Open Educational Resources | Pao Yue-kong Library, The Hong Kong Polytechnic University

How MRI Works: Part 1 - NMR Basics.

First in a series on how MRI works. This video deals with NMR basis such as spin, precession, T1 and T2, TR and TE, and Boltzmann Magnetization.

0:00 - Introduction

1:22 - Nuclear Magnetic Resonance

4:10 - Inside the MRI Scanner

7:50 - The Proton, Spin, and Precession

11:34 - Signal Detection and the Larmor Equation

14:10 - Flip Angle

15:30 - Ensemble Magnetic Moment

16:34 - Free Induction Decay and T2

18:43 - T2 Weighting and TE

21:46 - Spin Density Imaging

24:18 - T1 Relaxation

25:45 - T1 Weighting and TR

27:01 - The NMR Experiment and Rotating Frame

28:57 - Excitation: the B1 field

30:14 - Measuring Longitudinal Magnetization

31:34 - The MR Contrast Equation

34:42 - Boltzmann Magnetization and Polarization

40:09 - Hyperpolarization

41:42 - Outro

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