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Evaluation of a method to predict positioning errors in orthopantomography using cephalography.

S Imajo1, M Honda2, Y Tanabe3

  • 1Division of Radiology, Medical Support Department, Okayama University Hospital, 2-5-1, Shikata, Kita, Okayama, 700-8525, Japan; Graduate School of Health Sciences, Department of Radiological Technology, Okayama University, 2-5-1, Shikata, Kita, Okayama, 700-8525, Japan.

Radiography (London, England : 1995)
|September 18, 2025
PubMed
Summary
This summary is machine-generated.

Cephalometric analysis can predict and reduce positioning errors in orthopantomography. This improves diagnostic accuracy by tailoring patient positioning to individual skeletal anatomy, enhancing radiographic image quality.

Keywords:
CephalogramFrankfort horizontal planeOcclusal plane angleOrthopantomogramPanoramic radiographyPatient positioning

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Area of Science:

  • Dental radiology
  • Medical imaging analysis

Background:

  • Radiographic image quality is crucial for accurate diagnosis and treatment planning.
  • Orthopantomography and cephalometric analysis are key diagnostic tools in dentistry.

Purpose of the Study:

  • To assess the relationship between orthopantomography and cephalometric analysis in predicting positioning errors.
  • To improve the accuracy and quality of orthopantomographic imaging.

Main Methods:

  • Evaluated four human head phantom types and 300 adult patients undergoing orthopantomography.
  • Analyzed correlations between Frankfort horizontal plane and occlusal plane angles in orthopantomograms and cephalograms.
  • Compared cephalogram condylar plane-corpus line angle with orthopantomogram measurements.

Main Results:

  • Strong negative correlation (r < -0.9) between Frankfort and occlusal plane angles in phantoms; moderate (r < -0.4) in clinical orthopantomograms.
  • Occlusal plane angle in orthopantomograms correlated with differences in Frankfort and condylar plane-corpus line angles in cephalograms (phantoms).

Conclusions:

  • Individualized patient positioning based on cephalometric analysis can minimize errors and enhance orthopantomography image quality.
  • Integrating cephalometric analysis into positioning protocols improves diagnostic reliability and reduces the need for retakes.