Susceptibility weighted imaging: differentiating between calcification and hemosiderin
نویسندگان
چکیده
منابع مشابه
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...
متن کاملImagem ponderada em suscetibilidade magnética: diferenciando calcificação de hemossiderina* Susceptibility weighted imaging: differentiating between calcification and hemosiderin
Objetivo: Expor em detalhes o processamento da imagem ponderada em suscetibilidade magnética (susceptibility weighted imaging – SWI), destacando o efeito da escolha do tempo de eco e da máscara sensível à diferenciação de calcificação e hemossiderina simul-
متن کاملSusceptibility weighted imaging (SWI).
Susceptibility differences between tissues can be utilized as a new type of contrast in MRI that is different from spin density, T1-, or T2-weighted imaging. Signals from substances with different magnetic susceptibilities compared to their neighboring tissue will become out of phase with these tissues at sufficiently long echo times (TEs). Thus, phase imaging offers a means of enhancing contra...
متن کاملDetection of intratumoral calcification in oligodendrogliomas by susceptibility-weighted MR imaging.
BACKGROUND AND PURPOSE SWI is a unique pulse sequence sensitive to both hemorrhage and calcification. Our aim was to retrospectively assess the ability of SWI to detect intratumoral calcification in ODs compared with conventional MR imaging. MATERIALS AND METHODS Using CT as criterion standard, the MR imaging findings from 71 patients (33 males, 38 females; mean age, 42.5 years) with patholog...
متن کاملDiagnostic accuracy of susceptibility-weighted magnetic resonance imaging for the evaluation of pineal gland calcification
OBJECTIVES To determine the diagnostic performance of susceptibility-weighted magnetic resonance imaging (SWMR) for the detection of pineal gland calcifications (PGC) compared to conventional magnetic resonance imaging (MRI) sequences, using computed tomography (CT) as a reference standard. METHODS 384 patients who received a 1.5 Tesla MRI scan including SWMR sequences and a CT scan of the br...
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ژورنال
عنوان ژورنال: Radiologia Brasileira
سال: 2015
ISSN: 1678-7099,0100-3984
DOI: 10.1590/0100-3984.2014.0010