How MRI Works - Part 4 - The Gradient Recalled Echo (GRE)

How MRI Works - Part 4 - The Gradient Recalled Echo (GRE) MRI Sequence Part 1 - NMR Basics: https://youtu.be/TQegSF4ZiIQ Part 2 - The Spin Echo: https://youtu.be/M7yh0To6Wbs Part 3 - Fourier Theory and k-Space: https://youtu.be/R_4GuyJTzMo Powerpoint slides from this lecture can be purchased here: https://www.patreon.com/thePIRL769/shop/powerpoint-slides-how-mri-works-part-4-62225?source=storefront 0:00 - Intro 1:07 - NMR Review 2:14 - Laboratory/Rotating Reference Frames 4:18 - The Gradient Echo 7:28 - GRE Overview 10:52 - Scanner: B0 Magnet 12:57 - Scanner: Gradient Coils 16:45 - Scanner: RF Coil 19:23 - Slice Selection 26:46 - The Signal Equation 29:17 - Frequency Encoding 32:56 - Phase Encoding 36:20 - k-Space and Gradients 44:19 - k-Space and Signal 48:30 - The Gradient Recalled Echo Sequence 52:06 - Phase vs Frequency Encoding 55:42 - Echo Planar Imaging 56:23 - GRE Exercise and Outro [1] https://mri-q.com/uploads/3/4/5/7/34572113/main_field_magnets_ismrm2006.pdf