In panoramic radiography, the horseshoe-shaped zone of sharpness where an object would be imaged in acceptable detail is called the:

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Panoramic radiography is based on tomography , where the x-ray beam is focused on an image layer, called a focal trough ; here structures will be recorded with relative clarity , while those structures located outside this image layer will be blurred into ghost images.

In Panoramic Radiography, the Horseshoe-Shaped Zone of Sharpness Where an Object