The invention relates to a method of classification review the chest or abdominal breathing phase based on CT images, the method comprises the following steps: measuring the preset respiratory cycle, parameter setting of CT scanning; film mode CT scanned images, and to give each picture number, number and phase bed layer number for each picture; threshold segmentation, human body contour is obtained; the pixels of human body contour height contour matrix is set up for each phase; the elements of each phase in the matrix cumulative height values in each bed to pick accumulation and maximum value of a group of pictures corresponding to the array as a picture of a complete cycle in either; the bed for reference beds, three smooth spline curve fitting of each column two phase matrix, then calculate the two phase between adjacent horizon contour height difference A classification matrix was constructed by dividing the distance and the distance between the extraction and the smallest number of pictures; the classification matrix with the least difference in the respiratory cycle was selected as a retrospective classification result.
【技术实现步骤摘要】
【技术保护点】
一种基于呼吸相位的胸部或腹部CT图像的回顾性分类方法,该方法由以下步骤组成:(1)首先对需要进行CT扫描的对象进行呼吸周期的时长标定,以对象的平均呼吸周期为预设呼吸周期,然后根据CT扫描器的转速,设定一个床位CT扫描器转动的转数,使一个床位中探测器所得到的CT图片张数大于探测器在一个预设呼吸周期内获得的CT图片张数,小于探测器在两个预设呼吸周期内获得的CT图片张数;(2)启动CT扫描器对人体的胸部或腹部进行电影模式CT扫描,并将所获得的每一张CT图片按人体进入扫描区的先后顺序给CT图像的每一图片赋予床位号和层位号,按扫描成像的时间顺序给CT图像的每一图片赋予相位号;(3)将CT图像的每一图片进行阈值分割并获取人体体表轮廓曲线;(4)以通过人体轮廓曲线在垂直方向的最低点的水平线为基准,对每一图片自左向右依次竖向逐点扫描,当图片的一列像素点的像素值全为零时记为零,当图片的一列由上而下有一个像素点的像素值不为零时,便记下第一个像素值不为零的像素点的高度值;然后将所记录的数据按自左向右的顺序排列,再以所得到的排列为行,按床位层位号的顺序由上向下排列,得到每一个床位的轮廓矩阵;(5)将每一矩阵中 ...
【技术特征摘要】
【专利技术属性】
技术研发人员:周凌宏,徐圆,卢文婷,刘迎军,甄鑫,
申请(专利权)人:南方医科大学,
类型:发明
国别省市:81
还没有人留言评论。发表了对其他浏览者有用的留言会获得科技券。