Medical Biophysics 3505F Lecture Notes - Lecture 2: Gyromagnetic Ratio, Angular Frequency, Exponential Decay

• School: Western University
• Department: Medical Biophysics
• Course: Medical Biophysics 3505F
• Professor: Niel Gelman

Document Summary

This slide introduces an important quantity known as the nuclear magnetization (m). It is a vector quantity as indicated by the underlining. The word nuclear here indicates that this magnetization comes from the magnetic moments of the nuclei. (electrons can also produce a magnetization. ) In the context of nmr, m usually refers specifically to the nuclear magnetization from the nuclear species that we are detecting (e. g. 1h for 1h mrs studies). This magnetization is simply the vector sum of all the nuclear magnetic moments (for species of interest) in a unit volume (e. g. , cubic centimeter). In other words, the absolute value of m tells us how strong the nuclear magnetism from the nuclei of interest (e. g. 1h) is. This slide considers the magnetization that occurs when a sample containing magnetic nuclei (e. g. , 1h, 31p) is placed in a large magnetic field.