Contribuição do índice de intensidade de sinal na sequência t1 desvio químico associado à espectroscopia por ressonância magnética no diagnóstico dos adenomas adrenais

Detalhes bibliográficos
Ano de defesa: 2016
Autor(a) principal: Dalavia, Claudio Carvalho [UNIFESP]
Orientador(a): Não Informado pela instituição
Banca de defesa: Não Informado pela instituição
Tipo de documento: Tese
Tipo de acesso: Acesso aberto
Idioma: por
Instituição de defesa: Universidade Federal de São Paulo (UNIFESP)
Programa de Pós-Graduação: Não Informado pela instituição
Departamento: Não Informado pela instituição
País: Não Informado pela instituição
Palavras-chave em Português:
Link de acesso: https://sucupira.capes.gov.br/sucupira/public/consultas/coleta/trabalhoConclusao/viewTrabalhoConclusao.jsf?popup=true&id_trabalho=3934000
https://repositorio.unifesp.br/handle/11600/46146
Resumo: 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.