Imaging Science in Dentistry

  • 제44권4호
  • /
  • Pages.279-285
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  • 2014
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  • 2233-7822(pISSN)
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  • 2233-7830(eISSN)
대한영상치의학회 (Korean Academy of Oral and Maxillofacial Radiology)
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Assessment of CT numbers in limited and medium field-of-view scans taken using Accuitomo 170 and Veraviewepocs 3De cone-beam computed tomography scanners

  • Oliveira, Matheus L. (Department of Oral Diagnosis, Piracicaba Dental School, State University of Campinas) ;
  • Tosoni, Guilherme M. (Department of Oral Diagnosis and Surgery, Araraquara Dental School, Sao Paulo State University) ;
  • Lindsey, David H. (Section of Oral and Maxillofacial Radiology, School of Dentistry, University of California) ;
  • Mendoza, Kristopher (Section of Oral and Maxillofacial Radiology, School of Dentistry, University of California) ;
  • Tetradis, Sotirios (Section of Oral and Maxillofacial Radiology, School of Dentistry, University of California) ;
  • Mallya, Sanjay M. (Section of Oral and Maxillofacial Radiology, School of Dentistry, University of California)
  • 투고 : 2014.05.03
  • 심사 : 2014.09.13
  • 발행 : 2014.12.31
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초록

Purpose: To assess the influence of anatomic location on the relationship between computed tomography (CT) number and X-ray attenuation in limited and medium field-of-view (FOV) scans. Materials and Methods: Tubes containing solutions with different concentrations of $K_2HPO_4$ were placed in the tooth sockets of a human head phantom. Cone-beam computed tomography (CBCT) scans were acquired, and CT numbers of the $K_2HPO_4$ solutions were measured. The relationship between CT number and $K_2HPO_4$ concentration was examined by linear regression analyses. Then, the variation in CT number according to anatomic location was examined. Results: The relationship between $K_2HPO_4$ concentration and CT number was strongly linear. The slopes of the linear regressions for the limited FOVs were almost 2-fold lower than those for the medium FOVs. The absolute CT number differed between imaging protocols and anatomic locations. Conclusion: There is a strong linear relationship between X-ray attenuation and CT number. The specific imaging protocol and anatomic location of the object strongly influence this relationship.

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참고문헌

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