On a panoramic radiograph, a patient is wearing earrings (one with 2 circular elements, one with 3). A radiopaque image of circular elements appears projected inside the LEFT maxillary sinus. What does this represent?

A ghost (artifact) image of the patient's RIGHT earring, projected to the opposite side, magnified, and superimposed higher up due to the panoramic ghosting phenomenon
The patient's actual left earring in its true anatomic position
A foreign body genuinely located inside the left maxillary sinus
Calcified lymph nodes

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Correct answer: A. A ghost (artifact) image of the patient's RIGHT earring, projected to the opposite side, magnified, and superimposed higher up due to the panoramic ghosting phenomenon

Ghost images in panoramic radiography are a well-known artifact: a dense radiopaque object on one side of the patient is captured twice during the rotational exposure, producing a real image (correctly positioned) PLUS a ghost image that appears on the OPPOSITE side, magnified, blurred, and positioned higher than the real structure — frequently superimposed over areas like the maxillary sinus or contralateral ramus.

Practice Anatomy & Histology questions Anatomy & Histology study notes

On a panoramic radiograph, a patient is wearing earrings (one with 2 circular elements, one with 3). A radiopaque image of circular elements appears projected inside the LEFT maxillary sinus. What does this represent?

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