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[Dose measurements comparing conventional and digital panoramic radiography].
H Visser1, K P Hermann, S Bredemeier
1Abteilung Parodontologie, Georg-August-Universität Göttingen, Deutschland.
Mund-, Kiefer- Und Gesichtschirurgie : MKG
|September 20, 2000
Summary
Direct digital panoramic radiography significantly reduces patient radiation exposure compared to conventional methods. Digital units resulted in effective doses of 5-14 microSv, while conventional units ranged from 16-21 microSv.
Area of Science:
- Radiology
- Medical Imaging
- Radiation Dosimetry
Background:
- Panoramic radiography is a common dental imaging technique.
- Patient radiation exposure is a key consideration in diagnostic imaging.
Purpose of the Study:
- To measure and compare patient radiation exposure between direct digital and conventional panoramic radiography.
Main Methods:
- Dose measurements were performed on an anthropomorphic phantom using thermoluminescence detectors.
- Panoramic radiographs were acquired with three conventional and two direct digital devices under routine clinical conditions.
- Effective doses were calculated based on absorbed doses at various internal and surface locations.
Main Results:
- Highest energy doses were observed at the parotid gland, mandibular angle, submandibular gland, and neck skin.
- Conventional panoramic radiography resulted in effective doses of 16-21 microSv.
- Direct digital panoramic radiography yielded effective doses of 5-14 microSv.
Conclusions:
- Direct digital panoramic radiography offers reduced patient exposure compared to conventional techniques.
- The degree of dose reduction varies by device.
- Digital panoramic radiography's dose reduction is generally less pronounced than that seen with intraoral digital imaging devices.