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KMID : 1024020220520030283
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Imaging Science in Dentistry
2022 Volume.52 No. 3 p.283 ~ p.288
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Correlation analysis between radiation exposure and the image quality of cone-beam computed tomography in the dental clinical environment
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Song Chang-Ho
Yeom Han-Gyeol
Kim Jo-Eun
Huh Kyung-Hoe
Yi Won-Jin
Heo Min-Suk
Lee Sam-Sun
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Abstract
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Purpose: This study was conducted to measure the radiation exposure and image quality of various cone-beam computed tomography (CBCT) machines under common clinical conditions and to analyze the correlation between them.
Materials and Methods: Seven CBCT machines used frequently in clinical practice were selected. Because each machine has various sizes of fields of view (FOVs), 1 large FOV and 1 small FOV were selected for each machine. Radiation exposure was measured using a dose-area product (DAP) meter. The quality of the CBCT images was analyzed using 8 image quality parameters obtained using a dental volume tomography phantom. For statistical analysis, regression analysis using a generalized linear model was used.
Results: Polymethyl-methacrylate (PMMA) noise and modulation transfer function (MTF) 10% showed statistically significant correlations with DAP values, presenting positive and negative correlations, respectively (P<0.05). Image quality parameters other than PMMA noise and MTF 10% did not demonstrate statistically significant correlations with DAP values.
Conclusion: As radiation exposure and image quality are not proportionally related in clinically used equipment, it is necessary to evaluate and monitor radiation exposure and image quality separately.
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KEYWORD
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Radiation Exposure, Cone-Beam Computed Tomography, Diagnostic X-Ray, Quality Control
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