中文说明：应用背景一种兆伏级高能量的医用X-ray图像增强方法，图像为放疗过程的采集EPID图像，该方法对于其它类型图像增强也可借鉴。关键技术主要技术：将图像做傅立叶变换到频域，分别用带通滤波器、高通滤波器进行滤波，再用所得的滤波图像做加减乘除运算，所得的图像再做傅立叶反变换
English Description：
Application backgroundA megavoltage high energy X-ray medical image enhancement method, image for radiation acquisition EPID images, this method for other types of image enhancement can also be used for reference.Key TechnologyThe main technology: the image is Fourier transformed into the frequency domain, respectively with a band-pass filter, a high pass filter for filtering, arithmetic operations using the obtained image filtering, images obtained by Fourier inverse transform