| Texto completo | |
| Autor(es): Mostrar menos - |
da Silva, P. D. A.
[1]
;
Uscategui, R. A. R.
[2]
;
Santos, V. J. C.
[1]
;
Taira, A. R.
[1]
;
Mariano, R. S. G.
[1]
;
Rodrigues, M. G. K.
[1]
;
Simoes, A. P. R.
[1]
;
Maronezi, M. C.
[2]
;
Avante, M. L.
[2]
;
Vicente, W. R. R.
[1]
;
Feliciano, M. A. R.
[3, 1]
Número total de Autores: 11
|
| Afiliação do(s) autor(es): | [1] Univ Estadual Paulista, Sch Agr & Vet Sci, Dept Anim Reprod, Jaboticabal - Brazil
[2] Univ Estadual Paulista, Sch Agr & Vet Sci, Dept Clin & Vet Surg, Jaboticabal - Brazil
[3] Univ Fed Reconcavo Bahia, Sect Diagnost Imaging, Cruz das Almas - Brazil
Número total de Afiliações: 3
|
| Tipo de documento: | Artigo Científico |
| Fonte: | REPRODUCTION IN DOMESTIC ANIMALS; v. 53, n. 3, p. 725-732, JUN 2018. |
| Citações Web of Science: | 2 |
| Resumo | |
Contents The aim of this study was to examine foetal organs and placental tissue to establish a correlation between the changes in the composition of these structures associated with their maturation and the ultrasonographic characteristics of the images. Twenty-four pregnant ewes were included in the study. Ultrasonography assessments were performed in B-mode, from the ninth gestational week until parturition. The lungs, liver and kidneys of foetuses and placentomes were located in transverse and longitudinal sections to evaluate the echogenicity (hypoechoic, isoechoic, hyperechoic or mixed) and echotexture (homogeneous and heterogeneous) of the tissues of interest. For quantitative evaluation of the ultrasonographic characteristics, it was performed a computerized image analysis using a commercial software (Image ProPlus((R))). Mean numerical pixel values (NPVs), pixel heterogeneity (standard deviation of NPVs) and minimum and maximum pixel values were measured by selecting five circular regions of interest in each assessed tissue. All evaluated tissues presented significant variations in the NPVs, except for the liver. Pulmonary NPVmean, NPVmin and NPVmax decreased gradually through gestational weeks. The renal parameters gradually decreased with the advancement of the gestational weeks until the 17th week and later stabilized. The placentome NPVmean, NPVmin and NPVmax decreased gradually over the course of weeks. The hepatic tissue did not show echogenicity and echotexture variations and presented medium echogenicity and homogeneous echotexture throughout the experimental period. It was concluded that pixels numerical evaluation of maternal-foetal tissues was applicable and allowed the identification of quantitative ultrasonographic characteristics showing changes in echogenicity related to gestational age. (AU) | |
| Processo FAPESP: | 12/16635-2 - Elastografia, ultrassonografia com contraste por microbolhas e Doppler como métodos de diagnóstico das neoplasias mamárias, afecções prostáticas e testiculares em cães |
| Beneficiário: | Marcus Antônio Rossi Feliciano |
| Modalidade de apoio: | Auxílio à Pesquisa - Jovens Pesquisadores |
| Processo FAPESP: | 13/06443-1 - Elastografia, ultrassonografia com contraste por microbolhas e Doppler como métodos de diagnóstico das neoplasias mamárias, afecções prostáticas e testiculares em cães |
| Beneficiário: | Marcus Antônio Rossi Feliciano |
| Modalidade de apoio: | Bolsas no Brasil - Jovens Pesquisadores |