スパイラルCTを用いた顎関節の三次元評価法  [in Japanese] Three-dimensional Evaluation of Temporomandibular Joint Using Spiral CT  [in Japanese]

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Author(s)

    • 細木 真紀 HOSOKI Maki
    • 徳島大学大学院ヘルスバイオサイエンス研究部咬合管理学分野 Department of Fixed Prosthodontics, Institute of Health Biosciences, The University of Tokushima Graduate School
    • 薩摩 登誉子 SATSUMA Toyoko
    • 徳島大学大学院ヘルスバイオサイエンス研究部咬合管理学分野 Department of Fixed Prosthodontics, Institute of Health Biosciences, The University of Tokushima Graduate School
    • 高橋 章 TAKAHASHI Akira
    • 徳島大学医学部・歯学部附属病院歯科 Department of General Dentistry, University Medical and Dental Hospital, The University of Tokushima
    • 西川 啓介 NISHIGAWA Keisuke
    • 徳島大学医学部・歯学部附属病院歯科 Department of General Dentistry, University Medical and Dental Hospital, The University of Tokushima
    • 細木 秀彦 HOSOKI Hidehiko
    • 徳島大学医学部・歯学部附属病院歯科 Department of General Dentistry, University Medical and Dental Hospital, The University of Tokushima
    • 中野 雅徳 NAKANO Masanori
    • 徳島大学大学院ヘルスバイオサイエンス研究部咬合管理学分野 Department of Fixed Prosthodontics, Institute of Health Biosciences, The University of Tokushima Graduate School
    • 坂東 永一 BANDO Eiichi
    • 徳島大学大学院ヘルスバイオサイエンス研究部咬合管理学分野 Department of Fixed Prosthodontics, Institute of Health Biosciences, The University of Tokushima Graduate School
    • 竹内 久裕 TAKEUCHI Hisahiro
    • 徳島大学医学部・歯学部附属病院歯科 Department of General Dentistry, University Medical and Dental Hospital, The University of Tokushima
    • 菅原 千恵子 SUGAWARA Chieko
    • 徳島大学大学院ヘルスバイオサイエンス研究部口腔顎顔面放射線医学分野 Department of Oral and Maxillofacial Dentistry, Institute of Health Biosciences, The University of Tokushima Graduate School
    • 岩崎 裕一 IWASAKI Hirokazu
    • 徳島大学大学院ヘルスバイオサイエンス研究部口腔顎顔面放射線医学分野 Department of Oral and Maxillofacial Dentistry, Institute of Health Biosciences, The University of Tokushima Graduate School

Abstract

Three-dimensional (3-D) image reconstructed from Computed Tomography (CT) data is an ef>cient method to evaluate temporomandibular joint (TMJ) morphologically. Even the 3-D image reconstructed from spiral CT data has some distortion, typically along to the table feed direction, very few studies were reported about accuracy of reconstructed 3-D image size. The purpose of this research was to evaluate the distortion on 3-D image reconstructed with spiral CT (Somatom Plas4, Siemens Co, Germany) quantitatively. We used three imaging targets, eight ceramic balls placed at corners of cubic frame, a calibration cube that has the CT value nearly equal to cortex bone of human dried mandibular head. We evaluated relation between a threshold level of CT image processing and reconstructed 3-D image size with a custom-made computer program. CT data of ceramic balls clari>ed changes of the reconstructed image, -0.215mm for table feed direction and less than ±0.006mm for the other directions. The calibration cube was used for the arrangement of optimal scanning condition (reconstruction mode, collimation, reconstitution interval) and evaluation of reconstructed image size. The distortion of the image was +0.207mm for table feed direction and less than +0.029mm for the other directions. Changes of dried skull TMJ image reconstructed with the optimal scanning condition were -1.463mm for lateral direction of the condylar head, -0.956mm for back and forth direction and -0.580mm for table feed direction. Results of this research suggested that the level of the 3-D image distortion was mostly affected with the scanning condition. And the size of 3-D image was susceptible to the threshold level of CT image processing. Consequently, we think that the standardization of scanning condition should be concerned for the quantitative evaluation of 3-D TMJ image using CT data.

Journal

  • Shikoku dental research

    Shikoku dental research 19(2), 231-238, 2007-01

    The University of Tokushima

Codes

  • NII Article ID (NAID)
    110006560988
  • NII NACSIS-CAT ID (NCID)
    AN10050046
  • Text Lang
    JPN
  • Article Type
    departmental bulletin paper
  • ISSN
    0914-6091
  • Data Source
    NII-ELS  IR 
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