Question

How is the size of the mri signal related to the applied b0 field?

Answer 1

Answer:

Intensity Of MRI signal is related as square of $B_{0}$

or

Intensity is related as $B_{0}^{2}$.

Explanation:

MRI simply means Magnetic Resonance Imaging. In this process by the resonance of magnetic field the frequency is produced which is used to image the body parts (Mainly the brain).

The signal Strength is the rate of change of Magnetization (M) with respect to the time. For the calculation of Intensity we use Bloch equation which is given by

$\frac{dH}{dt} = M \times \gamma B$

On further solving

$\frac{dH}{dt} =\mu B \times \gamma B \\\frac{dH}{dt} = \mu \times \gamma B^{2}$

So, Intensity is related as $B_{0}^{2}$.