Journal of neuroimaging : official journal of the American Society of Neuroimaging
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Amyotrophic Lateral Sclerosis (ALS) is characterized by extensive corticospinal damage, but extrapyramidal involvement is suggested in pathological studies. Texture analysis (TA) is an image processing technique that evaluates the distribution of gray levels between pixels in a given region of interest (ROI). It provides quantitative data and has been employed in several neurodegenerative disorders. Here, we used TA to investigate possible deep gray nuclei (DGN) abnormalities in a cohort of ALS patients. ⋯ TA of T1 weighted images revealed DGN alterations in patients with ALS, namely in the thalami and caudate nuclei.
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Spinal nerve root enhancement in pediatric patients is generally nonspecific, and clinical and laboratory correlation is essential. Nerve root enhancement indicates lack of integrity of the blood-nerve barrier. ⋯ Familiarity with the various pathologic entities associated with spinal nerve root enhancement is important for a concise differential diagnosis in the appropriate clinical setting. This will avoid unnecessary additional investigations.
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Comparative Study
Terson's Syndrome: Diagnostic Comparison of Ocular Sonography and CT.
To assess the accuracy of ocular B-mode sonography and of standard head computed tomography (CT) as screening tools for intraocular hemorrhages related to subarachnoid hemorrhage (SAH). ⋯ Ocular sonography identifies SAH-related preretinal and vitreous hemorrhages with high accuracy and is superior to standard head CT. It may be considered as new and useful bedside diagnostic tool for routine clinical care of patients with SAH.
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The vertical-occipital fasciculus (VOF), historically named as "the fasciculus occipitalis verticalis of Wernicke," has been recently brought to the attention of the neuroscience community. In this study, we delineated and quantified this tract with deterministic diffusion tensor imaging protocol. ⋯ We believe that our work will pave the way for future imaging studies investigating VOF in different conditions such as stroke, traumatic brain injury, and multiple sclerosis.
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To assess the diagnostic value of parenchymal hyperdense lesions visualized on the flat-panel CT scan in detecting/excluding intraparenchymal hemorrhage (IPH) after the endovascular treatment of acute stroke patients. ⋯ The absence of hyperdense lesions on immediate postprocedural flat-panel CT scan of ischemic stroke patients can exclude IPH with a high sensitivity and negative predictive value. The hyperdense parenchymal lesions visualized on flat-panel versus multidetector CT studies may have comparable sensitivity and negative predictive value for the detection of IPH.