術前計画における乳がん腫瘍局在化のための患者固有の粘弾性超弾性力学モデル
Felicia Alfano1,2, Pedro Navas3, Pablo Lamata4
1Biomedical Image Technologies Universidad Politécnica de Madrid Madrid Spain.
Bioengineering & translational medicine
|January 23, 2026
まとめ
本研究では、患者の体位変換による変形をシミュレーションするために、有限要素解析を用いた個別化された乳房生体力学モデルを開発しました。この新しい手法は、組織の変化を正確に予測し、乳がん手術のための腫瘍局在化を改善します。
科学分野:
- 生物医学工学
- 計算力学
- 医用画像処理
背景:
- 乳房手術時の体位はMRI撮像時と異なり、著しい乳房変形を引き起こします。
- 効果的な乳房温存手術のためには、正確な腫瘍局在化が不可欠です。
- 既存の乳房変形モデリング手法には限界があります。
研究 の 目的:
- 体位変化による変形をシミュレーションする、正確で患者固有の乳房生体力学モデルを開発すること。
- MRIデータと有限要素解析を統合することにより、腫瘍局在化精度を向上させること。
- 個々の乳房組織の機械的特性のモデリングにおける課題を克服すること。
主な方法:
- 有限要素解析(FEA)と機械的特性最適化を組み合わせて利用しました。
- 表面情報のみを使用して、個別化された乳房変形モデルを開発しました。
- 乳房組織の応力-ひずみ関係を定義するために、粘弾性超弾性モデルを採用しました。
主要な成果:
- この新しいアプローチは、15例の乳がん症例において、平均腫瘍局在化誤差8.12 ± 4.15 mmを達成しました。
- 乳房組織の大規模変形の正確かつ現実的なシミュレーションを実証しました。
- 腫瘍局在化誤差の削減において、既存の手法を上回りました。
結論:
- 提案された個別化された生体力学モデリングアプローチは、乳房変形のシミュレーションにおける課題を効果的に解決します。
- この手法は、乳がん患者の術前腫瘍局在化精度の顕著な向上をもたらします。
- この技術は、乳房温存手術における手術計画と予後の改善に有望です。
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