Table 1.
Hydrogen, phosphorus, and carbon gyromagnetic ratio, Larmor frequency at 3 T, % natural abundance, and relative sensitivity to 1H magnetic resonance spectroscopy accounting for % natural abundance of the isotopes and Larmor frequency, but not natural concentration of biomolecules in the brain.
| Isotope | Gyromagnetic ratio (MHz T-1) | Larmor frequency at 3 T (MHz) | Natural abundance (%) | Relative sensitivity |
|---|---|---|---|---|
| 1H | 42.58 | 127.74 | 99.99 | 1 |
| 31P | 17.24 | 51.72 | 100.00 | 0.0665 |
| 13C | 10.71 | 32.13 | 1.11 | 0.00018 |
Adapted from de Graaf (15).