[Exposure distribution and total risk in intraoral source radiography]

Area of Science:

• Radiological Physics
• Medical Imaging
• Radiation Dosimetry

Context:

• Intraoral radiography is a common dental diagnostic tool.
• Accurate measurement of radiation exposure is crucial for patient safety.
• Understanding dose distribution helps optimize imaging protocols.

Purpose:

• To measure and map radiation exposure distribution in the oral mucosa and skin of the head and neck during intraoral radiography.
• To estimate the total radiation risk to patients based on measured organ doses.
• To evaluate the effectiveness of lead shielding in reducing radiation exposure.

Summary:

• Film dosimetry and thermoluminescence dosimeters were used to measure exposure on oral mucosa and skin.
• Significant variations in exposure were observed, with higher doses in the posterior regions of the oral cavity.
• Maximum exposure levels reached 1800 mR on the oral mucosa and 100 mR on the skin surface.
• Lead-lining of the applicator was found to be effective in reducing radiation exposure.
• Organ doses were measured using a thermoluminescence dosimeter and an ionizing chamber.
• Total risk was estimated based on these measured doses.

Impact:

• Provides essential data for optimizing intraoral radiography techniques to minimize patient radiation dose.
• Informs the development of radiation protection guidelines for dental professionals and patients.
• Highlights the importance of lead shielding in reducing scatter radiation during dental X-rays.
• Contributes to a better understanding of radiation risk assessment in diagnostic radiology.