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T 2 *-weighted GRE sequences can detect microhemorrhages as seen in most vestibular schwannomas, thereby differentiating them from meningiomas. [2] The T 2 *-weighted GRE sequence can detect a "middle cerebral artery susceptibility sign", which is a dark linear filling defect that is wider than the corresponding artery on the contralateral side ...
Gradient recalled echo (GRE) imaging is the conventional way to detect hemorrhage in CAA, however SWI is a much more sensitive technique that can reveal many micro-hemorrhages that are missed on GRE images. [7] A conventional gradient echo T2*-weighted image (left, TE=20 ms) shows some low-signal foci associated with CAA.
To create a T2-weighted image, magnetization is allowed to decay before measuring the MR signal by changing the echo time (TE). This image weighting is useful for detecting edema and inflammation, revealing white matter lesions , and assessing zonal anatomy in the prostate and uterus .
Effective T2 or "T2-star" T2* Spoiled gradient recalled echo (GRE) with a long echo time and small flip angle [74] Low signal from hemosiderin deposits (pictured) and hemorrhages. [74] Susceptibility-weighted: SWI: Spoiled gradient recalled echo (GRE), fully flow compensated, long echo time, combines phase image with magnitude image [75]
Proton density weighted: PD: Long TR (to reduce T1) and short TE (to minimize T2). [4] Joint disease and injury. [5] High signal from meniscus tears. [6] (pictured) Gradient echo (GRE) Steady-state free precession: SSFP: Maintenance of a steady, residual transverse magnetisation over successive cycles. [7] Creation of cardiac MRI videos ...
Bucket-handle tear of the lateral meniscus (red). Medial meniscus intact (green). MRI, coronal T2 *-weighted GRE sequence. X-ray images (normally during weightbearing) can be obtained to rule out other conditions or to see if the patient also has osteoarthritis. The menisci themselves cannot be visualised with plain radiographs.
GMAT. GRE. Scores. 205–805. 130–170 for verbal and quantitative reasoning, 0–6 for analytical writing, 200-990 for every subject test. Sections. Analytical writing, integrated reasoning ...
These small regions of high intensity are observed on T2 weighted MRI images (typically created using 3D FLAIR) within cerebral white matter (white matter lesions, white matter hyperintensities or WMH) [1] [2] or subcortical gray matter (gray matter hyperintensities or GMH). The volume and frequency is strongly associated with increasing age. [2]
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