography and PET only to rule out differential diagnoses.
Single-photon emission computed tomography (SPECT), using a radiolabeled compound that binds to dopamine transporters, is a very sensitive way to measure dopaminergic neurons in the brain.
The image is then produced using single-photon emission computed tomography (SPECT).
In a fourth study of 66 patients with mild dementia, German investigators found perfusion single-photon emission computed tomography scanning sorted out many cases of dementia related to disorders other than Alzheimer's disease.
Cardiologists, radiologists, and other specialists discuss the performance, interpretation, and applications of gated myocardial perfusion single-photon emission computed tomography (SPECT), which has emerged as the predominant nuclear cardiology modality for evaluating patients with known or suspected coronary artery disease.
Plain films and single-photon emission computed tomography scans are useful in diagnosing spondylolysis.
A single-photon emission computed tomography scanner then measured how much of the substance attached to receptors throughout the brain.
Summary: Muscat: The Sultan Qaboos University Hospital yesterday launched the Single-photon Emission Computed Tomography (SPECT) machine ...
Myocardial perfusion gated single-photon emission computed tomography in patients with left bundle branch block: comparison between the end-diastolic images and the ungated images.
Single-photon emission computed tomography (SPECT) evaluates tissue metabolism by detecting electromagnetic radiation emitted from intravenous tracers.
Diagnosis of intracranial lymphoma in patients with AIDS: value of 201-Tl single-photon emission computed tomography. Am J Roentgenol.

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