Computational Fluid Dynamics Modeling in Aortic Diseases

コンピューター数値流体力学 (computational fluid dynamics : CFD)は,液体の流れや熱伝導な どに関連した様々な現象を,コンピューター上の 数値解析の手法にてシミュレーションする機械工 学分野の手法のひとつである。近年では,コン ピューターパワーの急速な発展に伴って様々な複 雑系の解析に用いられ,産業分野にも応用されて いる。CFDモデリングでは,流体の流れを偏微 分方程式をもって記載し,構造と流体の関係性に ついて解析する。医療画像とコンピューター数値 計算法という二つの分野の発展と相まって,近代 では,CFDの臨床医療への応用が急速に進んで いる。心臓血管領域は CFDの臨床応用が最も進 む分野である。 CFDは本来流体力学を専門とする数学者や工 学者によって行われるものであるが,これほどま でに CFDが臨床医療に用いられるようになった 現在,医療者にとっても単にそれを道具としてた だ使用するのみでは無く,基本的な概念,計算方 法の段階,手法が抱える問題点やピットフォール について熟知することが重要であり,CFDの臨 床応用による恩恵を最大限に享受することが可能 となる。 本稿では,大動脈瘤に対する CFDモデリング とその臨床応用についての概要をのべる。

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