Imaging Science in Dentistry

Korean Academy of Oral and Maxillofacial Radiology (대한영상치의학회)
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A pilot study of half-value layer measurements using a semiconductor dosimeter for intraoral radiography

  • Shun Nouchi (Department of Radiology, The Nippon Dental University Niigata Hospital) ;
  • Hidenori Yoshida (Department of Radiological Technology, Niigata University of Health and Welfare) ;
  • Yusaku Miki (Department of Radiology, The Nippon Dental University Niigata Hospital) ;
  • Yasuhito Tezuka (Department of Oral and Maxillofacial Radiology, The Nippon Dental University School of Life Dentistry at Niigata) ;
  • Ruri Ogawa (Department of Oral and Maxillofacial Radiology, The Nippon Dental University School of Life Dentistry at Niigata) ;
  • Ichiro Ogura (Department of Radiology, The Nippon Dental University Niigata Hospital)
  • Received : 2023.02.14
  • Accepted : 2023.05.12
  • Published : 2023.09.30
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Abstract

Purpose: This pilot study was conducted to evaluate half-value layer (HVL) measurements obtained using a semiconductor dosimeter for intraoral radiography. Materials and Methods: This study included 8 aluminum plates, 4 of which were low-purity (less than 99.9%) and 4 high-purity (greater than 99.9%). Intraoral radiography was performed using an intraoral X-ray unit in accordance with the dental protocol at the authors' affiliated hospital: tube voltage, 60 kVp and 70 kVp; tube current, 7 mA; and exposure time, 0.10 s. The accuracy of HVL measurements for intraoral radiography was assessed using a semiconductor dosimeter. A simple regression analysis was performed to compare the aluminum plate thickness and HVL in relation to the tube voltage (60 kVp and 70 kVp) and aluminum purity (low and high). Results: For the low-purity aluminum plates, the HVL at 60 kVp (Y) and 70 kVp (Y) was significantly correlated with the thickness of the aluminum plate (X), with Y=1.708+0.415X (r=0.999, P<0.05) and Y=1.980+0.484X (r=0.999, P<0.05), respectively. Similarly, for the high-purity aluminum plates, the HVL at 60 kVp (Y) and 70 kVp (Y) was significantly correlated with the plate thickness(X), with Y=1.696+0.454X (r=0.999, P<0.05) and Y=1.968+0.515X (r=0.998, P<0.05), respectively. Conclusion: This pilot study examined the relationship between aluminum plate thickness and HVL measurements using a semiconductor dosimeter for intraoral radiography. Semiconductor dosimeters may prove useful in HVL measurement for purposes such as quality assurance in dental X-ray imaging.

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References

  1. Fukuda A, Ichikawa N, Tashiro M, Yamao T, Murakami K, Kubo H. Measurement of the half-value layer for CT systems in a single-rotation technique: reduction of stray radiation with lead apertures. Phys Med 2020; 76: 221-6. https://doi.org/10.1016/j.ejmp.2020.07.004
  2. Lin PP, Goode AR. Accuracy of HVL measurements utilizing solid state detectors for radiography and fluoroscopy X-ray systems. J Appl Clin Med Phys 2021; 22: 339-44. https://doi.org/10.1002/acm2.13389
  3. Barrineau AB, Mah P, Mallya SM. Improvements in image quality after optimization in digital intraoral radiographs. J Am Dent Assoc 2023; 154: 24-31. https://doi.org/10.1016/j.adaj.2022.09.008
  4. Khan A, Javed MQ, Iqbal R, Khan F, Habib SR. Quality assurance audit of intra-oral periapical radiographs at the undergraduate dental school. J Ayub Med Coll Abbottabad 2020; 32: 327-30.
  5. Shibuya H, Nishikawa K, Kuroyanagi K. Effect of K-shell absorption edge filters on image quality in digital intraoral radiography. Oral Surg Oral Med Oral Pathol Oral Radiol Endod 2000; 90: 377-84. https://doi.org/10.1067/moe.2000.107532
  6. Katoh T, Sasaki T, Iwai K, Okano T, Satoh K, Shimano T, et al. A method for evaluating the entrance surface dose from the measurement of exposure and half value layer in intraoral radiography using a radiophotoluminescent dosemeter. Radiat Prot Dosimetry 2003; 103: 47-55. https://doi.org/10.1093/oxfordjournals.rpd.a006114
  7. Vassileva J, Stoyanov D. Quality control and patient dosimetry in dental cone beam CT. Radiat Prot Dosimetry 2010; 139: 310-2. https://doi.org/10.1093/rpd/ncq011
  8. Stratis A, Zhang G, Lopez-Rendon X, Jacobs R, Bogaerts R, Bosmans H. Customisation of a Monte Carlo dosimetry tool for dental cone-beam CT systems. Radiat Prot Dosimetry 2016; 169: 378-85. https://doi.org/10.1093/rpd/ncw024
  9. Wunderle KA, Godley AR, Shen ZL, Rakowski JT, Dong FF. Percent depth doses and X-ray beam characterizations of a fluoroscopic system incorporating copper filtration. Med Phys 2017; 44: 1275-86. https://doi.org/10.1002/mp.12109
  10. Matsubara K, Nagata H, Okubo R, Takata T, Kobayashi M. Method for determining the half-value layer in computed tomography scans using a real-time dosimeter: application to dual-source dual-energy acquisition. Phys Med 2017; 44: 227-31. https://doi.org/10.1016/j.ejmp.2017.10.020