Magnification in panoramic radiography

Abstract EN

It is known that the image of panoramic radiograph is larger than the structure it represents.

Materials and methods: To quantify the magnification of the machine used in this study (Cranex 3+), horizontal curved wire of 150 mm.

was fixed by wax on a dry skull between maxilla & mandible.

Other 30 mm.

long wires were fixed vertically, one in the midline & the others in the canine, premolar & molar regions bilaterally.

The skull was positioned as the patient's head positioned so the area to be exposed is precisely within the zone of sharpness, the films were processed & the radiographs were viewed.

Results: A comparison between real & radiographic wires length was done.

The result revealed that horizontal magnification was 6.6-10%, while the vertical magnification was 26.6-30%, but the machine rotation was symmetrical.

Conclusion: Carnex 3+ X-ray machine had a symmetrical rotation with 26.6-30% vertical magnification &6.6-10% horizontal magnification.