Assuntos
Extração Obstétrica/história , Feminino , Alemanha , História do Século XIX , Humanos , Recém-Nascido , GravidezRESUMO
MRI with zero echo time (ZTE) is achieved by 3D radial centre-out encoding and hard-pulse RF excitation while the projection gradient is already on. Targeting short-T(2) samples, the efficient, robust and silent ZTE approach was implemented for high-bandwidth high-resolution imaging requiring particularly rapid transmit-receive switching and algebraic image reconstruction. The ZTE technique was applied to image extracted human teeth at 11.7T field strength, yielding detailed depictions with very good delineation of the mineralised dentine and enamel layers. ZTE results are compared with UTE (ultra-short echo time) MRI and micro-computed tomography (µCT), revealing significant differences in SNR and CNR yields. Compared to µCT, ZTE MRI appears to be less susceptible to artefacts caused by dental fillings and to offer superior sensitivity for the detection of early demineralisation and caries lesions.
Assuntos
Imageamento por Ressonância Magnética/métodos , Dente/anatomia & histologia , Humanos , Incisivo/anatomia & histologia , Incisivo/diagnóstico por imagem , Dente Molar/anatomia & histologia , Dente Molar/diagnóstico por imagem , Dente Serotino/anatomia & histologia , Dente Serotino/diagnóstico por imagem , Razão Sinal-Ruído , Fatores de Tempo , Dente/diagnóstico por imagem , Microtomografia por Raio-XRESUMO
This paper presents results from measurements of viscosity of suspensions of Yttrium Oxide Y2O3 ceramic nanopowder in ethyl alcohol. The study was conducted at the request of and in cooperation with the ICMB. This research will add important information about the formation and viscosity characteristics of suspensions of nanopowders. The behavior of nanopowder suspensions has been examined in a wide range of shear rates from 0.01 s(-1) to 2000 s(-1). Additionally, the behavior of the suspension has been studied in the temperature range from -15 degrees C to 20 degrees C. Complementary experiments have been performed by application of a Rheo-NMR at Bruker Biospin and by the use of RheoScope at ThermoFisher companies.
RESUMO
BACKGROUND: Only 2% of all extranodal primary lymphomas affect the female genital tract. Involvement of the fallopian tubes by primary lymphoma is extremely rare. CASE: A 34-year-old patient presented with the symptoms of salpingitis. Laparoscopy with salpingectomy was performed. Salpingitis caused by Acinetobacter species was diagnosed and antibiotic treatment was administered. Histologic examination of the fallopian tube revealed primary extranodal marginal zone B-cell lymphoma (MALT-type lymphoma) of the fallopian tube. After 12 months no tumoral recurrence occurred. CONCLUSION: Although the female genital tract is rich in mucosa and the existence of mucosa-associated lymphoid tissue (MALT) has been demonstrated previously, extranodal marginal zone B-cell lymphoma of the fallopian tube is exceptional. To our knowledge only two cases with extranodal marginal zone B-cell lymphoma of the fallopian tube have been previously reported. Existence of inflammation close to the tumor is interesting to emphasize.
