Stejskal-Tanner equation modified by Jerschow and Müller (link):
\( I(g) = exp \Bigg(-D\gamma ^{2}g^{2}\delta ^{2}\left(T + \dfrac{2}{3}\delta + \dfrac{3}{4}\tau \right)\Bigg) \)
Pulse sequence:
Stejskal-Tanner equation (link):
\( I(g) = exp\Bigg(-D\gamma ^{2}g^{2}\delta ^{2}\left(\Delta -\dfrac{\delta}{3}\right)\Bigg) \)