B = magnetic field strength

NMR = Nuclear Magnetic Resonance

MRI = Magnetic Resonance Imaging

g = gyromagnetic ratio

n = frequency

M_o = net magnetization at equilibrium

M_z = net magnetization not at equilibrium

M_xy =transverse magnetization

t = time

T₁ = spin-lattice relaxation time

T₂ = spin-spin relaxation time

Thk = slice thickness

G_i = slice selection gradient

D_n = change in frequency

t_w = amount of time the magnetic field is on for

q = 90 degrees

p =3.14159...

pixel = picture element

FOV = Field Of View

OR = Optical Resolution

f_s = sampling frequency

T₂^* = the combined time constant