RESUMO
BACKGROUND AND PURPOSE: The aim of this study was to investigate the potential of MRI to determine rotational alignment after TKA in comparison to the gold standard, CT. METHODS: Rotational alignment was measured in the transverse plane on CT and MR-images in 14 patients prior to TKA revision. Differences between CT and MRI measurements were analysed. RESULTS: There was a strong correlation between CT and MRI measurements for both the tibial (r = 0.929) and femoral (r = 0.942) components with a mean difference of 0.47 ± 1.3 and 0.13 ± 3.2 degrees, respectively. INTERPRETATION: Despite artefact formation, it can be concluded that the rotational alignment of metallic TKA components can be measured by MRI as accurately as by CT.
Assuntos
Artroplastia do Joelho/métodos , Articulação do Joelho , Imageamento por Ressonância Magnética , Amplitude de Movimento Articular/fisiologia , Humanos , Articulação do Joelho/diagnóstico por imagem , Articulação do Joelho/fisiologia , Articulação do Joelho/fisiopatologia , Articulação do Joelho/cirurgia , Tomografia Computadorizada por Raios XAssuntos
Doenças Cerebelares/induzido quimicamente , Síndrome Inflamatória da Reconstituição Imune/etiologia , Fatores Imunológicos/efeitos adversos , Leucoencefalopatia Multifocal Progressiva/induzido quimicamente , Esclerose Múltipla/tratamento farmacológico , Natalizumab/efeitos adversos , Adulto , Feminino , Humanos , Síndrome Inflamatória da Reconstituição Imune/tratamento farmacológico , Imunoglobulinas/administração & dosagem , Fatores Imunológicos/administração & dosagem , Natalizumab/administração & dosagemRESUMO
Sarcoidosis is a multisystemic granulomatous disease of unknown etiology. Neurologic manifestations occur usually as a part of the spectrum of the systemic disease. The aim of this retrospective study was to evaluate the role of magnetic resonance imaging (MRI) in the diagnosis of patients with neurosarcoidosis (NS). Seven patients with sarcoidosis could be included into the study. All patients had neurological symptoms and were evaluated with MRI revealing a wide spectrum of findings: periventricular and white matter lesions, multiple or solitary supra- and infratentorial brain lesions, leptomeningeal enhancement, involvement of brain nerves and intramedullar lesions. These findings are not specific for sarcoidosis and must be considered with the clinical course of the patient in arriving at the correct diagnosis.
