Constant Gradient

• If gradient is constant as a fcn of time $G_{z}(t) = G_{0}$ then time integral gives
  

  $$k = \gamma \!\!\!\!\!-G t$$ (9.13)

  
  

• Just take the Fourier transform of $s(t)$ and will get $\rho(x)$ upto to a distance scaling factor with no extra manipulation at all. (IN-CLASS QUESTION)

• This is what makes MRI go around.