Search results for " neuroradiologia."

Is there still a role for lesioning in functional neurosurgery: the Italian experience of delivering focused ultrasound high energy through a 1,5 tes…

2017

Tecnica, indicazioni e risultati trans-cranial MRgFUS

2015

Presentazione prima installazione nazionale di un apparecchiatura tcMRgFUS.

Is trans-cranial MR-guided Focused UltraSound a repeatable treatment option? Report of a successfully re-treated patient

2018

Background: In recent years, transcranial Magnetic Resonance-guided Focused UltraSounds (tcMRgFUS) treatments for functional neurological disorders are giving a new thrust to the field of therapeutic brain lesioning. This technique has been proven safe and effective in selected patients. Here we present the case of a patient affected by tremor combined with parkinsonism who underwent a second tcMRgFUS thalamotomy because of relapsing tremor after a few months from the first tcMRgFUS treatment. Materials and Methods: A 72-year-old, right-handed man, who came to our observation because of a disabling tremor affecting mainly his upper right limb and refusing any invasive surgical procedure. Hi…

EMORRAGIA IN TUMOR DA NEURINOMA DELL’VIII N.C. & SIMDROMI PARALITICHE ANTERIORE E POSTERIORE IMPROVVISA: SEMEIOTICA RADIOLOGICA

2011

Gli autori riportano un raro caso clinico di una paziente di 77 anni che giunge alla nostra osservazione in regime di urgenza per vertigine improvvisa associata a nausea e vomito, stato confusionale, atassia, paralisi completa del VI nervo cranico di destra con strabismo convergente, segni di sofferenza del IX, X ed XI nervo cranico omolaterali all’abducente e iniziale comparsa di segni statici e dinamici di paralisi periferica del VII nervo cranico di destra. L’insorgenza improvvisa di Sindromi paralitiche associate, anteriori e posteriori, ha indirizzato verso il sospetto di lesione occupante spazio a sede in fossa cranica posteriore/tronco encefalo richiedendo pertanto l’ausilio della di…

ROLE OF ENDOVASCULAR EMBOLIZATION IN THE MULTIDISCIPLINARY MANAGEMENT OF RUPTURED BRAIN ARTERIOVENOUS MALFORMATIONS

2022

Brain arteriovenous malformations (bAVMs) are congenital defects of vasculogenesis, the natural history of which is characterized by a significant morbidity and mortality related to the risk of bleeding. Their management remains challenging, since complete eradication is often difficult. Embolization, surgery, or radiosurgery alone are safe and effective for small unruptured AVMs, while a multidisciplinary approach should be pursued for larger ones. We report a case of intracerebral haemorrhage due to the rupture of a large bAVM, for which a multidisciplinary approach was adopted: endovascular partial embolization followed by complete surgical removal.

DCE and DSC perfusion MRI acquisition: diagnostic accuracy during the follow-up of the primary and metastatic intra-axial brain tumors treated by Ste…

Distinguishing radiation necrosis from tumor recurrence and tumor progression is crucial for the evaluation of treatment response and treatment planning. The appearance of treatment-induced tissue necrosis on conventional Magnetic Resonance Imaging (MRI) are very similar to brain tumor recurrence and it could be difficult to differentiate the two entities during the follow-up MRI examinations. Dynamic Susceptibility Contrast-enhanced (DSC) and Dynamic Contrast-Enhanced (DCE) are the MRI perfusion techniques using an exogenous, intravascular, no diffusible gadolinium-based contrast agent. The aim of this study is to compare the diagnostic accuracy of DSC and DCE perfusion MRI in the differen…

Superior Canal Dehiscence: Multidetector-Row CT Evaluation

2007

MRI Characterization of non-Gaussian water diffusion in the brain using Diffusion Kurtosis Imaging (DKI)

2016

Diffusion tensor imaging (DTI) is the most commonly used technique to extract microstructural features from a set of diffusion-weighted images. In addition to the metrics obtained with DTI, diffusion kurtosis imaging (DKI) can provide non-Gaussian diffusion measures by means of the kurtosis tensor. DKI give an dimensionless measure that quantifies the deviation of the water diffusion displacement profile from the Gaussian distribution of unrestricted diffusion, providing a measure of the degree of diffusion hindrance or restriction. DKI has shown to be more sensitive to tissue microstructural changes in both normal and pathological neural tissue. The aim of this work is the description of t…

Functional connectivity modulation induced by transcranial direct current stimulation of the motor network: a Resting-State fMRI study

2016

Resting-state functional connectivity represents a novel fMRI approach that allows detection of temporal correlations in spontaneous BOLD signal oscillations while subjects rest quietly in the scanner. Functional connectivity (FC) can be defined as the synchrony of neural activity among spatially distant regions. Transcranial direct current stimulation (tDCS) is a non-invasive brain stimulation technique that is known to modulate cortical activity and FC among brain regions. This study is aimed at measuring the variation of functional connectivity between cortical brain regions after tDCS along time. The temporal concatenation group ICA showed that immediately after anodal stimulation the a…

Long-lasting coma.

2014

n this report, we describe the case of a patient who has remained in a comatose state for more than one year after a traumatic and hypoxic brain injury. This state, which we refer to as long-lasting coma (LLC), may be a disorder of consciousness with significantly different features from those of conventional coma, the vegeta- tive state, or brain death. On the basis of clinical, neu- rophysiological and neuroimaging data, we hypothe- size that a multilevel involvement of the ascending reticular activating system is required in LLC. This description may be useful for the identification of other patients suffering from this severe disorder of con- sciousness, which raises important ethical i…