![]() ![]() The patient positioning is very critical in regard to both sharpness and distortions. Finally a compromise is selected by each manufacturer and results in magnification factors which vary strongly along the film (15%-30%). It is impossible to select an ideal movement as the anatomy varies very much from person to person. Also those moving solutions try to project the teeth arch as orthogonally as possible. The manufacturers propose different solutions for moving the arm, trying to maintain constant distance between the teeth to the film and generator. The arm moves and its movement may be described as a rotation around an instant center which shifts on a dedicated trajectory. Also the height of that beam covers the mandibles and the maxilla regions. The X-ray source is rectangular collimated beam. The patient's skull sits between the X-ray generator and the film. Other nonproprietary names for a panoramic radiograph are dental panoramic radiograph and pantomogram Abbreviations include PAN, DPR, OPT, and OPG (the latter, based on genericizing a trade name, are often avoided in medical editing).ĭental panoramic radiography equipment consists of a horizontal rotating arm which holds an X-ray source and a moving film mechanism (carrying a film) arranged at opposed extremities. Panoramic radiography is a form of focal plane tomography thus, images of multiple planes are taken to make up the composite panoramic image, where the maxilla and mandible are in the focal trough and the structures that are superficial and deep to the trough are blurred. ![]() It shows a two-dimensional view of a half-circle from ear to ear. A panoramic radiograph is a panoramic scanning dental X-ray of the upper and lower jaw.
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