SVD-Based Evaluation of Multiplexing in Multipinhole SPECT Systems

Figure 1

Block diagram of projection-backprojection operation. Noise is introduced at the projection operation, 𝐁. Image components which are “attenuated” in 𝐁 and 𝐁^𝑇 must be “amplified” in 𝐀^†, increasing the noise in 𝐱^′.