Imaging Science in Dentistry

Korean Academy of Oral and Maxillofacial Radiology (대한영상치의학회)
권호 표지
DOI QR코드

DOI QR Code

Reference line-pair values of panoramic radiographs using an arch-form phantom stand to assess clinical image quality

  • Choi, Da-Hye (Department of Oral and Maxillofacial Radiology and Dental Research Institute, School of Dentistry, Seoul National University) ;
  • Choi, Bo-Ram (Department of Oral and Maxillofacial Radiology and Dental Research Institute, School of Dentistry, Seoul National University) ;
  • Choi, Jin-Woo (Department of Oral and Maxillofacial Radiology, College of Dentistry, Dankook University) ;
  • Huh, Kyung-Hoe (Department of Oral and Maxillofacial Radiology and Dental Research Institute, School of Dentistry, Seoul National University) ;
  • Yi, Won-Jin (Department of Oral and Maxillofacial Radiology, BK21 Craniomaxillofacial Life Science, and Dental Research Institute, School of Dentistry, Seoul National University) ;
  • Heo, Min-Suk (Department of Oral and Maxillofacial Radiology and Dental Research Institute, School of Dentistry, Seoul National University) ;
  • Choi, Soon-Chul (Department of Oral and Maxillofacial Radiology and Dental Research Institute, School of Dentistry, Seoul National University) ;
  • Lee, Sam-Sun (Department of Oral and Maxillofacial Radiology, BK21 Craniomaxillofacial Life Science, and Dental Research Institute, School of Dentistry, Seoul National University)
  • Received : 2012.03.22
  • Accepted : 2012.05.02
  • Published : 2013.03.31
Download PDF
⟨ Previous Next ⟩

Abstract

Purpose: This study was performed to suggest reference line-pair values of panoramic images with clinically desirable qualities using an arch-form phantom stand. Materials and Methods: The line-pair test phantom was chosen. A real skull model was selected for setting the arch-form model of the phantom stand. The phantom stand had slits in four regions (incisor, premolar, molar, TMJ). Four raw images of the test phantom in each region and one raw image of the real skull were converted into 50 test phantom images and 50 skull phantom images with various line-pair values. 50 post-processed real skull phantom images were divided into 4 groups and were randomly submitted to 14 evaluators. Image quality was graded on a 4 point scale (1. good, 2. normal, 3. poor but interpretable, and 4. not interpretable). The reference line pair was determined as the first line-pair value scored less than 2 points. Result: The mean scores tended to decrease as the line-pair values increased. The reference line-pair values were 3.19 LP/mm in the incisor, 2.32 LP/mm in the premolar and TMJ, and 1.88 LP/mm in the molar region. Conclusion: Image quality evaluation methods and criteria should be able to assess various regions considering the characteristics of panoramic systems. This study suggested overall and regional reference line-pair values and established a set of standard values for them.

Keywords

References

  1. Yoo S, Kim GY, Hammoud R, Elder E, Pawlicki T, Guan H, et al. A quality assurance program for the on-board imagers. Med Phys 2006; 33 : 4431-47. https://doi.org/10.1118/1.2362872
  2. Enforcement regulations of the installation and operation of special medical equipments. Enforcement regulation No.65 of Ministry of Health and Welfare, 2003.
  3. Lee SH, Choe YH, Chung SY, Kim MH, Kim EK, Oh KK, et al. Establishment of quality assessment standard for mammographic equipments: evaluation of phantom and clinical images. J Korean Radiol Soc 2005; 53 : 117-27. https://doi.org/10.3348/jkrs.2005.53.2.117
  4. Korean Institute for Accreditation of Medical Imaging [internet]. Table for mammographic quality control. Available from: http:// www.ikiami.or.kr/Data/KMI501QD.aspx.
  5. Kin HJ, Lee HG, Jeong JB, Im CI, Son HK. A study on guidance for medical radiation safety. Final report. Seoul: Korea Food and Drug Administration; 2010. Report No.: 10171Radiology
  6. White SC, Pharoah MJ. Oral Radiology: principles and interpretation. 6th ed. St. Louis: Mosby-Year Book Inc; 2009.
  7. Gopal A, Samant SS. Use of a line-pair resolution phantom for comprehensive quality assurance of electronic portal imaging devices based on fundamental imaging metrics. Med Phys 2009; 36 : 2006-15. https://doi.org/10.1118/1.3099559
  8. Raberin M, Laumon B, Martin JL, Brunner F. Dimensions and form of dental arches in subjects with normal occlusions. Am J Orthod Dentofacial Orthod 1993; 104 : 67-72. https://doi.org/10.1016/0889-5406(93)70029-N
  9. DIN German Institute for Standardization. DIN 6868-151. Image quality assurance in diagnostic X-ray departments - Part 151: acceptance testing of dental radiographic equipment accordance to RoV - Rules for the inspection of image quality after installation, maintenance and modification. Berlin: DIN Deutsches Institut für Normung e. V.; 2010.

Cited by

  1. Development of panorama resolution phantom for comprehensive evaluation of the horizontal and vertical resolution of panoramic radiography vol.10, pp.1, 2013, https://doi.org/10.1038/s41598-020-73639-3
  2. Correlation between spatial resolution and ball distortion rate of panoramic radiography vol.20, pp.1, 2020, https://doi.org/10.1186/s12880-020-00472-5
  3. The Chairside Periodontal Diagnostic Toolkit: Past, Present, and Future vol.11, pp.6, 2013, https://doi.org/10.3390/diagnostics11060932
  4. QCBCT-NET for direct measurement of bone mineral density from quantitative cone-beam CT: a human skull phantom study vol.11, pp.1, 2013, https://doi.org/10.1038/s41598-021-94359-2