Cardiothoracic Imaging
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Tomographic imaging techniques in diagnostic imaging


Tomography is a "slicing" of the body into various sections and in various view planes. The tomographic sections when viewed in sequence or integrated by a computer allow the display and understanding of 3-dimensional anatomy.

Tomography versus projection
Medical images can be understood to belong to one of two main groups: tomographic or projection techniques. Projection techniques, such as x-ray films are "shadowgram-like" transilluminations of the body. Because of the nature of trans-illumination, various tissues are imaged as overlapping each other and often need multiple views (thus the PA and Lateral) for visual under-standing.


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December 18, 2004 (PL)
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