Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 1 de 1
Filtrar
Mais filtros










Base de dados
Intervalo de ano de publicação
1.
Gynecol Obstet Invest ; 79(2): 101-6, 2015.
Artigo em Inglês | MEDLINE | ID: mdl-25531860

RESUMO

AIM: To develop a magnetic resonance (MR)-visible mesh using iron oxides and prove visibility. METHODS: In a phantom study, a suitable iron oxide, Fe3O4 [iron(II,III) oxide] and FeOOH [iron(III) oxide-hydroxide], concentration was determined using relaxometric MR measurements of the transverse relaxation rates R2 and R2*. Next, a nonabsorbable mesh was designed from the MR-visible threads woven into a polypropylene mesh. The mesh was implanted into a fresh female cadaver via the transobturator route, and MR visibility was assessed with various MR pulse sequences in a clinical 3-tesla system. RESULTS: Optimal contrast was achieved with Fe3O4 at 0.2 weight-% in all imaging sequences, and the optimal contrast was achieved in a 3D spoiled gradient-echo (fast low-angle shot) acquisition. In this concentration range the apparent transverse relaxation rate R2* is below 10 ms. The mesh was visible in the cadaver on T1-weighted 3D spoiled gradient-echo images and T1-weighted fast spin-echo images. CONCLUSION: Mesh materials can be manufactured to be visible on MR with a negative contrast. Fe3O4 meshes could simplify follow-up examinations and help diagnose origins of postsurgical lesions after urogynecological procedures with mesh material.


Assuntos
Óxido Ferroso-Férrico , Imageamento por Ressonância Magnética/métodos , Prolapso de Órgão Pélvico/cirurgia , Polipropilenos , Telas Cirúrgicas , Cadáver , Feminino , Compostos Férricos , Humanos
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA
...