Fat Suppression in the Abdomen

Due to the different chemical environment, hydrogen nuclei in water- and in fat-tissue have different values for some MRI-relevant parameters, mainly being the relaxation time and the resonance frequency (chemical shift). These differences can be used to selectively suppress/reduce the signal of fat bound protons.Thus relaxation-dependant and chemical shift-dependant methods can be used for fat suppression. [...]

Spectral Adiabatic Inversion Recovery (SPAIR) MR imaging of the Abdomen

SPAIR (Spectral Adiabatic Inversion Recovery) is a powerful technique for fat suppression which offers advantages over conventional fat suppression techniques. The technique is insensitive to B1 inhomogenities and only fat spins are suppressed/inverted. [...]

Revisiting Liver Imaging with VIBE

Volume Interpolated Breath-hold Examination (VIBE) offers three-dimensional multiphase image acquisition before and following contrast administration on a breath-hold time scale. The dynamic behavior of liver lesions and structures during the precontrast, arterial, portal venous, early equilibrium and 5-minute delayed equilibrium phases of enhancement allows more accurate characterization than static pre- and postcontrast analysis. [...]

Tips for T2-weighted TSE Shoulder Imaging with Spectral Fat Saturation

Robust fat saturation can be achieved by different approaches including the application of inversion recovery sequences or advanced fat suppression pulses such as SPAIR. However, in some cases, such as the musculoskeletal imaging of the shoulder, the combination of a T2- weighted turbo spin echo (TSE) sequence with a conventional spectral fat saturation pulse is needed. When imaging obese or very tall patients, the shoulder has to be positioned off-center in many MR exams and therefore several factors will affect image quality with spectral fat saturation. This article provides tips on patient positioning and sequence set-up that will help you to achieve high quality spectral fat saturation. [...]