OSCE Practice – Radiography: Panoramic (OPG) Errors

Practise recognising and correcting panoramic radiography errors in a dental setting, following NEBDN OSCE expectations.

Scenario

A panoramic (OPG) radiograph is taken. On review, the anterior teeth appear blurred and narrowed, and a ghost image of earrings is visible.

Your Task

  • Identify common OPG errors
  • Determine the cause of image distortion
  • Apply corrective positioning measures
  • Recognise patient-related factors affecting image quality
  • Support accurate radiographic practice

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Key Learning Points

  • Blurred images are often caused by patient movement during exposure
  • If the tongue is not placed against the palate, a radiolucent air space appears over the maxillary apices
  • Ghost images appear on the opposite side, higher, and magnified compared to the original object
  • Widened and blurred anterior teeth indicate the patient is positioned too far forward
  • Narrowed and blurred anterior teeth indicate the patient is positioned too far backward
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