2017 Imaging for Physicists Coursebook

Water-fat shift

Magnetic field at the nucleus depends on magnetic shielding of surrounding electron clouds, depends on molecular environment

example: resonant frequencies of protons in fat and water differ by 3.4 ppm

Water

Fat

Signal intensity

-9

-6

-3

0

3

6

9

Chemical Shift (ppm)

Made with FlippingBook - Online catalogs