Slice-Selection - Video Lesson

Hey, everybody. Welcome to today's lesson on spatial encoding in MRI. This lesson focuses on slice selection, specifically how it works and when it occurs during different pulse sequences. This information is important to understand as it lets us know both how the MRI scanner receives signal from specific locations in the body and how the MRI system knows where the signal is coming from. Remember, spatial encoding in MRI is how we map the location of signals within the body to create a detailed image. Spatial encoding is performed by the gradient coils in the MRI scanner, which superimpose external magnetic fields on b sub zero, creating what is called a gradient magnetic field. Spatial encoding involves slice selection, frequency encoding, and phase encoding. Let's take a closer look at the process of slice selection. Slice selection allows us to target a specific region or slice of the body to be imaged.