What does increased FLAIR signal mean?
Conclusions. An increase in FLAIR signal intensity of the fluid within the resection cavity of gliomas is a highly specific and early sign for tumor recurrence/tumor progression and can easily be used in the clinical routine.
What does the periventricular part of the brain do?
Periventricular white matter is composed of bundles of myelinated nerve fibers (axons). These bundles appear “white” due to the heavy myelination of these fast-conducting fiber tracts, which convey motor and sensory information to their targets within the spinal cord and cerebrum, respectively.
What does FLAIR mean on a brain MRI?
Fluid-attenuated inversion recovery (FLAIR) is an advanced magnetic resonance imaging sequence that reveals tissue T2 prolongation with cerebrospinal fluid suppression, allowing detection of superficial brain lesions.
What is periventricular white matter FLAIR?
The periventricular WMHs were defined as T2/FLAIR signal alterations in direct contact with the ventricular system. The deep WMHs were defined as T2/FLAIR signal alterations distant from the ventricular system. Periventricular and deep white matter WHMs could co-exist.
What is the difference between T2 and FLAIR?
The Flair sequence is similar to a T2-weighted image except that the TE and TR times are very long. By doing so, abnormalities remain bright but normal CSF fluid is attenuated and made dark….
| TR (msec) | TE (msec) | |
|---|---|---|
| T1-Weighted (short TR and TE) | 500 | 14 |
| T2-Weighted (long TR and TE) | 4000 | 90 |
| Flair (very long TR and TE | 9000 | 114 |
What is periventricular T2 FLAIR?
What does periventricular mean in medical terms?
Medical Definition of periventricular : situated or occurring around a ventricle especially of the brain periventricular white matter.
What does periventricular mean?
“Periventricular” refers to the area around the ventricles.
What causes periventricular white matter disease?
Major causes of periventricular white matter (PWM) lesions include normal changes from aging (then they are called UBO’s, for “unidentified bright objects), small strokes, and disorders related to multiple sclerosis (MS). PWM are also correlated with vitamin B6 (pyridoxine) deficiency.
What is a T2 flair signal abnormality?
Abnormally decreased T2/T2 FLAIR signal can be seen on brain imaging of patients who are experiencing clinical or subclinical seizures and can be associated with various intracranial pathologies. We identified 29 such patients. The abnormal signal was unilateral in 75.9% of patients.
What is periventricular T2 flair?
What is periventricular white matter disease?