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首页> 外文会议>Conference on Physiology and Function: Methods, Systems, and Applications Feb 16-18, 2003 San Diego, California, USA >Manual and Semi-automatic Registration vs Retrospective ECG Gating for Correction of Cardiac Motion
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Manual and Semi-automatic Registration vs Retrospective ECG Gating for Correction of Cardiac Motion

机译：手动和半自动配准与回顾性ECG门控以纠正心脏运动

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摘要

A manual and a semi-automatic image registration method were compared with retrospective ECG (rECG) gating to correct for cardiac motion in myocardial perfusion (MBF) measurement. 5 beagles were used in 11 experiments. For each experiment a 30 s cine CT scan of the heart was acquired after contrast injection. For the manual method, a reference end-diastole (ED) image was selected from the first cardiac cycle. ED images in subsequent cardiac cycles were manually selected to match the shape of the reference ED image. For each cardiac cycle in the semi-automatic method, the image with the maximum area and the most similar shape to the selected image of the previous cardiac cycle was chosen as ED image. MBFs were calculated from the images registered by the three methods and compared. The averages of the difference of MBF_(manual) and MBF_(semi-auto) and MBF_(rECG) in the lateral free wall of LV were 3.6 and 3.4 ml/min/100g respectively. The corresponding standard deviations from the mean were 9.1 and 28.3 ml/min/100g respectively. We concluded from these preliminary results that image registration methods were better than rECG gating for correcting heart, which should facilitate more precise measurement of MBF.
机译：将手动和半自动图像配准方法与回顾性ECG（rECG）门控进行了比较，以校正心肌灌注（MBF）测量中的心脏运动。在11个实验中使用了5只小猎犬。对于每个实验，在对比剂注射后获取心脏的30秒电影CT扫描。对于手动方法，从第一个心动周期中选择参考舒张末期（ED）图像。手动选择后续心动周期中的ED图像以匹配参考ED图像的形状。对于半自动方法中的每个心动周期，将具有与先前心动周期的选定图像最大面积和最相似形状的图像选为ED图像。由三种方法配准的图像计算MBF并进行比较。 LV外侧自由壁中MBF_（手动）和MBF_（半自动）和MBF_（rECG）之差的平均值分别为3.6和3.4 ml / min / 100g。与平均值相对应的标准偏差分别为9.1和28.3 ml / min / 100g。我们从这些初步结果得出结论，在校正心脏方面，图像配准方法优于rECG门控，这应有助于更精确地测量MBF。

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