Fluid-attenuated inversion recovery
(FLAIR) images showed extensive ischemic gliotic changes in centrum semiovale, periventricular and subcortical white matter, basal ganglia, temporal lobes and also in pontin area bilaterally (Figure 1 C, D).
[DWI: diffusion-weighted image, ADC: apparent diffusion coefficient, FLAIR: fluid-attenuated inversion recovery
, MRI: magnetic resonance image]; patient received IV corticosteroids and supportive treatment.
Magnetic resonance imaging of the brain with fluid-attenuated inversion recovery
sequences showed bilateral, multiple ill-defined foci of abnormal signal intensity involving the parietal and insular regions, some showing cystic centers.
Secondary objectives included determining the diagnostic performance of 18F-fluciclovine PET and MRI compared with various types of MRI: CE-T1W MRI alone; fluid-attenuated inversion recovery
(or T2-weighted MRI) alone; and FLAIR (or T2W) MRI and CE-T1W MRI in combination.
Brain MRI demonstrated asymmetric hyperintense signal abnormalities in bilateral occipital lobes on fluid-attenuated inversion recovery
(FLAIR) and T2-weighted images with no diffusion restriction, consistent with vasogenic edema [Figure 1]a,[Figure 1]b,[Figure 1]c.
Magnetic resonance imaging for a 54-year-old man with progressive multifocal leukoencephalopathy after treatment with nivolumab, showing typical multifocal lesions: diffusion weighted imaging hyperintensity (A, B) with no decrease in the apparent diffusion coefficient (C, D), corresponding patchy corticosubcortical hyperintensities on fluid-attenuated inversion recovery
image (E, F) without enhancement on T1-weighted imaging after administration of gadolinium (G, H).
Sixty-five patients underwent serial isotropic 3-dimension fluid-attenuated inversion recovery
sequence imaging (162 images) as well as transcranial and extracranial color-coded sonography.
Recently developed post contrast fluid-attenuated inversion recovery
imaging and high-resolution blood oxygen level dependent MR venography may also increase sensitivity in detecting the leptomeningeal angioma (10).
The standardized protocols consist of the following scanning sequences: sagittal T1-weighted spin echo, axial T2-weighted fast spin echo, coronal oblique fast fluid-attenuated inversion recovery
, coronal oblique fast multiplanar inversion recovery, axial diffusion (single-shot, spin echo planar), b = 1000, all directions), and axial three-dimensional spoiled gradient recalled echo.
Magnetic Resonance Imaging (MRI) brain revealed diffuse increased signal intensity on T2-weighted and fluid-attenuated inversion recovery
(FLAIR) images in the cerebral white matter.
Magnetic resonance imaging reveals a large right frontal area of increased signal on fluid-attenuated inversion recovery
(FLAIR), which does not enhance on postcontrast imaging (Fig l).
Restricted diffusion precedes signal abnormalities seen on fluid-attenuated inversion recovery
(FLAIR) images and is also known to resolve earlier than the FLAIR signal abnormalities during the recovery period .