Rivista Di Neuroradiologia 

About: Rivista Di Neuroradiologia is an academic journal published by SAGE Publishing. The journal publishes majorly in the area(s): Magnetic resonance imaging & Aneurysm. It has an ISSN identifier of 1971-4009. Over the lifetime, 3888 publications have been published receiving 15368 citations.

Resting state fMRI: A review on methods in resting state connectivity analysis and resting state networks.

Abstract: The inquisitiveness about what happens in the brain has been there since the beginning of humankind. Functional magnetic resonance imaging is a prominent tool which helps in the non-invasive examination, localisation as well as lateralisation of brain functions such as language, memory, etc. In recent years, there is an apparent shift in the focus of neuroscience research to studies dealing with a brain at 'resting state'. Here the spotlight is on the intrinsic activity within the brain, in the absence of any sensory or cognitive stimulus. The analyses of functional brain connectivity in the state of rest have revealed different resting state networks, which depict specific functions and varied spatial topology. However, different statistical methods have been introduced to study resting state functional magnetic resonance imaging connectivity, yet producing consistent results. In this article, we introduce the concept of resting state functional magnetic resonance imaging in detail, then discuss three most widely used methods for analysis, describe a few of the resting state networks featuring the brain regions, associated cognitive functions and clinical applications of resting state functional magnetic resonance imaging. This review aims to highlight the utility and importance of studying resting state functional magnetic resonance imaging connectivity, underlining its complementary nature to the task-based functional magnetic resonance imaging.

Endovascular treatment of cerebral aneurysms using flow-diverter devices: A systematic review.

Abstract: BackgroundFlow-diverter devices (FDDs) are new-generation stents placed in the parent artery at the level of the aneurysm neck to disrupt the intra-aneurysmal flow thus favoring intra-aneurysmal thrombosis.ObjectiveThe objective of this review article is to define the indication and results of the treatment of intracranial aneurysms by FDD, reviewing 18 studies of endovascular treatment by FDDs for a total of 1704 aneurysms in 1483 patients.MethodsThe medical literature on FDDs for intracranial aneurysms was reviewed from 2009 to December 2014. The keywords used were: “intracranial aneurysms,” “brain aneurysms,” “flow diverter,” “pipeline embolization device,” “silk flow diverter,” “surpass flow diverter” and “FRED flow diverter.”ResultsThe use of these stents is advisable mainly for unruptured aneurysms, particularly those located at the internal carotid artery or vertebral and basilar arteries, for fusiform and dissecting aneurysms and for saccular aneurysms with large necks and low dome-to-neck ratio. ...

Follow-up Study after Intracranial Percutaneous Transluminal Cerebral Balloon Angioplasty

Abstract: BACKGROUND AND PURPOSE Our objective was to find the specific angiographic characteristics of atherosclerotic lesions that indicate suitability for intracranial percutaneous transluminal cerebral balloon angioplasty (PTCBA). METHODS Forty-two clinically symptomatic patients with 42 hemodynamically significant intracranial lesions (>70% stenosis) were treated by PTCBA between January 1992 and May 1996. Before treatment, the patients were assigned to three groups according to the angiographic characteristics of the lesions, as follows: type A, short (5 mm or less in length) concentric or moderately eccentric lesions less than totally occlusive; type B, tubular (5 to 10 mm in length), extremely eccentric or totally occluded lesions, less than 3 months old; and type C, diffuse (more than 10 mm in length), extremely angulated (>90 degrees) lesions with excessive tortuosity of the proximal segment, or totally occluded lesions, and 3 months old or older. The patients were followed up for a period of 1 month to 6 years to compare the results of PTCBA treatment among the three groups. Primary end points were death, stroke, or bypass surgery. RESULTS The clinical success rates for the type A, B, and C groups were 92%, 86%, and 33%, respectively. Cumulative risks of fatal or nonfatal ischemic stroke or ipsilateral bypass surgery in type A, B, and C groups were 8%, 26%, and 87%, respectively. The cumulative risk of 8% among patients in the type A group appeared to be smaller than in studies reported in the literature. CONCLUSION PTCBA for intracranial simple (type A) lesions yields a favorable clinical outcome for symptomatic patients.

Pathogenesis of Chiari Malformation: A Morphometric Study of the Posterior Cranial Fossa

Abstract: To investigate overcrowding in the posterior cranial fossa as the pathogenesis of adult type Chiari malformation, we morphometrically studied the brainstem and cerebellum within the posterior cranial fossa as well as the occipital bone while taking into consideration their embryological development.Compared with the control group, the Chiari group had a significantly larger “volume ratio” as PFBV/PFCV, the three occipital enchondral parts (the basiocciput, exocciput and supraocciput) were significantly smaller and the tentorium was much steeper. There was no significant difference in the posterior fossa brain volume or in the axial lengths of the hindbrain (the brainstem and cerebellum). These results suggest that in adult type Chiari malformation an underdeveloped occipital bone, possibly due to underdevelopment of the occipital somite originating from the paraxial mesoderm, induces overcrowding in the posterior cranial fossa which contains the normally developed hindbrain, and secondary the cerebellar t...

Dynamic Neutralization: A New Concept for Restabilization of the Spine:

Abstract: In the natural evolution of degeneration of the intervertebral disc and facets, from failure of the disc, to arthritis of the facets, subsiding of the upper vertebra into the lower one and finally stenosis or fused deformation, the functional tripod (disc and facets) go through different stages of instability. We strongly believe, that an anatomical stabilization of the disc and facets could stop this evolution of destabilization. The concept of the spinal implant presented here is the re-stabilization of one or more segments still allowing a controlled range of motion. To overcome non-physiological movements we developed a system called DYNESYS (DYnamic NEutralization SYstem for the Spine). DYNESYS is composed of ProtasulTM 100 pedicular screws, SuleneTM-PET cords and SuleneTM-PCU spacers. The cord is introduced through the screw heads and the spacers placed in-between and fixed after