Comparison of dosimetry methods for panoramic radiography: thermoluminescent dosimeter measurement versus personal computer-based Monte Carlo method calculation

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• 作者：Chena Lee ; DDS ; Sam-Sun Lee ; DDS ; PhD ; ^{raylee@snu.ac.kr" class="auth_mail" title="E-mail the corresponding author} ; Jo-Eun Kim ; DDS ; PhD ; Kyung-Hoe Huh ; DDS ; PhD ; Won-Jin Yi ; PhD ; Min-Suk Heo ; DDS ; PhD ; Soon-Chul Choi ; DDS ; PhD
• 刊名：Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology
• 出版年：2016
• 出版时间：March 2016
• 年：2016
• 卷：121
• 期：3
• 页码：322-329
• 全文大小：581 K

文摘

The purpose of this study was to evaluate the patient radiation dose based on panoramic radiography and calculated with personal computer–based Monte Carlo (PCXMC) software compared with thermoluminescent dosimetry (TLD) measurement. We also proposed appropriate input values for dose-determining factors in PCXMC.

Study Design

Tissue-absorbed doses and the effective dose based on panoramic radiography were measured with TLD and with PCXMC under various conditions. The calculated PCXMC doses were compared with those measured with TLD.

Results

The effective doses calculated with PCXMC were higher by 9.55% to 51.24% compared with the doses measured with TLD. Reference points on the Y-axis and Z-axis were the sensitive factors when calculating the effective dose. The differences between the highest and the lowest organ doses were 0.32 and 0.10 mGy, respectively, for PCXMC calculation and TLD measurement.

Conclusions

The effective dose calculated with PCXMC was generally higher than the dose measured by using TLD, and the absorbed doses varied by organ more severely in the PCXMC calculations than in the TLD measurements. The effective dose obtained from PCXMC calculations was dependent on input values for dose-determining factors. Standard values for each dose-determining factor required for the application of PCXMC to panoramic radiography were suggested in this study.