Explore tomographic image reconstruction algorithms using Julia in this JuliaCon2021 talk. Dive into large-scale ill-posed inverse problems and matrix-free methods for imaging operators. Learn about the Julia package ecosystem for two tomographic imaging methods, comparing advantages to C/C++ libraries. Discover MRIReco.jl and MPIReco.jl packages, and understand tomography principles, imaging equations, and reconstruction techniques. Examine design goals, existing and newly developed packages, and performance metrics. Gain insights into Magnetic Particle Imaging (MPI), online reconstruction, and dynamic image reconstruction. See demonstrations of graphical user interfaces and their applications in tomographic imaging.