自由呼吸冠状动脉造影中的心呼吸运动。
Respiratory motion of the heart from free breathing coronary angiograms.
作者信息
Shechter Guy, Ozturk Cengizhan, Resar Jon R, McVeigh Elliot R
机构信息
Laboratory of Cardiac Energetics, NHLBI, National Institutes of Health, DHHS, Bethesda, MD 20892, USA.
出版信息
IEEE Trans Med Imaging. 2004 Aug;23(8):1046-56. doi: 10.1109/TMI.2004.828676.
Respiratory motion compensation for cardiac imaging requires knowledge of the heart's motion and deformation during breathing. This paper presents a method for measuring the natural tidal respiratory motion of the heart from free breathing coronary angiograms. A three-dimensional (3-D) deformation field describing the cardiac and respiratory motion of the coronary arteries is recovered from a biplane acquisition. A cardiac respiratory parametric model is formulated and used to decompose the deformation field into cardiac and respiratory components. Angiograms from ten patients were analyzed. A 3-D translation motion model was sufficient for describing the motion of the heart in only two patients. For all patients, the heart translated caudally (mean, 4.9+/-1.9 mm; range, 2.4 to 8.0 mm) and underwent a cranio-dorsal rotation (mean, 1.5 degrees+/-0.9 degrees; range, 0.2 degrees to 3.5 degrees) during inspiration. In eight patients, the heart also translated anteriorly (mean, 1.3+/-1.8 mm; range, -0.4 to 5.1 mm) and rotated in a caudo-dextral direction (mean, 1.2 degrees+/-1.3 degrees; range, -1.9 degrees to 3.2 degrees).
心脏成像的呼吸运动补偿需要了解心脏在呼吸过程中的运动和变形情况。本文提出了一种从自由呼吸冠状动脉血管造影测量心脏自然潮式呼吸运动的方法。从双平面采集中恢复描述冠状动脉心脏和呼吸运动的三维（3-D）变形场。建立了心脏呼吸参数模型，并用于将变形场分解为心脏和呼吸分量。分析了10例患者的血管造影。仅在2例患者中，三维平移运动模型足以描述心脏的运动。对于所有患者，心脏在吸气过程中尾侧平移（平均4.9±1.9mm；范围2.4至8.0mm），并进行头背侧旋转（平均1.5°±0.9°；范围0.2°至3.5°）。在8例患者中，心脏还向前平移（平均1.3±1.8mm；范围-0.4至5.1mm），并向尾侧-右侧方向旋转（平均1.2°±1.3°；范围-1.9°至3.2°）。
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