PROVIDING A MASK IMAGE

The invention relates to providing a mask image. The invention relates to a method for providing a mask image, comprising: a) receiving medical image data having a temporal dimension, b) generating a frequency data set having data points, each having a frequency value, by applying a Fourier transform to the image data, the Fourier transform being applied at least along the temporal dimension, c) segmenting the frequency data set into two sub-regions on the basis of at least one frequency threshold, d) generating a mask image by applying an inverse Fourier transform to a first sub-region and/or a second sub-region of the frequency data set, and e) providing the mask image. The invention also relates to a method for providing a difference image, a providing unit, a medical imaging device and a computer program product. 本发明涉及提供掩模图像。本发明涉及一种用于提供掩模图像的方法，包括：a)接收具有时间维度的医学图像数据，b)通过将傅立叶变换应用于图像数据来产生具有数据点的频率数据组，数据点分别具有频率值，其中，至少沿着时间维度应用傅立叶变换，c)基于至少一个频率阈值将频率数据组分割为两个子区域，d)通过将逆傅立叶变换应用于频率数据组的第一子区域和/或第二子区域来产生掩模图像，e)提供掩模图像。本发明还