磁気共鳴による心房隔膜欠陥の画像とサイズ測定
G Holmvang1, I F Palacios, G J Vlahakes
1Department of Radiology, Massachusetts General Hospital, Boston, USA.
Circulation
|December 15, 1995
まとめ
心房隔膜の欠陥 (ASD) の正確な非侵襲的なサイズ測定は,皮膚経閉のために非常に重要です. フェーズコントラストシネマMRIは,スピンエコーMRIとは異なり,ASDのサイズを正確に測定し,カテーテルベースの介入のための患者の選択を助けます.
科学分野:
- 心血管画像検査についてです.
- 医療診断 医療診断
- 介入性心臓病学 介入性心臓病学
背景:
- 心房隔膜の欠陥 (ASDs) に対する皮膚経膜閉塞技術は,最適な患者の選択のために,正確な非侵襲的なASDサイズの測定を必要とします.
- 正確な欠陥測定は,手術による修復と対比して,カテーテルベースの介入の適性を決定するために不可欠です.
研究 の 目的:
- 心房隔膜欠陥 (ASD) の大きさを非侵襲的に決定するための磁気共鳴 (MR) 画像技術の精度を評価する.
- ASDの次元を測定する際に,スピンエコーと相対照シネマMRI画像の有効性を比較する.
主な方法:
- 30人の患者でASDのスピン・エコーと相対照シネマ MR画像を取得しました.
- 両 MR テクニックを使用して ASD 大小径を測定し,欠陥面積を計算しました.
- カテーテリゼーション中の手術のテンプレートと気球のサイズ測定とMR測定を比較した.
主要な成果:
- ASDの大きさの相対照シネマ MR測定は,キャセテリゼーションおよびテンプレート標準 (主要な直径: y = 0.78x + 5.7, r = .93) と密接な一致を示しました.
- Spin-echo MR測定では,セクタムASDの主要な直径 (48%) と面積 (125%) を著しく過大評価した.
- 段階対照シネマMRは,シャントフロービジュアライゼーションを通じて,精密に定義された欠陥形状.
結論:
- フェーズコントラストシネマMRI画像はシャントフローを視覚化することで,患者の層分化のためにASDのサイズを正確に決定します.
- このテクニックは,手術と対比してカテーテルベースの閉塞のために患者を選択するための信頼性の高い非侵襲的評価を可能にします.
- スピンエコーMRI画像は,隣接する薄められた隔膜の潜在的含有により,ASDのサイズ測定には不十分です.
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