J Korean Acad Oral Maxillofac Radiol.  1999 Feb;29(1):255-260.

Absorbed dose in the full-mouth periapical radiography, panoramic radiography, and zonography

Affiliations
  • 1Department of Oral and Maxillofacial Radiology College of Dentistry, Seoul National University, Korea.
  • 2Department of Dental Research Institute College of Dentistry, Seoul National University, Korea.

Abstract

PURPOSE: The objective of this study was to evaluate the possibility of substitution of the zonography for the full-mouth periapical radiography in aspect of radiation protection.
MATERIALS AND METHODS
Rando phantom and LiF TLD chips were used for dosimetry. The absorbed doses at brain, skin above the TMJ, parotid gland, bone marrow in the mandibular body, and thyroid gland during the full-mouth periapical radiography, panoramic radiography, and zonography were measured.
RESULTS
From the zonography, the absorbed doses to the brain, the skin over the TMJ, and the parotid gland were relatively high, but the absorbed doses to the bone marrow in the mandibular body and, especially, the thyroid gland were very low.
CONCLUSION
The zonography can be an alternative to the full-mouth periapical radiography in aspect of radiation protection.

Keyword

absorbed dose; dosimetry; TLD; zonography
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