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JP2011120668A Method for optimizing condition for observing local area of digital medical radiation image 审中-公开
标题翻译：用于观察数字医疗辐射图像局部区域优化条件的方法
公开(公告)号：JP2011120668A
公开(公告)日：2011-06-23
申请号：JP2009279141
申请日：2009-12-09
申请人： Hiroshi Kitani , 浩木谷
发明人： KITANI HIROSHI
IPC分类号： A61B6/00 , A61B5/00 , A61B5/055
摘要： PROBLEM TO BE SOLVED: To provide a method for observing a medical radiation image, wherein a computer automatically calculates the window level and the width optimal for an observation area only by a simple operation of a single click on a point within the area, when observing a data area larger or smaller than the displayed window level/width range in the observation of the medical rediation image.
SOLUTION: A histogram is generated using smoothed data, and is subjected to weighting treatment with distance elements and is smoothed. The window level is determined by (an average of density of a local area plus the density of a clicked point) divided by 2. Because the histogram of the local area becomes more discontinuous when a pixel value of the clicked point is especially high or low within the area, the histogram is corrected by means of a feature value of mean square of difference. The correction is also carried out by means of standard deviation of a Poisson distribution. When the local area is located at a border between two areas whose data averages differ greatly, the window width is determined by adding a value that is twice as much as standard deviation of a Gaussian distribution to a difference between the maximum value and the minimum value near the clicked point. By doing so, the window level/width optimal for the local area is calculated without complicated operations.
COPYRIGHT: (C)2011,JPO&INPIT
摘要翻译：要解决的问题：提供一种用于观察医疗放射图像的方法，其中计算机仅通过在该区域内的点上的单个点击的简单操作自动计算观察区域的最佳视窗水平和宽度在观察医疗重放图像时观察比显示的窗口水平/宽度范围大或小的数据区域。
解决方案：使用平滑数据生成直方图，并使用距离元素进行加权处理，并进行平滑处理。窗口级别由（区域密度的平均值加上点击的密度的平均值）除以2确定。因为点击点的像素值特别高或低时局部区域的直方图变得更不连续在该区域内，利用均方差的特征值校正直方图。校正也通过泊松分布的标准偏差进行。当局部区域位于其数据平均值差异很大的两个区域之间的边界时，通过将高斯分布的标准偏差的两倍的值与最大值和最小值之间的差值相加来确定窗口宽度靠近点击点。通过这样做，在没有复杂操作的情况下计算局部区域最佳的窗口级别/宽度。版权所有（C）2011，JPO＆INPIT

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