This script allows users to explore the relationship between spatial frequencies and image reconstruction through interactive manipulation of an image's k-space. Using a 2D Fourier Transform, the script converts an image to its frequency domain, applies a customizable circular mask, and then reconstructs the image with an inverse transform. The user can adjust the mask's radius and inversion to visualize the effects on both k-space and the reconstructed image, providing insights into the role of different frequency components.