Choose the correct option from ae and explain why this is yo

Choose the correct option from (a)-(e) and explain why this is your choice.
The maximum MR signal is obtained by using:
(a) 90(degrees) RF pulse, short TE, and short TR
(b) 45(degrees) RF pulse, short TE, and short TR
(c) 90(degrees) RF pulse, short TE, and long TR
(d) 90(degrees) RF pulse, long TE, and short TR
(e) 45(degrees) RF pulse, long TE, and short TR

Solution

option c. Maximum signal strength is obtained by using a 90 degree pulse to maximize the magnetization in the transverse plane, starting with the maximum longitudinal magnetization (i.e., long TR) and minimizing dephasing (i.e .. short TE).