Balanced Gradient-Echo - Video Lesson

Hey, everybody. Welcome to today's lesson on pulse sequences. This lesson focuses on balanced gradient echo pulse sequences. We will discuss the mechanism, advantages, disadvantages, and suggested parameters of balanced gradient echo sequences so you understand when to use this particular pulse sequence. Let's get started. Balanced gradient echo is a modification of the coherent gradient echo pulse sequence that utilizes a fully balanced gradient system. In other words, during a balanced gradient echo sequence, the gradients of all three axes are applied symmetrically. If we apply the phase encoding gradient negatively, we will have to apply the phase encoding gradient positively as well. This symmetrical application of all the gradients corrects for errors caused by flowing blood and cerebrospinal fluid or CSF. How? Let's find out. Because flowing blood and CSF molecules are in motion flowing through the veins, their hydrogen nuclei