Imagem ponderada em suscetibilidade magnética: diferenciando calcificação de hemossiderina* Susceptibility weighted imaging: differentiating between calcification and hemosiderin

Susceptibility weighted imaging: differentiating between calcification and hemosiderin*

OBJECTIVE To present a detailed explanation on the processing of magnetic susceptibility weighted imaging (SWI), demonstrating the effects of echo time and sensitive mask on the differentiation between calcification and hemosiderin. MATERIALS AND METHODS Computed tomography and magnetic resonance (magnitude and phase) images of six patients (age range 41- 54 years; four men) were retrospectiv...

Anterior cerebral artery aneurysm rupture presenting as hemorrhage in the splenium of the corpus callosum

1. Hospital Universitário de Santa Maria (HUSM) – Universidade Federal de Santa Maria (UFSM), Santa Maria, RS, Brazil. Mailing address: Dr. Felipe Welter Langer. Departamento de Radiologia e Diagnóstico por Imagem, Hospital Universitário de Santa Maria – Universidade Federal de Santa Maria. Santa Maria, RS, Brazil, 97105-900. E-mail: [email protected]. restricted diffusion. There is typic...

Relationship between sounds and disc displacement of the temporomandibular joint using magnetic resonance imaging Relação entre ruído e deslocamento de disco da articulação temporomandibular utilizando imagem de ressonância magnética

Weighted Overlay, Fuzzy Logic and Neural Networks for Estimating Vegetation Vulnerability within the Ecological Economical Zoning of Minas Gerais, Brazil

This paper describes the research carried out within the framework of the Ecological Economical Zoning of Minas Gerais (ZEE-MG) to model vegetation vulnerability derived by a number of spatial inference methods. Methods based on weighted overlay, fuzzy logic, and neural networks were compared in terms of visual similarity between maps, the degree of restrictiveness concerning vulnerability, and...

New MR sequences in daily practice: susceptibility weighted imaging. A pictorial essay

BACKGROUND: Susceptibility-weighted imaging (SWI) is a relatively new magnetic resonance (MR) technique that exploits the magnetic susceptibility differences of various tissues, such as blood, iron and calcification, as a new source of contrast enhancement. This pictorial review is aimed at illustrating and discussing its main clinical applications. METHODS: SWI is based on high-resolution, th...