MRI characteristics of acute and subacute brainstem and thalamic infarctions: value of T2- and diffusion-weighted sequences

Effects of Age and Symptom Status on Silent Ischemic Lesions after Carotid Stenting with and without the Use of Distal Filter Devices

“…The high contrast of this and similar imaging protocols has been shown recently to allow a clear delineation of acute lesions with good reader reproducibility. 17,18 The conventional MR imaging sequences included T2-weighted fluid-attenuated inversion recovery turbo spin-echo images (TR, 9000 ms; inversion time, 2200 ms; TE, 119 ms). In all of the subjects an MR angiography was performed before CAS using either a time-of-flight technique or a heavily T1-weighted, contrast bolus-enhanced 3D-gradient-echo sequence (TR, 3.2 ms; TE, 1.2 ms; flip angle, 30°; FOV, 300; section thickness, 60 -70 mm; 36 partitions).…”

Reduced-Distortion Diffusion MRI of the Craniovertebral Junction

“…[19][20][21] Acute stroke lesions in the brain stem are also often missed by DWI because of susceptibility artifacts. 22,23 Here we show that RS-EPI results-qualitatively and quantitatively-in significantly less distortion than SS-EPI in the diffusion trace images, especially at the base of the temporal lobe and the cerebellum. Overall RS-EPI was better than SS-EPI in 7/9 of our landmark locations.…”

Transient Vertical Nystagmus: An Unusual Presentation of Thalamic Infarct

“…These deficits were likely caused by a transient disturbance in the vestibuloocular pathway transversing the thalamus. Mild ataxic hemiparesis in this patient was explained by involvement of the descending corticobulbar and corticospinal pathways in the adjacent posterior limb of internal capsule [4].…”

“…There has been one previous case reported of transient vertical gaze palsy with resolution of symptoms within three hours, highlighting the role of the thalamus in vertical gaze in USA [3]. DWI-MRI has been widely used as imaging modality to detect acute cerebral infarction with sensitivity of 88% and specificity 95% [4].…”