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Absorbed doses with intraoral radiography. Function of various technical parameters
Y Hayakawa1, H Fujimori, K Kuroyanagi
1Department of Oral and Maxillofacial Radiology, Tokyo Dental College, Chiba, Japan.
Oral Surgery, Oral Medicine, and Oral Pathology
|October 1, 1993
Summary
Dental radiography technical parameters affect radiation dose. Increasing tube voltage or filtration slightly increased dose, while tighter collimation or longer cone length decreased absorbed dose to organs like the parotid and thyroid glands.
Area of Science:
- Radiological Physics
- Medical Imaging
- Radiation Dosimetry
Background:
- Dental radiography is crucial for diagnosis.
- Minimizing radiation exposure to non-target organs is essential.
- Understanding the impact of technical parameters on organ dose is vital for patient safety.
Purpose of the Study:
- To quantify the absorbed dose to the parotid and thyroid glands during dental radiography.
- To evaluate the influence of specific technical parameters on organ radiation dose.
Main Methods:
- Radiographs were taken of a Rando phantom's maxillary incisor and mandibular molar regions.
- Thermoluminescence dosimetry was used to measure parotid and thyroid gland doses.
- Tube voltage, total filtration, mAs, collimation, and cone length were systematically varied.
Main Results:
- Increased tube voltage or total filtration led to a slight increase in absorbed dose.
- Tighter beam collimation resulted in decreased absorbed dose.
- Increased cone length also led to a decrease in absorbed dose.
Conclusions:
- Technical parameters in dental radiography significantly influence radiation dose to the parotid and thyroid glands.
- Optimizing collimation and cone length can reduce radiation exposure.
- Further research can refine protocols for dose reduction in dental imaging.