To describe the ARFI elastography in the evaluation of the adrenal glands in adult dogs, to evaluate the stiffness of adrenal parenchyma and to determine the qualitative and quantitative standards of the ARFI technique, which have not yet been described in veterinary medicine. Sixty adrenal glands from thirty healthy adult dogs were evaluated by B-mode and qualitative and quantitative ARFI elastography to assess the stiffness of healthy parenchyma and to determine the quality and quantity (shear velocity) standards of ARFI technique in body, cranial and caudal adrenal poles. Findings of ultrasonography evaluations were normal. Qualitative elastography showed that adrenal glands were not deformable and presented homogeneous middle-gray areas. The results of shear wave velocity were similar statically (P = 0.3087): 1) left adrenal -1.42 m/s for cranial polar, 1.31 m/s for body region, and 1.71 m/s for caudal polar; 2) right adrenal -1.42 m/s for cranial polar, 1.74 m/s for body region and 1.63 m/s for caudal pole. Quantitative and qualitative ARFI elastography of dogs' adrenal glands is feasible, well tolerated, easily implemented and may provide baseline data in the study of this structure to allow the use of ARFI.Keywords: canine, adrenal, ultrasound (P = 0,3087) RESUMO Objetivou-se descrever a técnica de elastografia ARFI na avaliação das glândulas adrenais em cães adultos, visando avaliar a rigidez do parênquima adrenal saudável e determinar os padrões qualitativos e quantitativos (velocidade de cisalhamento) da técnica ARFI, ainda não descritos em medicina veterinária. Sessenta glândulas adrenais de 30 cães adultos saudáveis foram avaliadas pela ultrassonografia modo B e pela elastografia ARFI qualitativa e quantitativa para avaliar a rigidez do parênquima saudável e determinar a velocidade de cisalhamento e padrões qualitativos da ARFI no corpo, polos adrenais cranial e caudal. As características ultrassonográficas das glândulas foram normais. A elastografia qualitativa mostrou que glândulas adrenais não se apresentaram deformáveis e homogêneas (coloração cinza médio). Os resultados da velocidade de cisalhamento foram semelhantes
The aim of this study was to determine the vascular indices of adrenal blood flow in healthy dogs (systolic velocity -SV; diastolic velocity -DV; resistance index -RI). Eighteen dogs (thirty six adrenal) were studied. Physical examination, biochemical profile and dexamethasone suppression test were performed to determine general health status. Echotexture, size, contours and margins, and overall shape of the adrenal gland (right and left) were assessed via ultrasound. By spectral Doppler of the phrenicabdominal artery, the SV, DV, and RI were acquired. Animals did not show alterations in clinical and laboratory examination and suppression of cortisol. Normal homogeneous and echotexture, regular contours and margins and normal shape and size were verified via B mode. Spectral Doppler of the phrenic-abdominal artery showed monophasic-patterned waves and low vascular resistance and systolic peak evident with means values: left adrenal -SV = 31.34cm/s, DV = 9.54cm/s and RI = 0.69; and right adrenal -SV = 27.83cm/s, DV = 7.71cm/s and RI = 0.68. Doppler evaluation of adrenal was easily implemented and may provide base line data in the study, allowing for the use of this technique as a diagnostic tool for diseases of the dog's adrenal.Keywords: canine, adrenal glands, ultrasound, vascularization Palavras-chave: canino, glândulas adrenais, ultrassom, vascularização RESUMO Objetivou-se determinar os índices vasculares do fluxo sanguíneo das glândulas adrenais de cães saudáveis (velocidade sistólica -VS; velocidade diastólica -VD; o índice de resistência -IR). Foram utilizados neste estudo 18 cães (36 adrenais). Foram realizados exame físico, perfil bioquímico e teste de supressão com dexametasona para determinar o estado geral de saúde (higidez). Ecotextura, ecogenicidade, tamanho, contornos e margens e o formato das glândulas adrenais (direito e esquerdo) foram avaliados por meio da ultrassonografia convencional. Ao Doppler espectral da artéria frênico-abdominal, foram adquiridos a VS, a VD e o IR. Os animais não apresentaram alterações aos exames
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