what is spectrally selective fat suppressed Inversion recovery?
is like fat suppresed inversion recovery, except that it applies the 180 inverting pulse only to the protons of fat molecules. It can differentiate between the protons in fatty tissues and the protons in watery tissues by their chemical shift properties, and thus their different resonant frequencies. Since only the magnetization of fat protons is deflected by the frequency selective 180 RF pulse, it is easier to suppress only the fat signal with this technique, compared to the fat suppressed inversion recovery method in which all tissues with a similar T1 relaxation time to fat are suppressed. Plus this is effective when giving contrast