Consider a 2-D object consisting of two triangle compartments, as shown in Figure P9.4. Suppose a solution containing a 511 KeV gamma ray emitting radionuclide with concentration f = 0.5….
Calculate MZ(0−), the steady-state magnetization value just before the RF pulses.
In this problem, we answer the question: What is the tip angle that maximizes MR signal intensity for a pulse sequence with given TR and TE values? Solve this problem for given T1, T2, and T∗ 2 values. Assume that the magnetization is in the steady-state condition, that is, the magnetization is a periodic function of time with a period of TR. Also assume that the transverse magnetization completely dephases before each RF pulse, that is, Mxy(0−) = 0.
(a) Calculate MZ(0−), the steady-state magnetization value just before the RF pulses.
(b) Calculate Mxy(TE), the signal level in the steady-state condition.
(c) Calculate the optimum tip angle.