Conclusion

In recent years several sequences have been developed including gradient echo imaging/^ fast spin echo imaging/^ magnetization transfer imaging'^^’'^* short tau inversion recovery (STIR) imaging"*^ and difiusion imaging/^ All have advantages compared to standard spin echo magnetic resonance imaging in certain special applications. 3D fast FLAIR provides a high contrast for lesions with long T2 relaxation time in combination with thin slices which results in high conspicuity and good demarcation of tumours. Thus, 3D fast FLAIR may be a useful diagnostic tool in the presurgical work up of patients with non enhancing tumours where assessment of the tumour margins with standard imaging is difficult.

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Chapter 3