What is a fast spin echo pulse sequence?
An FSE pulse sequence begins with a 90-degree RF pulse, followed by a series of 180-degree RF pulses, leading to formation of multiple spin echoes. Since multiple spin echoes are obtained at a time, fewer repetitions of the pulse sequences are required to create MR images, leading to faster image acquisition times. This pulse sequence is commonly used to obtain T2-weighted images and sometimes T1-weighted images.
