Figure 2.9 from Improved compressed sensing algorithm for sparse-view CT | Semantic Scholar
Figure 8.13, The responses in frequency domain (top row) as well as the discretized spatial domain kernels (bottom row) of the Ram-Lak and Shepp-Logan filters - Medical Imaging Systems - NCBI Bookshelf
The Use of Filtered Back projection Algorithm for Reconstruction of tomographic Image
Frequency response of `iradon()` filters differs greatly from the same filters in MATLAB · Issue #2853 · scikit-image/scikit-image · GitHub