COPD診断のための気管支壁厚測定の精度評価に関する検討  [in Japanese] Evaluation for accuracy of bronchial wall measurement for COPD diagnosis  [in Japanese]

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Author(s)

Abstract

CT(Computed Tomography)画像を用いたCOPD(Chronic Obstructive Pulmonary Disease)の診断において,気管支壁厚の測定は重要な役割を果たす.気管支優位型COPDは気管支径が拡大,肥厚する疾患であり,その診断における気管支径の計測は各CTスライスに対して医師が目視で行うしかない.しかし,正確な診断のためには気管支に対して垂直な断面が必要であり,3次元的に画像上で径を計測することが望ましい.また,作業の効率化のためには気管支径の自動計測を行うコンピュータ支援診断(CAD:Computer Aided Diagnosis)システムの開発が求められている.そこで,本稿では,気管支に対して直交する平面を算出することで気管支壁厚を計測し,それを基に視覚的に病変部がわかるマッピング画像の作成を試みた.バーチャルファントムと実際の臨床CT画像を用いて実験を行い,手法の精度を検討した.

Evaluating airway wall is an important factor for diagnosis of COPD (Chronic Obstructive Pulmonary Disease) by use of CT (Computed Tomography) images. Chronic Bronchitis is a disease that changes airway wall thickness. Evaluation of airway wall is carried out by a doctor manually by use of two dimensional CT slice images. However, we consider that the three dimensional evaluation of airway wall thickness is more effective, and vertical section of airway wall is helpful for accurate COPD diagnosis. And the CAD (Computer Aided Diagnosis) system which is able to evaluate airway wall thickness automatically is needed. In this study, we tried to make mapping images for examination of pathological changes by using bronchial images. In order to make mapping images, this algorithm evaluates airway wall thickness by computing a vertical section. We evaluated the algorithm with virtual phantom and clinical CT images, and examined precision of the method.

Journal

  • IEICE technical report.

    IEICE technical report. 112(271), 7-10, 2012-10-22

    The Institute of Electronics, Information and Communication Engineers

References:  6

Codes

  • NII Article ID (NAID)
    110009636788
  • NII NACSIS-CAT ID (NCID)
    AA11370335
  • Text Lang
    JPN
  • Article Type
    ART
  • ISSN
    0913-5685
  • NDL Article ID
    024078951
  • NDL Call No.
    Z16-940
  • Data Source
    CJP  NDL  NII-ELS 
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