Journal of neuroimaging : official journal of the American Society of Neuroimaging
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Comparative Study
Comparison of magnetic resonance angiography scans on 1.5, 3, and 7 Tesla units: a quantitative study of 3-dimensional cerebrovasculature.
Although multiple studies demonstrate benefits of high field imaging of cerebrovasculature, a detailed quantitative analysis of complete cerebrovascular system is unavailable. To compare quality of MR angiography (MRA) acquisitions at various field strengths, we used 3-dimensional (3D) geometric cerebrovascular models extracted from 1.5 T/3 T/7 T scans. ⋯ Our approach differs from standard approaches based on visual assessment and signal (contrast)-to-noise ratio. It also measures absolute acquisition performance, provides a unique length-volume relationship, and predicts length/volume for intermediate teslages.
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Investigating the heritability of brain structure may be useful in simplifying complicated genetic studies in temporal lobe epilepsy (TLE). A preliminary study is presented to determine if volume deficits of candidate brain structures present at a higher rate in unaffected siblings than controls subjects. ⋯ The findings suggest an overlap in the neurodevelopmental genes responsible for both brain structure and the expression of the disease. Further work is ongoing to confirm these findings.
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Intracranial epidermal cysts are benign uncommon lesions. Such lesions arise from an inclusion of an ectodermal element during neural tube closure, in which dermal elements become trapped in the suture line, diploe, meninges, or scalp. Reports have extensively demonstrated the typical magnetic resonance (MR) spectra with the presence of large lactate signals with a virtual absence of healthy brain metabolites. ⋯ In this report, we describe a case of an epidermal cyst with an unusual metabolic pattern observed by magnetic resonance spectroscopy mimicking a brain abscess.
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Internal carotid artery (ICA) elongation (coiling and kinking) has been suggested as a risk factor for carotid dissection. Since vasomotion is known to be impaired in spontaneous cervical vessel dissection, we investigated whether endothelial-dependent vasodilation in subjects with carotid coiling and kinking is compromised. ⋯ Among subjects with carotid elongation, those with severe kinking have an impaired endothelial-dependent vasodilation and might be prone to carotid dissection.
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Recent reports have indicated that mechanical thrombectomy may have the potential to treat acute ischemic stroke. This study aims to describe the safety and effectiveness of Trevo Retriever, using Stentriever technology, in revascularization of patients with acute ischemic stroke. ⋯ Early clinical experience suggests that the TR can allow safe and effective revascularization in certain subjects with acute ischemic stroke.