Type:
Educational Exhibit
Keywords:
Neuroradiology brain, MR, Diagnostic procedure, Infection, Inflammation
Authors:
V. Njagulj, K. Koprivsek, J. Boban, M. Bjelan, D. Kozic, O. Sveljo, M. A. Lucic; Sremska Kamenica, Novi Sad/RS
DOI:
10.1594/ecr2013/C-1617
Background
FLAIR has high sensitivity in discovering pathological lesions in brain parenchyma,
whereas most of the lesions demonstrate hyperintensity in comparison to the normal brain parenchyma.
In a small number of lesions FLAIR heterogeneous or hypointense signal can be observed.
- FLAIR MR imaging has assumed an important role in routine brain imaging
- Enhance the visibility of several abnormal lesions compared with T2-weighted spin-echo MR imaging sequences
Signal intensity (SI) is result of complex interactions between the relaxation times (T1 and T2) of the lesion and the pulse parameters (TR,
TE,
and TI) of the FLAIR MR imaging sequence.
Increase TE of the FLAIR MR imaging sequence and define the transition from hyperintense to hypointense lesions (1).