RESUMO
PURPOSE: To determine normal magnetic resonance (MR) imaging enhancement characteristics of the lumbosacral spine after intravenous administration of an expanded dose of gadopentetate dimeglumine. MATERIALS AND METHODS: T1-weighted MR images of the lumbosacral spine were acquired before and after injection of 0.3 mmol/kg gadopentetate dimeglumine in 12 healthy subjects (eight men, four women; age range, 22-57 years). RESULTS: In 10 (91%) of the 11 subjects who completed the investigation, multifocal linear enhancement within the thecal sac that generally extended from the conus to the nerve-root sheaths was demonstrated. In all cases, enhancement was seen in the facet joints and the intervertebral disks parallel to the vertebral end-plates. CONCLUSION: After an expanded dose of intravenous gadopentetate dimeglumine, multiple intrathecal and extrathecal structures were enhanced. Recognition of normal enhancement patterns after an expanded gadopentetate dimeglumine dose is important because such enhancement after routine injection of 0.1 mmol/kg gadopentetate dimeglumine is often thought to indicate disease.
Assuntos
Meios de Contraste , Meglumina , Compostos Organometálicos , Ácido Pentético/análogos & derivados , Coluna Vertebral/anatomia & histologia , Adulto , Meios de Contraste/administração & dosagem , Combinação de Medicamentos , Feminino , Gadolínio DTPA , Humanos , Masculino , Meglumina/administração & dosagem , Pessoa de Meia-Idade , Compostos Organometálicos/administração & dosagem , Ácido Pentético/administração & dosagemRESUMO
We describe the radiologic investigation of two patients with primary left atrial myxoma who presented with embolic manifestations in the brain. MRI and CT showed multiple infarcts, while the cardiac atrial mass was demonstrated in one of the patients by MRI and in both by echocardiography.