Sinais em neurorradiologia: parte 1

Gonçalves, Fabrício Guimarães; Barra, Filipe Ramos; Matos, Valter de Lima; Jovem, Cássio Lemos; Amaral, Lázaro Luís Faria do; DelCarpio-O'Donovan, Raquel

doi:10.1590/s0100-39842011000200013

Cited by 9 publications

(7 citation statements)

References 16 publications

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“…The technology of medical imaging, such as digital cerebral angiography and three-dimensional (3D) mapping of brain vessels, has achieved relevant advances in interventional neuroradiology. A number of recent publications in Brazil highlight the importance of neuroradiology for diagnosis and treatment of several diseases (1)(2)(3)(4)(5)(6)(7)(8)(9)(10) .…”

Section: -3984 © Colégio Brasileiro De Radiologia E Diagnóstico Pmentioning

confidence: 99%

Evaluation of occupational and patient dose in cerebral angiography procedures

et al. 2013

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Objective: The present study was aimed at estimating the doses received by physicians and patients during cerebral angiography procedures in a public hospital of Recife, PE, Brazil. Materials and Methods: The study sample included 158 adult patients, and during the procedures the following parameters were evaluated: exposure parameters (kV, mAs), number of acquired images, reference air kerma value (K a,r) and air kerma-area product (P KA). Additionally, the physicians involved in the procedures were evaluated as for absorbed dose in the eyes, thyroid, chest, hands and feet. Results: The results demonstrated that the doses to the patients' eyes region were relatively close to the threshold for cataract occurrence. As regards the physicians, the average effective dose was 2.6 µSv, and the highest effective dose recorded was 16 µSv. Conclusion: Depending on the number of procedures, the doses received by the physicians may exceed the annual dose limit for the crystalline lenses (20 mSv) established by national and international standards. It is important to note that the high doses received by the physicians are due to the lack of radiation protection equipment and accessories, such as leaded curtains, screens and protective goggles.

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Section: -3984 © Colégio Brasileiro De Radiologia E Diagnóstico Pmentioning

confidence: 99%

Evaluation of occupational and patient dose in cerebral angiography procedures

et al. 2013

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“…The inversion sign is seen on CT without contrast as an image in which the normal relationship between gray and white parenchyma occurs; the gray matter presents relative hypoattenuation in relation to the adjacent white matter [2,3,20,24]. Showing a relative increase in the density of the cerebellum, basal ganglia and thalamus [25].…”

Section: Diagnosismentioning

confidence: 99%

White Cerebellum Sign: case series and literature review

Pereira¹,

Carvalho²,

Rabelo³

et al. 2020

Arch Pediat Neurosurg

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Introduction: The white cerebellum sign is a rare radiological finding, seen in severe traumatic brain injury and severe hypoxia. Radiologically, it is characterized by cerebellar hyperdensity, associated with diffuse cerebral hemispheres hypoattenuation. This paper aims to guide the white cerebellum sign diagnosis in traumatic craniocerebral injuries or not in pediatric patients. Patients and Methods: The authors present a series of five cases that showed the white cerebellum sign from the period about 2007 and 2010, associated with a literature review. Results: The white cerebellum sign was present in 5 patients, three of them were male and 2 female. The mean age was 22 months. The causes of which were: traumatic brain injury (3), drowning (1) and metabolic encephalopathy (1). The skull computerized tomography scan was performed in all cases. All patients were submitted to conservative treatment. There were four deaths and one survived with severe neurological sequelae. Conclusion: The white cerebellum sign is associated with irreversible brain damage, and its pathophysiology is controversial. The imaging tests are important to diagnosis. It has a poor prognosis, associated with the development of diffuse cerebral atrophy or cystic encephalomalacia in those who survive.

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“…Another sign associated with severe ischemic damage is the reversal sign, where the gray matter appears hypodense with respect to the white matter, in contrast to the normal appearance where gray matter is denser ( 57 ).…”

Section: White Cerebellum Signmentioning

confidence: 99%

Signs in Neuroradiology: A Pictorial Review

et al. 2017

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One of the major problems radiologists face in everyday practice is to decide the correct diagnosis, or at least narrow down the list of possibilities. In this context, indicative evidences (signs) are useful to recognize pathologies, and also to narrow the list of differential diagnoses. Despite classically being described for a single disease, or a closely related family of disorders, most indications are not restricted exclusively to their traditional definition. Therefore, using signs for prognosis requires knowledge of the mechanism of their appearance, and which pathologies they are observed in. In this study, we demonstrate some of the more common and useful neuroradiologic signs with relevant images, and discuss their use in differential diagnosis.

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Sinais em neurorradiologia: parte 1

Cited by 9 publications

References 16 publications

Evaluation of occupational and patient dose in cerebral angiography procedures

Evaluation of occupational and patient dose in cerebral angiography procedures

White Cerebellum Sign: case series and literature review

Signs in Neuroradiology: A Pictorial Review

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