Navegando por Palavras-chave "neoplasias das glândulas suprarrenais i"

Agora exibindo 1 - 1 de 1
  • Imagem de Miniatura
    Item
    Acesso aberto (Open Access)
    Contribuição do índice de intensidade de sinal na sequência t1 desvio químico associado à espectroscopia por ressonância magnética no diagnóstico dos adenomas adrenais
    (Universidade Federal de São Paulo (UNIFESP), 2016-12-15) Dalavia, Claudio Carvalho [UNIFESP]; Ajzen, Sergio Aron [UNIFESP]; Universidade Federal de São Paulo (UNIFESP)
    OBJECTIVE. To investigate the advantages of using modified signal intensity measurements on chemical shift imaging alone or correlate with proton spectroscopy in the differential diagnosis of adrenal adenomas. SUBJECTS AND METHODS. 97 patients (69 adenomas, 8 carcinomas, 14 pheochromocytomas, 4 metastasis, 1 myelolipoma and 1 granulomatous lesion) underwent chemical shift imaging and spectroscopy. Signal intensity index was calculated as [(signal intensity on in-phase image ? signal intensity on out-of-phase image) / (signal intensity on in-phase image)] × 100%. The averages of three minimum, mean, and maximum signal intensity values measured on three consecutive images, in the smaller lesions if not possible we use one or two images, with the region of interest covering one-half to two-thirds of the mass. All indexes were compared with spectroscopy metabolite ratios (lactate/creatine, glutamine-glutamate/creatine, choline/creatine, choline/lipid, 4.0?4.3 ppm/creatine, and lipid/creatine) for each type of adrenal mass. RESULTS. All signal intensity measurements and spectroscopy metabolite ratios were significant to the differentiation between adenomas and no adenomas, except Lip/Cr and Cho/Lip. Was not possible to apply the spectroscopy in 37,75% of the cases. CONCLUSION. The signal intensity index and spectroscopy metabolite ratios increased the accuracy of the differential diagnosis of adrenal adenomas.