Abstract
Extraoral radiography means that both the image detector and the X-ray machine are placed outside the patient’s mouth. The X-ray source and the image detector have to be aligned in order to generate the desired image quality. There are two ways of obtaining extraoral radiographs: the first way is to work with a stationary X-ray source and image detector and the second is to have the X-ray source and image detector move in synchronicity in opposite directions. The first technique results in a plain radiographic image, while the other technique results in a tomographic image. The latter implies a focal trough, which ideally contains all the tissues one is interested in. More explanation is offered below.
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Aps, J. (2019). Extraoral Radiography in Pediatric Dental Practice. In: Imaging in Pediatric Dental Practice . Springer, Cham. https://doi.org/10.1007/978-3-030-12354-3_4
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DOI: https://doi.org/10.1007/978-3-030-12354-3_4
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