Panoramic Ghost Image — NDEB AFK MCQ
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Correct answer: B — The object being positioned between the X-ray source and the centre of rotation
A ghost image in panoramic radiography occurs when a dense object (e.g., metal restoration, earring, cervical spine) is located between the X-ray source and the centre of rotation (on the opposite side from the image receptor during beam rotation). The ghost image appears on the opposite side, higher, magnified, and blurred compared to the real image. Understanding ghost image formation helps avoid misinterpretation and artifact recognition.
Reference: White & Pharoah – Oral Radiology: Principles and Interpretation, 8th ed., 2019