7. (15 pts) What are the longitudinal and transverse magnetization after an excitation pulse of 135 flip angle on the magnetization at equilibrium (Mo) as a function of t? (Hint: relaxation has to be considered.) When does the Mz reaches zero after excitation? When does MT becomes 0.1 Mo? Assume T1 = 1s, and T2 = 200 ms. 7. (15 pts) What are the longitudinal and transverse magnetization after an excitation pulse of 135 flip angle on the magnetization at equilibrium (Mo) as a function of t? (Hint: relaxation has to be considered.) When does the Mz reaches zero after excitation? When does MT becomes 0.1 Mo? Assume T1 = 1s, and T2 = 200 ms