MRI image formation: Fourier transform | e-MRI

@pesu.lockin on Instagram: "Lock in so we don’t have to also drop a signals and systems diss track. This is the Z-Transform — how discrete-time systems are analyzed efficiently. The Z-transform converts a time-domain sequence into the Z-domain. This turns convolution in time into simple multiplication in Z. Poles and zeros describe the system’s mathematical behavior. But the function alone is not enough — the Region of Convergence matters. The ROC tells you where the transform actually exists. A