Orientation correction for chest images.
Orientation correction for chest images.
复制标题
胸部图像的方向校正。
DOI：
10.1007/bf03167768
复制
发表时间：
1992
影响因子：
4.4
通讯作者：
Huang,HK
中科院分区：
文献类型：
--
作者：
Pietka,E;Huang,HK
本报告介绍了一种自动程序，该程序确定计算机x线摄影（CR）胸部图像的方向，并将其旋转到放射科医生查看的标准位置。作为输入，使用归一化大小为1000 × 1000或2000 × 2000像素的CR图像。分析分三个步骤进行。首先，确定图像中脊柱的方向。然后，一个函数搜索上肢和横隔膜。最后，取出肺并比较其面积。这表示图像是否需要y轴翻转。这三个步骤设置了三个参数的值，并以此为基础确定了最终的旋转角度。该手术已在加州大学洛杉矶分校的诊所实施。正确旋转的图像率为95.4%。
This report presents an automatic procedure that determines the orientation of computed radiography (CR) chest images and rotates them to a standard position to be viewed by radiologists. As an input, CR images of a normalized size of 1,000 × 1,000 or 2,000 × 2,000 pixels are used. The analysis is performed in three steps. First, the orientation of the spine within the image is determined. Then, a function searches for upper extremities and the subdiaphragm. Finally, the lungs are extracted and their areas are compared. This indicates whether the image needs to be y-axis flipped. These three steps set the value of three parameters on the basis of which the final rotation angle is determined. The procedure has been implemented in the clinics at UCLA. The rate of correctly rotated images is 95.4%.