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
Reconstruction in CT and hints to the assignments CT reconstruction repetition & hints Modern CT system generations Measure
MATLAB How to implement a Ram-Lak filter (Ramp filter) in the frequency domain? - Stack Overflow
Biosignal and Biomedical Image Processing MATLAB based Applications - John L. Semmlow - Стр 17
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