Diaphragm Tracking for Respiratory Motion Compensated Cardiac CArm CT
Diaphragm Tracking for Respiratory Motion Compensated Cardiac CArm CT
复制标题
用于呼吸运动补偿心脏 CArm CT 的隔膜跟踪
DOI：
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
R. Fahrig
中科院分区：
文献类型：
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作者：
Marco Bögel;A. Maier;H. Hofmann;J. Hornegger;R. Fahrig
几秒钟的长采集时间导致心脏C形臂CT中的图像伪影。虽然ECG门控能够选择特定的心脏相位，但残留伪影主要由呼吸运动引起。为了提高图像质量，重要的是准确地估计在图像采集期间发生的呼吸运动。已经表明，心脏运动与呼吸引起的心脏运动相关。提出了一种基于投影空间中横膈膜轮廓跟踪的运动估计和补偿方法。该方法利用2-D二次曲线模型来估计和跟踪具有亚像素精度的光阑。基于跟踪结果，我们使用运动校正三角算法来估计隔膜顶部的3-D运动。所得到的信号用于补偿重建期间的上下呼吸运动。
Long acquisition times of several seconds lead to image artifacts in cardiac C-arm CT. While ECG gating is able to select a certain heart phase, residual artifacts are mostly caused by respiratory motion. In order to improve image quality, it is important to accurately estimate the breathing motion that occurred during image acquisition. It has been shown that diaphragmmotion is correlated to the respiration-induced motion of the heart. We present a motion estimation and compensation method based on the tracking of the diaphragm contour in projection space. The approach utilizes a 2-D quadratic curve model to estimate and track the diaphragm with sub-pixel accuracy. Based on the tracking results, we use a motion corrected triangulation algorithm to estimate the 3-D motion of the diaphragm top. The resulting signal is used to compensate for superior-inferior respiratory motion during the reconstruction.
影响因子：
2.6
作者：
Marchant, T. E.;Price, G. J.;Moore, C. J.
通讯作者：
Moore, C. J.