World Neurosurg
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To present values for the dose parameters predictive of alopecia as an adverse effect induced by neuroembolization using a biplane fluoroscopy. ⋯ The dose area product and the cumulative dose may be useful, intuitive factors for predicting the adverse effects of the neurointerventional radiation. Further multicenter research should be performed to confirm the efficacy and utility of the reference values of dose area product and cumulative dose for preventing excessive irradiation during neurointerventional procedures.
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Diffusion tensor imaging is currently the only noninvasive way to map subcortical white matter tractography. Radiologists and neurologists often fail to reconstruct the complex auditory pathways when applying the most commonly used approach, deterministic fiber tracking, as this method is limited in spatial and angular resolution. A different fiber-tracking method involving a probabilistic approach could partly compensate for these limitations. We investigated efficiency and potential usefulness of probabilistic fiber tracking in depicting human auditory pathways in healthy individuals and patients with unilateral vestibular schwannoma (VS). ⋯ The auditory pathway can be depicted well by probabilistic fiber tracking. This method can compensate in part for weaknesses of the widely used deterministic tractography approach in depicting fine and complicated subcortical fibers.
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Vasospasm (VSP)-related ischemic complications have been associated with poor outcomes in patients with subarachnoid hemorrhage due to ruptured blood blister-like aneurysms (BBAs) in the communicating segment of the internal carotid artery (ICA). The purpose of the present study was to investigate the incidence of, and factors related to, VSP-related cerebral infarction (VSP-CI) in patients with surgically treated BBAs in the communicating segment of the ICA. ⋯ The results of preoperative balloon test occlusion were less reliable for predicting postoperative ischemic complications of EC-IC bypass with trapping in patients with ruptured BBAs in the communicating segment of the ICA. However, anterior cerebral artery dominance ipsilateral to the ruptured aneurysm could be predictive for postoperative VSP-CI.
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Rete mirabile is a very rare vascular malformation and superior cerebellar artery (SCA) rete mirabile is not reported previously. We report a new case of rete mirabile of SCA initially detected by magnetic resonance imaging and transfemoral cerebral angiography. ⋯ We provide a first report in the literature of rete mirabile involving the SCA and suggest a descriptive knowledge of rete mirabile for clinicians during decision-making of treatment.
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Magnetic resonance imaging (MRI) artifacts of adjustable shunt devices are thought to be similar to metal clip artifacts, in that they are larger with higher field strength scanners. We have published several reports about the artifacts of new MRI-resistant adjustable shunt devices, and we found a case in which a 3.0-T scanner showed smaller artifacts than the 1.5-T scanner. We aimed to clarify whether this claim is true or not. ⋯ A 3.0-T scanner is recommended over a 1.5-T scanner for patients with MRI-resistant adjustable shunt devices in the diagnosis of acute ischemic condition or when using GE scanners.