Fundamental Properties of Magnetization

In MR imaging the detected signal is proportional to the magnetization of an ensemble of spins (a spin isochromat). Thus, one can simply replace the magnetic moment with bulk magnetization in many equations such as the Bloch equations. The beauty is that the physics concepts behind energy, forces, and the equations of motion do not change, whether one considers a single spin or a set of spins. In this unit, the concept of bulk magnetization and quantized spin angular momentum are introduced. The dependence of the magnetization on spin density.