The Tomographic Principle is based on the synchronous movement of two of the three elements in a tomographic system : the tube, the object, and the image receptor.The tube and the image receptor move during the exposure in opposite directions around a stationary fulcrum, the pivot point.
The tube and the image receptor are attached by a rod as described in the equipment section of this blog.
The objecct to be imaged is placed at the level of the fulcrum or pivot point. The area placed at the pivot point will not be blurred, because it has not moved in relationship to the tube and image receptor. Thus tomography enhances visualization of superimposed structures.
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