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首页> 外文会议>Conference on Biomedical Applications in Molecular, Structural, and Functional Imaging >Computerized method to compensate for breathing body motion in dynamic chest radiographs
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Computerized method to compensate for breathing body motion in dynamic chest radiographs

机译：用于补偿动态胸部射线照片中呼吸体运动的计算机化方法

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Dynamic chest radiography combined with computer analysis allows quantitative analyses on pulmonary function and rib motion. The accuracy of kinematic analysis is directly linked to diagnostic accuracy, and thus body motion compensation is a major concern. Our purpose in this study was to develop a computerized method to reduce a breathing body motion in dynamic chest radiographs. Dynamic chest radiographs of 56 patients were obtained using a dynamic flat-panel detector. The images were divided into a 1 cm-square and the squares on body counter were used to detect the body motion. Velocity vector was measured using cross-correlation method on the body counter and the body motion was then determined on the basis of the summation of motion vector. The body motion was then compensated by shifting the images based on the measured vector. By using our method, the body motion was accurately detected by the order of a few pixels in clinical cases, mean 82.5% in right and left directions. In addition, our method detected slight body motion which was not able to be identified by human observations. We confirmed our method effectively worked in kinetic analysis of rib motion. The present method would be useful for the reduction of a breathing body motion in dynamic chest radiography.
机译：动态胸部放射线照相与计算机分析相结合，允许定量分析肺功能和肋转运动。运动学分析的准确性与诊断准确性直接相关，因此身体运动补偿是一个主要问题。我们在本研究中的目的是开发一种计算机化方法，以减少动态胸部射线照片中的呼吸体运动。使用动态平板探测器获得56名患者的动态胸部射线照片。将图像分成1cm-正方形，并且使用体计量器上的正方形来检测身体运动。使用在体柜台上的互相关方法测量速度矢量，然后基于运动矢量的总和确定车身运动。然后通过基于测量的向量移动图像来补偿体运动。通过使用我们的方法，在临床病例中的几个像素的顺序精确地检测到身体运动，左右方向为82.5％。此外，我们的方法检测到轻微的身体运动，这不能通过人类观察来识别。我们确认了我们的方法在肋骨运动的动力学分析中有效地工作。本方法可用于减少动态胸部射线照相中的呼吸体运动。

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