Artifact Reduction Method for Micro-CT Image in Mineralized Hard Tissue

DOI 9 References
  • SHIMODA Shinji
    Department of Oral Anatomy-1,Tsurumi University School of Dental Medicine
  • MORITA Yasuhiko
    Department of Oral Radiology,Tsurumi University School of Dental Medicine
  • HIGUCHI Shinichi
    Department of Oral Anatomy-1,Tsurumi University School of Dental Medicine
  • KOBAYASHI Kaoru
    Department of Oral Radiology,Tsurumi University School of Dental Medicine
  • KAWASAKI Kenzo
    Department of Oral Anatomy-1,Tsurumi University School of Dental Medicine

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  • 石灰化組織のマイクロCT画像におけるアーチファクト低減法

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Abstract

The aim of this study was to reduce artifacts in microcomputed tomography (micro-CT) images caused by the beam hardening effects of X-ray. The micro-CT images were corrected in comparison with a human extracted tooth embedded in compensating material, dental plaster (CaSO4・1/2H2O), which was placed in an aluminum cylindrical container and not embedded. As a result, the artifacts of the micro-CT images were reduced by the compensating materials. It is considered that this phenomenon occurred because the low-energy X-ray parts were absorbed by the compensating material which has a high attenuation coefficient. The development of this method eliminated the problems caused by beam hardening effects when measuring bone mineral density (BMD), such as surrounding newly formed bone in dental implants, and also suggested the possibility of using the new methods for BMD by using micro-CT images.

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