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Related Experiment Video

Updated: Feb 11, 2026

X-ray Dose Reduction through Adaptive Exposure in Fluoroscopic Imaging
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Effective dose reduction using collimation function in digital panoramic radiography and possible clinical

Daniel Benchimol1, Juha Koivisto2, Nils Kadesjö1,3

  • 11 Section of Oral Diagnostics and Surgery, Division of Oral Diagnostics and Rehabilitation, Department of Dental Medicine, Karolinska Institutet , Huddinge , Sweden.

Dento Maxillo Facial Radiology
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Summary

Collimation in panoramic imaging significantly reduces effective dose, with potential reductions up to 86.9%. This technique should be standard practice when diagnostic needs allow, minimizing radiation exposure for patients.

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Area of Science:

  • Radiological Sciences
  • Medical Imaging
  • Radiation Protection

Background:

  • Panoramic radiography is a common dental imaging technique.
  • Effective dose from panoramic imaging can vary significantly based on protocol.
  • Optimizing radiation dose is crucial in diagnostic radiology.

Purpose of the Study:

  • To evaluate the effective dose of a full-size panoramic image and nine collimated protocols.
  • To estimate the potential dose reduction in clinical dentomaxillofacial radiology settings.

Main Methods:

  • Determined effective dose using International Commission on Radiological Protection 2007 guidelines on an anthropomorphic phantom.
  • Utilized metal-oxide semiconductor field-effect transistor dosemeters for measurements.
  • Conducted a retrospective analysis of 252 patient referrals to assess dose reduction with collimation.

Main Results:

  • A full-size panoramic radiograph had an effective dose of 17.6 µSv.
  • Dose reduction for collimated images ranged from 4.5% to 86.9%.
  • Potential total dose reduction was 35%; 61% of referrals could achieve a 40.3% dose reduction.

Conclusions:

  • Effective dose can be reduced without compromising diagnostic information in the area of interest.
  • Routine application of the collimation feature in panoramic imaging is recommended when diagnostically appropriate.