The simulator returns the same expected result as one would expect from a real clinical scanner.
We do this by simulating the MRI signal in each spin in every voxel of the slice volume of the patient model, we do this for every time step to compute the actual evolution of the MR-signal over time. We acquire the k-space and reconstruct the data into the image domain and MR-image.
This is why you get the same resulting output image as on a real scanner (given the same inputs being used), including anatomy, resolution, scan time, SNR, contrast and artifacts.
Our technology is built on more than 8 years of research on MRI simulations.