Effect of Water Fraction in Selection of Optimal TI Value for STIR Sequences

    loading  Checking for direct PDF access through Ovid

Abstract

Objective

This article describes the effect of the water fraction in the selection of the optimal T1 value in a STIR sequence. This effect has been given little consideration in previous studies.

Materials and Methods

Therefore, using both STIR combined with the Dixon method (opposed-phase STIR) and conventional STIR (in-phase STIR), we have investigated the effect of the water fraction in the selection of an optimal TI value for the STIR sequence.

Results

Our findings have indicated that the water protons rather than the olefinic protons ( – CH = CH – ) play a major role in the opposed-phase effect in vivo.

Conclusion

Thus, it has been concluded that the most effective fat suppression can be achieved when the intravoxel phase cancellation effect between the water and lipid protons is maximal, rather than when the longitudinal magnetization of the lipid protons is minimal.

Related Topics

    loading  Loading Related Articles