Explain the concept of linear tomography to include the terms fulcrum, object, plane, tomographic angle, and section thickness (tomographic Layer).
The fulcrum is an imaginary pivot point about which the x-ray tube and image move. The fulcrum lies in the object plane. and only those structures within the plane are focused. The angle of movement of the x-ray tube determines section thickness with larger angles resulting in thiner section thickness (or tomographic angles). The larger the angle, the more the blurred the images outside the object plane. The further from the object plane a structure is, the more blurred the image of that structure.