[Volumetric computed tomography: Principles, parameters].
CT has become the chest imaging technique of reference after chest radiograph performed on the frontline. Technological developments have resulted in shortening the duration of image acquisition to a few seconds, and allow imaging the entire chest in patients unable to take a long breath. This fact-sheet aims to present the basic principles of formation of the CT image, the various embodiments of this imaging technique, and its main pitfalls and constraints.
Pôle d'imagerie, clinique universitaire de radiologie et imagerie médicale, CHU de Grenoble, BP 217, 38043 Grenoble cedex 09, France. AJankowski@chu-grenoble.fr
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D016477:Artifacts; D003287:Contrast Media / Q000008:administration & dosage; D004867:Equipment Design; D045853:Exhalation; D006112:Gravitation; D006801:Humans; D011187:Posture; D013902:Radiography, Thoracic / Q000295:instrumentation / Q000379:methods*; D036542:Tomography, Spiral Computed / Q000295:instrumentation / Q000379:methods; D014057:Tomography, X-Ray Computed / Q000295:instrumentation / Q000379:methods*
D003287:Contrast Media