表面圧縮は人間の乳房の生体内のVisR硬度、粘度、および異方性測定に変化をもたらす
Anna V Phillips1, Cherie M Kuzmiak2, Doreen Steed2
1Lampe Joint Department of Biomedical Engineering, University of North Carolina at Chapel Hill, North Carolina State University, Chapel Hill, NC 27514 USA.
まとめ
表面圧縮は、乳房組織の粘弾性応答(VisR)超音波測定の硬度と粘度に大きな影響を与えます。特に高密度乳房では、VisR画像診断による乳がんの正確な診断には、圧縮の標準化が不可欠です。
科学分野:
- 生物医学超音波
- 医用画像処理
- 生物物理学
背景:
- 粘弾性応答(VisR)超音波は、組織の硬度と粘度を評価するための非侵襲的で低コストな画像技術です。
- VisRは、マンモグラフィーが効果の低い高密度乳房での検出を改善する可能性があり、乳がん診断に有望です。
- 予備研究では、VisRが硬度、粘度、および異方性に基づいて悪性および良性の乳房病変を区別できることが示されています。
研究 の 目的:
- 乳房組織のVisR測定に対する適用表面圧縮の影響を評価すること。
- 高密度および非高密度乳房の女性間での圧縮効果の違いを評価すること。
- ピーク変位(PD)、相対弾性(RE)、相対粘度(RV)、および異方性度(DoA)に対する圧縮の影響を決定すること。
主な方法:
- 異常のない20人の女性を対象としたIRB承認の臨床研究。
- 様々なレベルの表面圧縮下で、PD、RE、RV、およびDoAのVisR測定を実施しました。
- 参加者の乳房密度を分類し、20人中10人がマンモグラフィーで高密度乳房でした。
主要な成果:
- 表面圧縮は、生体内のPD、RE、およびRV測定に有意に影響を与えました。
- 硬度(PDおよびRE)は、特に高密度乳房の女性において、圧縮とともに有意に増加しました。
- DoAに対する圧縮の影響は様々でした(増加、減少、または不変)。乳房密度グループ間で有意な差はありませんでした。
結論:
- 適用表面圧縮は、乳房組織のVisR測定に影響を与える重要な要因です。
- 臨床VisR乳房画像診断、特に高密度乳房の女性においては、圧縮の標準化と監視が推奨されます。
- 繰り返し可能なVisR測定のための最適なひずみ範囲を確立するには、さらなる研究が必要です。
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